Patent ID: 11900592
Assignee: PING AN TECHNOLOGY (SHENZHEN) CO., LTD
Field: Medical technology (Instruments)
Classification: CPC G  A | IPC A  G

Claim 6:
7. The method according to claim 5, wherein gradually deforming the initial mesh model to fit the surface of the segmentation mask of the pancreas and the mass of the patient to preserve the anatomy of the pancreas of the patient includes:
guiding the deformation process by a loss function Lmeshfit;
wherein, L
      
        m
        ⁢
        e
        ⁢
        s
        ⁢
        h
        ⁢
        f
        ⁢
        i
        ⁢
        t
      
    
    =
    
      
        
          ∑
          p
        
        ⁢
        
          
            min
            q
          
          ⁢
          
            
              
              
                p
                -
                q
              
              
            
            2
            2
          
        
      
      +
      
        
          λ
          1
        
        ⁢
        
          
            ∑
            e
          
          ⁢
          
            
              
              
                e
                -
                
                  mean
                  ⁢
                  
                    
                  
                  ⁢
                  
                    (
                    e
                    )
                  
                
              
              
            
            2
            2
          
        
      
      +
      
        
          λ
          2
        
        ⁢
        
          
            ∑
            e
          
          ⁢
          e
        
      
    
  
  ,

 p is a vertex in the mesh model, q is a voxel of the surface of the segmentation mask of the pancreas, λ1=10−4,λ2=10−2, e=∥p−p′∥2, p′∈N(p), and N(p) are neighboring vertices of the vertex p.