Document:

IN
WITNESS WHEREOF, the parties hereto have executed and delivered this Amendment
as of the date first written above.

       

      
        
          
            
              
                
                  
                    
                      
                        
                          
                            
                              
                                
                                  
                                    
                                      
                                        
                                          
                                            
                                              
                                                
                                                  
                                                    
                                                      
                                                        
                                                          
                                                            
                                                              
                                                                
                                                                  
                                                                    
                                                                      
                                                                        
                                                                          
                                                                            
                                                                              
                                                                                
                                                                                  
                                                                                    
                                                                                      
                                                                                        
                                                                                          	
                                                                                                  RADNET
      MANAGEMENT, INC.

                                                                                                	 
      	 
      	 
	 
      	 
      	 
      	 
	 
      	
                                                                                                  By: 

                                                                                                	
                                                                                                  /s/
      Howard G. Berger

                                                                                                	 
	 
      	
                                                                                                  Name: 
      Howard
      G. Berger, M.D.

                                                                                                	 
	 
      	
                                                                                                  Title:  President

                                                                                                	 
	 
      	 
      	 
      	 
	 
      	
                                                                                                  PRIMEDEX
      HEALTH SYSTEMS, INC.

                                                                                                	 
	 
      	 
      	 
      	 
	 
      	
                                                                                                  By: 

                                                                                                	
                                                                                                  /s/
      Howard G. Berger

                                                                                                	 
	 
      	
                                                                                                        
                                                                                                    Name: 
      Howard
      G. Berger, M.D.

                                                                                                  

                                                                                                	 
	 
      	
                                                                                                  Title: 
      President

                                                                                                	 
	 
      	 
      	 
      	 
	 
      	
                                                                                                  BEVERLY
      RADIOLOGY MEDICAL GROUP
III

                                                                                                
	 
      	 
      	 
	 
      	
                                                                                                  By:
      ProNet Imaging Medical Group, Inc., its

                                                                                                  general
      partner

                                                                                                	 
	 
      	 
      	 
      	 
	 
      	
                                                                                                  By: 

                                                                                                	
                                                                                                  /s/
      Howard G. Berger

                                                                                                	 
	 
      	
                                                                                                        
                                                                                                    Name: 
      Howard
      G. Berger, M.D.

                                                                                                  

                                                                                                	 
	 
      	
                                                                                                  Title: 
      President

                                                                                                	 
	 
      	 
      	 
      	 
	 
      	
                                                                                                  By:
      Beverly Radiology Medical Group, Inc., its

                                                                                                  general
      partner

                                                                                                	 
	 
      	 
      	 
      	 
	 
      	
                                                                                                  By: 

                                                                                                	
                                                                                                  /s/
      Howard G. Berger

                                                                                                	  
	 
      	
                                                                                                        
                                                                                                    Name: 
      Howard
      G. Berger, M.D.

                                                                                                  

                                                                                                	 
	 
      	
                                                                                                  Title: 
      President

                                                                                                	 
	 
      	 
      	 
      	 
	 
      	
                                                                                                  PRONET
      IMAGING MEDICAL GROUP, INC.

                                                                                                
	 
      	 
      	 
      	 
	 
      	
                                                                                                  By: 

                                                                                                	
                                                                                                  /s/
      Howard G. Berger

                                                                                                	  
	 
      	
                                                                                                        
                                                                                                    Name: 
      Howard
      G. Berger, M.D.

                                                                                                  

                                                                                                	 
	 
      	
                                                                                                  Title: 
      President

                                                                                                	 

                                                                                        

                                                                                      

                                                                                    

                                                                                  

                                                                                

                                                                              

                                                                            

                                                                          

                                                                        

                                                                      

                                                                    

                                                                  

                                                                

                                                              

                                                            

                                                          

                                                        

                                                      

                                                    

                                                  

                                                

                                              

                                            

                                          

                                        

                                      

                                    

                                  

                                

                              

                            

                          

                        

                      

                    

                  

                

              

            

          

        

      

      
        
          Signature
Page to Amendment No. 2 to Credit Agreement

           

        

        
          
          

          
            

          

        

        
           

        

      

      

      
        
          
            
              
                
                  
                    
                      
                        
                          
                            
                              
                                
                                  
                                    
                                      
                                        
                                          
                                            
                                              
                                                
                                                  
                                                    
                                                      
                                                        
                                                          	 
      	
                                                                  BEVERLY
      RADIOLOGY MEDICAL GROUP,

                                                                  INC.

