EXHIBIT
21
 
 SUBSIDIARIES
 
 Registrant’s
                                                  Subsidiaries
                                                
                                                Percentage
                                                  Ownership
                                                
                                                State of
                                                  IncorporationRadnet
      Management, Inc.
                                                
                                                100%
                                                
                                                CaliforniaRadnet
      Managed Imaging Services, Inc.
                                                
                                                100%
                                                
                                                CaliforniaRadnet
      Management I, Inc.
                                                
                                                100%
                                                
                                                CaliforniaRadnet
      Management II, Inc.
                                                
                                                100%
                                                
                                                CaliforniaRadnet
      Sub, Inc.
                                                
                                                100%
                                                
                                                CaliforniaFRI
      II, Inc.
                                                
                                                100%
                                                
                                                CaliforniaFRI,
      Inc.
                                                
                                                100%
                                                
                                                CaliforniaPacific
      Imaging Partners, Inc.
                                                
                                                100%
                                                
                                                CaliforniaRolling
      Oaks Imaging Corporation
                                                
                                                100%
                                                
                                                CaliforniaRolling
      Oaks Radiology, Inc.
                                                
                                                100%
                                                
                                                CaliforniaSoCal
      MR Site Management, Inc.
                                                
                                                100%
                                                
                                                CaliforniaValley
      Imaging Partners Inc.
                                                
                                                100%
                                                
                                                CaliforniaAdvanced
      Imaging Partners, Inc.
                                                
                                                100%
                                                
                                                DelawareCommunity
      Imaging Partners, Inc.
                                                
                                                100%
                                                
                                                DelawareDelaware
      Imaging Partners, Inc.
                                                
                                                100%
                                                
                                                DelawareDiagnostic
      Imaging Services, Inc.
                                                
                                                100%
                                                
                                                DelawareIde
      Imaging Partners, Inc.
                                                
                                                100%
                                                
                                                DelawareMid
      Rockland Imaging Partners, Inc.
                                                
                                                100%
                                                
                                                DelawareRadiologix,
      Inc.
                                                
                                                100%
                                                
                                                DelawareRadiology
      and Nuclear Medicine Imaging Partners, Inc.
                                                
                                                100%
                                                
                                                DelawareTreasure
      Coast Imaging Partners, Inc.
                                                
                                                100%
                                                
                                                DelawareQuestar
      Imaging, Inc.
                                                
                                                100%
                                                
                                                FloridaQuestar
      Los Alamitos,Inc.
                                                
                                                100%
                                                
                                                FloridaQuestar
      Victorville, Inc.
                                                
                                                100%
                                                
                                                FloridaNew
      Jersey Imaging Partners, Inc.
                                                
                                                100%
                                                
                                                New
      Jersey