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

Claim 15:
16. The device according to claim 14, wherein when gradually deforming the initial mesh model to fit the surface of the segmentation mask of the pancreas of the patient to preserve the anatomy of the pancreas of the patient, the processor is configured to:
guide 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.