                                                                
	 
      	 
      	 
      	 
	 
      	
                                                                  By: 

                                                                	
                                                                  /s/
      Howard G. Berger

                                                                	 
	 
      	
                                                                        
                                                                    Name: 
      Howard
      G. Berger,
      M.D.

                                                                  

                                                                	 
	 
      	
                                                                  Title: 
      President

                                                                	 
	 
      	 
      	 
      	 
	 
      	
                                                                  RADNET
      SUB, INC.

                                                                	 
	 
      	 
      	 
      	 
	 
      	
                                                                  By: 

                                                                	
                                                                  /s/
      Howard G. Berger

                                                                	 
	 
      	
                                                                        
                                                                    Name: 
      Howard
      G. Berger,
      M.D.

                                                                  

                                                                	 
	 
      	
                                                                  Title: 
      President

                                                                	 
	 
      	 
      	 
      	 
	 
      	
                                                                  SO
      CAL MR SITE MANAGEMENT, INC.

                                                                	 
	 
      	 
      	 
	 
      	
                                                                  By: 

                                                                	
                                                                  /s/
      Howard G. Berger

                                                                	 
	 
      	
                                                                        
                                                                    Name: 
      Howard
      G. Berger,
      M.D.

                                                                  

                                                                	 
	 
      	
                                                                  Title: 
      President

                                                                	 
	 
      	 
      	 
      	 
	 
      	
                                                                  RADNET
      MANAGEMENT I, INC.

                                                                	 
	 
      	 
      	 
      	 
	 
      	
                                                                  By: 

                                                                	
                                                                  /s/
      Howard G. Berger

                                                                	 
	 
      	
                                                                        
                                                                    Name: 
      Howard
      G. Berger,
      M.D.

                                                                  

                                                                	 
	 
      	
                                                                  Title: 
      President

                                                                	 
	 
      	 
      	 
      	 
	 
      	
                                                                  RADNET
      MANAGEMENT II, INC.

                                                                	 
	 
      	 
      	 
      	 
	 
      	
                                                                  By: 

                                                                	
                                                                  /s/
      Howard G. Berger

                                                                	 
	 
      	
                                                                        
                                                                    Name: 
      Howard
      G. Berger,
      M.D.

                                                                  

                                                                	 
	 
      	
                                                                  Title: 
      President

                                                                	 

                                                        

                                                      

                                                    

                                                  

                                                

                                              

                                            

                                          

                                        

                                      

                                    

                                  

                                

                              

                            

                          

                        

                      

                    

                  

                

              

            

          

        

      

      
        
          Signature
Page to Amendment No. 2 to Credit Agreement

           

        

        
          
          

          
            

          

        

        
           

        

      

       

      
        
          
            
              
                
                  
                    
                      
                        
                          
                            
                              
                                
                                  
                                    
                                      
                                        
                                          
                                            
                                              
                                                
                                                  
                                                    
                                                      	 
      	
                                                              RADNET
      MANAGED IMAGING

                                                              SERVICES,
      INC.

                                                            	 
	 
      	 
      	 
      	 
	 
      	
                                                              By: 

                                                            	
                                                              /s/
      Howard G. Berger

                                                            	 
	 
      	
                                                                    
                                                                Name: 
      Howard
      G. Berger,
      M.D.

                                                              

                                                            	 
	 
      	
                                                              Title: 
      President

                                                            	 
	 
      	 
      	 
      	 
	 
      	
                                                              DIAGNOSTIC
      IMAGING SERVICES, INC.

                                                            	 
	 
      	 
      	 
      	 
	 
      	
                                                              By: 

                                                            	
                                                              /s/
      Howard G. Berger

                                                            	 
	 
      	
                                                                    
                                                                Name: 
      Howard
      G. Berger,
      M.D.

                                                              

                                                            	 
	 
      	
                                                              Title: 
      Chief Financial
      Officer

                                                            	 
	 
      	 
      	 
      	 
	 
      	
                                                              RADIOLOGIX,
      INC.

                                                            	 
	 
      	 
      	 
	 
      	
                                                              By: 

                                                            	
                                                              /s/
      Howard G. Berger

                                                            	 
	 
      	
                                                                    
                                                                Name: 
      Howard
      G. Berger,
      M.D.

