Patent ID: 11961164
Assignee: SIEMENS MEDICAL SOLUTIONS USA, INC.
Field: Medical technology (Instruments)
Classification: CPC G  A | IPC A  G

Claim 9:
10. The system of claim 6, further comprising updating the crystal efficiency normalization coefficient by updating, ε
   i
   
    (
    
     m
     +
     1
    
    )
   
  
  =
  
   
    
     -
     
      B
      i
     
    
    +
    
     
      
       B
       i
       2
      
      +
      
       4
       ⁢
       
        A
        i
       
       ⁢
       
        C
        i
       
      
     
    
   
   
    2
    ⁢
    
     A
     i
    
   
  
 

 
  
   
    A
    i
   
   =
   
    
     ∑
     j
    
    
     
      ∑
      
       i
       ′
      
     
     
      
       ω
       
        j
        ,
        
         ii
         ′
        
       
      
      ⁢
      
       
        g
        
         ii
         ′
        
       
       (
       
        
         
          
           p
           _
          
          j
         
         (
         f
         )
        
        +
        
         S
         j
        
       
       )
      
     
    
   
  
  ,
 

 
  
   B
   i
  
  =
  
   
    
     ∑
     j
    
    
     
      ∑
      
       i
       ′
      
     
     
      
       
        ω
        
         j
         ,
         
          ii
          ′
         
        
       
       (
       
        
         
          
           p
           _
          
          j
         
         (
         f
         )
        
        +
        
         S
         j
        
       
       )
      
      ⁢
      
       ε
       
        i
        ′
       
       
        (
        m
        )
       
      
     
    
   
   -
   
    
     A
     i
    
    ⁢
    
     ε
     i
     
      (
      m
      )
     
    
   
  
 

 
  
   C
   i
  
  =
  
   
    ε
    i
    
     (
     m
     )
    
   
   ⁢
   
    
     ∑
     
      j
      ⁢
      T
     
    
    
     
      
       y
       
        j
        ⁢
        t
       
      
      
       
        
         y
         _
        
        
         j
         ⁢
         T
        
        
         (
         m
         )
        
       
       (
       
        f
        ,
        
         ε
         
          (
          m
          )
         
        
       
       )
      
     
     ⁢
     
      
       ∑
       
        i
        ′
       
      
      
       
        
         ω
         
          j
          ,
          
           ii
           ′
          
         
        
        (
        
         
          
           
            p
            _
           
           jT
          
          (
          f
          )
         
         +
         
          S
          
           j
           ⁢
           T
          
         
        
        )
       
       ⁢
       
        ε
        
         i
         ′
        
        
         (
         m
         )
        
       
      
     
    
   
  
 

 
  
   j
   =
   
    {
    
     ρ
     ⁢
     θz
    
    }
   
  
  ,
 

wherein m is iteration number for the updating the crystal efficiency ε; and
wherein pj and Sj represent summation of pjT and SjT over TOF bin index T.