Patent ID: 11933743
Assignee: CANON KABUSHIKI KAISHA
Field: Audio-visual technology (Electrical engineering)
Classification: CPC G  A  H | IPC A  G  H

Claim 11:
12. The imaging control apparatus according to claim 11, wherein
in the generation of the difference image, letting mask images generated based on the image of the effective atomic number and the image of the area density be respectively ZM and DM, and live images generated based on the image of the effective atomic number and the image of the area density be respectively ZL and DL, a difference image DDSA of an area density and a difference image ZDSA of an effective atomic number are generated using:, D
    DSA
   
   =
   
    
     D
     L
    
    -
    
     D
     M
    
   
  
  ⁢
  

  
   
    Z
    DSA
   
   =
   
    
     
      
       Z
       L
       n
      
      *
      
       
        D
        L
       
       
        D
        
         D
         ⁢
         S
         ⁢
         A
        
       
      
     
     -
     
      
       Z
       M
       n
      
      *
      
       
        D
        M
       
       
        D
        DSA
       
      
     
    
    n
   
  
 

(wherein n is a real number larger than or equal to 2.5 and smaller than or equal to 3).