                                                              

                                                            	 
	 
      	
                                                              Title: 
      President

                                                            	 
	 
      	 
      	 
      	 
	 
      	
                                                              ADVANCED
      IMAGING PARTNERS, INC.

                                                            	 
	 
      	 
      	 
      	 
	 
      	
                                                              By: 

                                                            	
                                                              /s/
      Howard G. Berger

                                                            	 
	 
      	
                                                                    
                                                                Name: 
      Howard
      G. Berger,
      M.D.

                                                              

                                                            	 
	 
      	
                                                              Title: 
      President

                                                            	 
	 
      	 
      	 
      	 
	 
      	
                                                              IDE
      IMAGING PARTNERS, INC.

                                                            	 
	 
      	 
      	 
      	 
	 
      	
                                                              By: 

                                                            	
                                                              /s/
      Howard G. Berger

                                                            	 
	 
      	
                                                                    
                                                                Name: 
      Howard
      G. Berger,
      M.D.

                                                              

                                                            	 
	 
      	
                                                              Title: 
      President

                                                            	 

                                                    

                                                  

                                                

                                              

                                            

                                          

                                        

                                      

                                    

                                  

                                

                              

                            

                          

                        

                      

                    

                  

                

              

            

          

        

      

       

      
        
          Signature
Page to Amendment No. 2 to Credit Agreement

           

        

        
          
          

          
            

          

        

        
           

        

      

      

      
        
          
            
              
                
                  
                    
                      
                        
                          
                            
                              
                                
                                  
                                    
                                      
                                        
                                          
                                            
                                              
                                                
                                                  
                                                    
                                                      
                                                        
                                                          
                                                            	 
      	
                                                                    MID
      ROCKLAND IMAGING PARTNERS,

                                                                    INC.

                                                                  
	 
      	 
      	 
      	 
	 
      	
                                                                    By: 

                                                                  	
                                                                    /s/
      Howard G. Berger

                                                                  	 
	 
      	
                                                                          
                                                                      Name: 
      Howard
      G. Berger,
      M.D.

                                                                    

                                                                  	 
	 
      	
                                                                    Title: 
      President

                                                                  	 
	 
      	 
      	 
      	 
	 
      	
                                                                    PACIFIC
      IMAGING PARTNERS, INC.

                                                                  	 
	 
      	 
      	 
      	 
	 
      	
                                                                    By: 

                                                                  	
                                                                    /s/
      Howard G. Berger

                                                                  	 
	 
      	
                                                                          
                                                                      Name: 
      Howard
      G. Berger,
      M.D.

                                                                    

                                                                  	 
	 
      	
                                                                    Title: 
      President

                                                                  	 
	 
      	 
      	 
      	 
	 
      	
                                                                    QUESTAR
      IMAGING, INC.

                                                                  	 
	 
      	 
      	 
	 
      	
                                                                    By: 

                                                                  	
                                                                    /s/
      Howard G. Berger

                                                                  	 
	 
      	
                                                                          
                                                                      Name: 
      Howard
      G. Berger,
      M.D.

                                                                    

                                                                  	 
	 
      	
                                                                    Title: 
      President

                                                                  	 
	 
      	 
      	 
      	 
	 
      	
                                                                    TREASURE
      COAST IMAGING PARTNERS,

                                                                    INC.

                                                                  	 
	 
      	 
      	 
      	 
	 
      	
                                                                    By: 

                                                                  	
                                                                    /s/
      Howard G. Berger

                                                                  	 
	 
      	
                                                                          
                                                                      Name: 
      Howard
      G. Berger,
      M.D.

                                                                    

                                                                  	 
	 
      	
                                                                    Title: 
      President

                                                                  	 
	 
      	 
      	 
      	 
	 
      	
                                                                    COMMUNITY
      IMAGING PARTNERS, INC.

                                                                  
	 
      	 
      	 
      	 
	 
      	
                                                                    By: 

                                                                  	
                                                                    /s/
      Howard G. Berger

                                                                  	 
	 
      	
                                                                          
                                                                      Name: 
      Howard
      G. Berger,
      M.D.

                                                                    

                                                                  	 
	 
      	
                                                                    Title: 
      President

                                                                  	 

                                                          

                                                        

                                                      

                                                    

                                                  

                                                

                                              

                                            

                                          

                                        

                                      

                                    

                                  

                                

                              

                            

                          

                        

                      

                    

                  

                

              

            

          

        

      

      
        
          Signature
Page to Amendment No. 2 to Credit Agreement

           

        

        
          
          

          
            

          

        

        
           

        

      

       

      
        
          
            
              
                
                  
                    
                      
                        
                          
                            
                              
                                
                                  
                                    
                                      
                                        
                                          
                                            
                                              
                                                
                                                  
                                                    
                                                      	 
      	
                                                              RADIOLOGY
      AND NUCLEAR MEDICINE

                                                              IMAGING
      PARTNERS, INC.

                                                            	 
	 
      	 
      	 
      	 
	 
      	
                                                              By: 

                                                            	
                                                              /s/
      Howard G. Berger

                                                            	 
      
	 
      	
                                                                    
                                                                Name: 
      Howard
      G. Berger,
      M.D.

                                                              

                                                            	 
	 
      	
                                                              Title:
       President

                                                            	 
	 
      	 
      	 
      	 
	 
      	
                                                              VALLEY
      IMAGING PARTNERS, INC.

                                                            	 
	 
      	 
      	 
      	 
	 
      	
                                                              By: 

                                                            	
                                                              /s/
      Howard G. Berger

                                                            	  
	 
      	
                                                                    
                                                                Name: 
      Howard
      G. Berger,
      M.D.

                                                              

                                                            	 
	 
      	
                                                              Title: 
      President

                                                            	 
	 
      	 
      	 
      	 
	 
      	
                                                              QUESTAR
      DULUTH, INC.

                                                            	 
	 
      	 
      	 
	 
      	
                                                              By: 

                                                            	
                                                              /s/
      Howard G. Berger

                                                            	 
      
	 
      	
                                                                    
                                                                Name: 
      Howard
      G. Berger,
      M.D.

                                                              

                                                            	 
	 
      	
                                                              Title: 
      President

                                                            	 
	 
      	 
      	 
      	 
	 
      	
                                                              QUESTAR
      LOS ALAMITOS, INC.

                                                            	 
	 
      	 
      	 
      	 
	 
      	
                                                              By: 

                                                            	
                                                              /s/
      Howard G. Berger

                                                            	 
      
	 
      	
                                                                    
                                                                Name: 
      Howard
      G. Berger,
      M.D.

                                                              

                                                            	 
	 
      	
                                                              Title: 
      President

                                                            	 
	 
      	 
      	 
      	 
	 
      	
                                                              QUESTAR
      VICTORVILLE, INC.

                                                            	 
	 
      	 
      	 
      	 
	 
      	
                                                              By: 

                                                            	
                                                              /s/
      Howard G. Berger

                                                            	 
      
	 
      	
                                                                    
                                                                Name: 
      Howard
      G. Berger,
      M.D.

                                                              

                                                            	 
	 
      	
                                                              Title: 
      President

                                                            	 

                                                    

                                                  

                                                

                                              

                                            

                                          

                                        

                                      

                                    

                                  

                                

                              

                            

                          

                        

                      

                    

                  

                

              

            

          

        

      

       

      
        
          Signature
Page to Amendment No. 2 to Credit Agreement

           

        

        
          
          

          
            

          

        

        
           

        

      

      

      
        
          
            
              
                
                  
                    
                      
                        
                          
                            
                              
                                
                                  	 
      	
                                          ROCKY
      MOUNTAIN OPENSCAN MRI, LLC

                                        
	 
      	 
      	 
      	 
	 
      	
                                          By: 

                                        	
                                          /s/
      Howard G. Berger

                                        	 
      
	 
      	
                                                
                                            Name: 
      Howard
      G. Berger,
      M.D.

                                          

                                        	 
	 
      	
                                          Title: 
      President

                                        	 
	 
      	 
      	 
      	 
	 
      	
                                          FRI,
      INC.

                                        	 
	 
      	 
      	 
      	 
	 
      	
                                          By: 

                                        	
                                          /s/
      Howard G. Berger

                                        	 
      
	 
      	
                                                
                                            Name: 
      Howard
      G. Berger,
      M.D.

                                          

                                        	 
	 
      	
                                          Title: 
      President

                                        	 

                                

                              

                            

                          

                        

                      

                    

                  

                

              

            

          

        

      

    

     

    
      
        Signature
Page to Amendment No. 2 to Credit Agreement

        
        

      

      
        
        

        
          

        

      

      
        
        

      

    

     

    
      
        
          
            
              
                
                  
                    
                      
                        	
                                GENERAL
      ELECTRIC CAPITAL

                                CORPORATION,

                              	 
	
                                as
      Agent and a Lender

                              	 
	 
      	 
	
                                By:

                              	
                                /s/
      GENERAL ELECTRIC CAPITAL CORPORATION

                              	 
	 
      	
                                Duly
      Authorized Signatory

                              	 

                      

                    

                  

                

              

            

          

        

      

    

     

    
      
        Signature
Page to Amendment No. 2 to Credit Agreement

        
        

      

      
        
        

        
          

        

      

      
        
        

      

    

     

    
      
        
          
            
              
                
                  
                    
                      
                        
                          	
                                  [INSERT NAME OF
      LENDER], as a
      Lender

                                	 
	 
      	 
	
                                  By:

                                	  
      	 
	
                                  Name:

                                	 
      	 
	
                                  Title:

                                	  
      	 

                        

                      

                    

                  

                

              

            

          

        

      

    

     

    
      
        Signature
Page to Amendment No. 2 to Credit AgreementUnassociated Document

    

    
      
        
        

      

      
        
        

        
          

        

      

      
        
        

      

    

    

    
      
        
        

      

      
        
        

        
          

        

      

      
        
        

      

    

    

    
      
        
        

      

      
        
        

        
          

        

      

      
        
        

      

    

    
 

    
      
        
        

      

      
        
        

        
          

        

      

      
        
        

      

    

     

    
      
        IN
WITNESS WHEREOF, the parties hereto have executed and delivered this Amendment
as of the date first written above.

        

        
          
            
              
                
                  	
                          RADNET
      MANAGEMENT, INC.

                        
	 
      
	
                          By:

                        	
                          /s/ Howard G. Berger

                        
	
                          Name:

                        	Howard
      G. Berger, M.D.
	
                          Title:

                        	President

                

              

            

          

        

        

        
          
            
              
                
                  	
                          
                            RADNET,
      INC.

                          

                        
	 
      
	
                          By:

                        	
                          /s/ Howard G. Berger

                        
	
                          Name:

                        	Howard
      G. Berger, M.D.
	
                          Title:

                        	President

                

              

            

          

        

        

        
          
            
              
                
                  	
                          BEVERLY
      RADIOLOGY MEDICAL GROUP

                          III

                        
	 
      
	
                          By:
      ProNet Imaging Medical Group, Inc., its

                          general
      partner

                        
	 
      
	
                          By:

                        	
                          /s/
      Howard G. Berger 

                        
	
                          Name:

                        	Howard
      G. Berger, M.D.
	
                          Title:

                        	President

                

              

            

          

        

        

        
          
            
              
                
                  	
                          By:
      Beverly Radiology Medical Group, Inc., its

                          general
      partner

                        
	 
      
	
                          By:

                        	
                          /s/
      Howard G.
  Berger

                        
	
                          Name:

                        	Howard
      G. Berger, M.D.
	
                          Title:

                        	President

                

              

            

          

        

        

        
          
            
              
                
                  	
                          PRONET
      IMAGING MEDICAL GROUP, INC.

                        
	 
      
	
                          By:

                        	
                          /s/
      Howard G.
  Berger

                        
	
                          Name:

                        	Howard
      G. Berger, M.D.
	
                          Title:

                        	President

                

              

            

          

        

         

        
          
            Signature
Page to Amendment No. 4 to Credit Agreement

            
            

          

          
            
            

            
              

            

          

          
            
            

          

        

         

        
          
            
              
                
                  
                    
                      	
                              BEVERLY
      RADIOLOGY MEDICAL GROUP,

                              INC.

                            
	 
      
	
                              By:

                            	
                              /s/
      Howard G.
  Berger

                            
	
                              Name:

                            	Howard
      G. Berger, M.D.
	
                              Title:

                            	President

                    

                  

                

              

            

          

        

        

        
          
            
              
                
                  	
                          RADNET
      SUB, INC.

                        
	 
      
	
                          By:

                        	
                          /s/
      Howard G.
  Berger

                        
	
                          Name:

                        	Howard
      G. Berger, M.D.
	
                          Title:

                        	President

                

              

            

          

        

        

        
          
            
              
                	
                        SO
      CAL MR SITE MANAGEMENT, INC.

                      
	 
      
	
                        By:

                      	
                        /s/
      Howard G.
      Berger

                      
	
                        Name:

                      	Howard
      G. Berger, M.D.
	
                        Title:

                      	President

              

            

          

        

        

        
          
            
              
                	
                        RADNET
      MANAGEMENT I, INC.

                      
	 
      
	
                        By:

                      	
                        /s/
      Howard G.
      Berger

                      
	
                        Name:

                      	Howard
      G. Berger, M.D.
	
                        Title:

                      	President

              

            

          

        

        

        
          
            
              
                	
                        RADNET
      MANAGEMENT II, INC.

                      
	 
      
	
                        By:

                      	
                        /s/
      Howard G.
      Berger

                      
	
                        Name:

                      	Howard
      G. Berger, M.D.
	
                        Title:

                      	President

              

            

          

        

         

        
          
            Signature
Page to Amendment No. 4 to Credit Agreement

            
            

          

          
            
            

            
              

            

          

          
            
            

          

        

         

        
          
            
              
                
                  
                    	
                            RADNET
      MANAGED IMAGING

                            SERVICES,
      INC.

                          
	 
      
	
                            By:

                          	
                            /s/
      Howard G.
      Berger

                          
	
                            Name:

                          	Howard
      G. Berger, M.D.
	
                            Title:

                          	President

                  

                

              

            

          

        

        

        
          
            
              
                	
                        DIAGNOSTIC
      IMAGING SERVICES, INC.

                      
	 
      
	
                        By:

                      	
                        /s/
      Howard G.
      Berger

                      
	
                        Name:

                      	Howard
      G. Berger, M.D.
	
                        Title:

                      	

                        Chief
      Financial Officer

                      

              

            

          

        

        

        
          
            
              
                	
                        RADIOLOGIX,
      INC.

                      
	 
      
	
                        By:

                      	
                        /s/
      Howard G.
      Berger

                      
	
                        Name:

                      	Howard
      G. Berger, M.D.
	
                        Title:

                      	President

              

            

          

        

        

        
          
            
              
                	
                        ADVANCED
      IMAGING PARTNERS, INC.

                      
	 
      
	
                        By:

                      	
                        /s/
      Howard G.
      Berger

                      
	
                        Name:

                      	Howard
      G. Berger, M.D.
	
                        Title:

                      	President

              

            

          

        

        

        
          
            
              
                	
                        IDE
      IMAGING PARTNERS, INC.

                      
	 
      
	
                        By:

                      	
                        /s/
      Howard G.
      Berger

                      
	
                        Name:

                      	Howard
      G. Berger, M.D.
	
                        Title:

                      	President

              

            

          

        

         

        
          
            Signature
Page to Amendment No. 4 to Credit Agreement

            
            

          

          
            
            

            
              

            

          

          
            
            

          

        

         

        
          
            
              
                	
                        MID
      ROCKLAND IMAGING PARTNERS,

                        INC.

                      
	 
      
	
                        By:

                      	
                        /s/
      Howard G.
      Berger

                      
	
                        Name:

                      	Howard
      G. Berger, M.D.
	
                        Title:

                      	President

              

            

          

        

        

        
          
            
              
                	
                        PACIFIC
      IMAGING PARTNERS, INC.

                      
	 
      
	
                        By:

                      	
                        /s/
      Howard G.
      Berger

                      
	
                        Name:

                      	Howard
      G. Berger, M.D.
	
                        Title:

                      	President

              

            

          

        

        

        
          
            
              
                	
                        QUESTAR
      IMAGING, INC.

                      
	 
      
	
                        By:

                      	
                        /s/
      Howard G.
      Berger

                      
	
                        Name:

                      	Howard
      G. Berger, M.D.
	
                        Title:

                      	President

              

            

          

        

        

        
          
            
              
                
                  
                    	
                            TREASURE
      COAST IMAGING PARTNERS,

                            INC.

                          
	 
      
	
                            By:

                          	
                            /s/
      Howard G.
      Berger

                          
	
                            Name:

                          	Howard
      G. Berger, M.D.
	
                            Title:

                          	President

                  

                

              

            

          

        

        

        
          
            
              
                	
                        COMMUNITY
      IMAGING PARTNERS, INC.

                      
	 
      
	
                        By:

                      	
                        /s/
      Howard G.
      Berger

                      
	
                        Name:

                      	Howard
      G. Berger, M.D.
	
                        Title:

                      	President

              

            

          

        

         

        
          
            Signature
Page to Amendment No. 4 to Credit Agreement

            
            

          

          
            
            

            
              

            

          

          
            
            

          

        

         

        
          
            
              
                
                  
                    
                      
                        	
                                RADIOLOGY
      AND NUCLEAR MEDICINE

                                IMAGING
      PARTNERS, INC.

                              
	 
      
	
                                By:

                              	
                                /s/
      Howard G.
      Berger

                              
	
                                Name:

                              	Howard
      G. Berger, M.D.
	
                                Title:

                              	President

                      

                    

                  

                

              

            

          

        

         

        
          
            
              
                	
                        VALLEY
      IMAGING PARTNERS, INC.

                      
	 
      
	
                        By:

                      	
                        /s/
      Howard G.
      Berger

                      
	
                        Name:

                      	Howard
      G. Berger, M.D.
	
                        Title:

                      	President

              

            

          

        

        

        
          
            
              
                	
                        QUESTAR
      DULUTH, INC.

                      
	 
      
	
                        By:

                      	
                        /s/
      Howard G.
      Berger

                      
	
                        Name:

                      	Howard
      G. Berger, M.D.
	
                        Title:

                      	President

              

            

          

        

        

        
          
            
              
                	
                        QUESTAR
      LOS ALAMITOS, INC.

                      
	 
      
	
                        By:

                      	
                        /s/
      Howard G.
      Berger

                      
	
                        Name:

                      	Howard
      G. Berger, M.D.
	
                        Title:

                      	President

              

            

          

        

        

        
          
            
              
                	
                        QUESTAR
      VICTORVILLE, INC.

                      
	 
      
	
                        By:

                      	
                        /s/
      Howard G.
      Berger

                      
	
                        Name:

                      	Howard
      G. Berger, M.D.
	
                        Title:

                      	President

              

            

          

        

         

        
          
            Signature
Page to Amendment No. 4 to Credit Agreement

            
            

          

          
            
            

            
              

            

          

          
            
            

          

        

         

        
          
            
              
                	
                        ROCKY
      MOUNTAIN OPENSCAN MRI, LLC

                      
	 
      
	
                        By:

                      	
                        /s/
      Howard G.
      Berger

                      
	
                        Name:

                      	Howard
      G. Berger, M.D.
	
                        Title:

                      	President

              

            

          

        

        

        
          
            
              
                	
                        FRI,
      INC.

                      
	 
      
	
                        By:

                      	
                        /s/
      Howard G.
      Berger

                      
	
                        Name:

                      	Howard
      G. Berger, M.D.
	
                        Title:

                      	President

              

            

          

        

         

        
          
            Signature
Page to Amendment No. 4 to Credit Agreement

            
            

          

          
            
            

            
              

            

          

          
            
            

          

        

         

        
          
            	
                    FRI
      II, INC.

                  
	 
      
	
                    By:

                  	
                    /s/
      Howard G.
      Berger

                  
	
                    Name:

                  	Howard
      G. Berger, M.D.
	
                    Title:

                  	President

          

        

         

        
          
            Signature
Page to Amendment No. 4 to Credit Agreement

            
            

          

          
            
            

            
              

            

          

          
            
            

          

        

         

        
          
            
              	
                      GENERAL
      ELECTRIC CAPITAL

                      CORPORATION,

                    
	
                      as
      Agent and a Lender

                    
	 
      
	
                      By:

                    	
                      /s/
      General Electric Capital Corporation

                    
	 
      	
                      Duly
      Authorized Signatory

                    

            

          

        

         

        
          
            Signature
Page to Amendment No. 4 to Credit Agreement

            
            

          

          
            
            

            
              

            

          

          
            
            

          

        

         

        
          
            
              
                
                  	
                          [INSERT NAME OF LENDER],
      as a Lender

                        
	 
      
	
                          By:

                        	 
      
	
                          Name:

                        	 
      
	
                          Title:

                        	 
      

                

              

            

          

        

         

        
          
            Signature
Page to Amendment No. 4 to Credit Agreement

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