Method of generating a patient-specific bone shell

Abstract

The exemplary embodiments of the present disclosure are described and illustrated below to encompass methods and devices for designing patient specific prosthetic cutting jigs and, more specifically, to devices and methods for segmenting bone of the knee and the resulting cutting guides themselves. Moreover, the present disclosure relates to systems and methods for manufacturing customized surgical devices, more specifically, the present disclosure relates to automated systems and methods of arthroplasty cutting guides, systems and methods for image segmentation in generating computer models of knee joint.

1 . A method for generating a bone model from radiographic images comprising:
 obtaining a calibration target with at least one radio opaque member having a geometry with a recognizable orientation;   imaging a bone with the calibration target in a known pose;   recognizing the geometry by image processing of the imaging;   determining pose parameters from the geometry and the known pose; and   generating and outputting a bone contour from the imaging and the pose parameters.   
     
     
         2 . The method according to  claim 1 , further comprising coupling the calibration target to a patient's bone. 
     
     
         3 . The method according to  claim 1 , wherein image processing of the imaging of the bone with the calibration target in the known pose includes detecting the at least one radio opaque member. 
     
     
         4 . The method according to  claim 1 , wherein determining the pose parameters includes generating a three dimensional model including at least one three dimensional radio opaque member. 
     
     
         5 . The method according to  claim 4 , wherein determining the pose parameters further includes associating the geometry of each radio opaque member of the at least one radio opaque member with a corresponding three dimensional radio opaque member of the at least one three dimensional radio opaque member. 
     
     
         6 . The method according to  claim 4 , wherein determining the pose parameters further includes evaluating an accuracy of the three dimensional model based on associating the geometry of each radio opaque member of the at least one radio opaque member with a corresponding three dimensional radio opaque member of the at least one three dimensional radio opaque member. 
     
     
         7 . A method for generating a bone model from radiographic images comprising:
 imaging a bone with a calibration target in a known pose to generate image data, the calibration target including at least one radio opaque member having a geometry;   performing image processing on the image data;   based on the image processing, recognizing the geometry;   determining one or more pose parameters based on the recognized geometry and the known pose; and   generating a bone model including a bone contour of the bone based on the image data and the determined one or more pose parameters.   
     
     
         8 . The method according to  claim 7 , further comprising outputting an indication of the bone model. 
     
     
         9 . The method according to  claim 7 , further comprising receiving the calibration target. 
     
     
         10 . The method according to  claim 9 , the at least one radio opaque member includes multiple radio opaque members. 
     
     
         11 . The method according to  claim 9 , wherein the geometry of the at least one radio opaque member has a recognizable orientation. 
     
     
         12 . The method according to  claim 7 , further comprising coupling the calibration target to the bone. 
     
     
         13 . The method according to  claim 7 , further comprising detecting the at least one radio opaque member based on the image data. 
     
     
         14 . The method according to  claim 7 , further comprising generating at least one three dimensional radio opaque member based on the image data. 
     
     
         15 . The method according to  claim 14 , further comprising associating a first geometry of a first radio opaque member of the at least one radio opaque member with a first three dimensional radio opaque member of the at least one three dimensional radio opaque member. 
     
     
         16 . The method according to  claim 15 , wherein evaluating an accuracy of the first geometry associated with the first three dimensional radio opaque member. 
     
     
         17 . A method for generating a bone model from radiographic images, the method comprising:
 recognizing, based on radiographic image data of a bone with a calibration target in a known pose, a geometry associated with the calibration target having at least one radio opaque member;   determining one or more pose parameters based on the recognized geometry and the known pose;   generating a bone model including a bone contour of the bone based on the radiographic image data and the determined one or more pose parameters; and   outputting an indication of the bone model.   
     
     
         18 . The method according to  claim 17 , wherein the geometry corresponds to a position of a plurality of radio opaque members of the calibration target, the plurality of radio opaque members including the at least one radio opaque member. 
     
     
         19 . The method according to  claim 17 , wherein recognizing includes detecting the at least one radio opaque member and detecting less than all of a plurality of radio opaque members of the calibration target, the plurality of radio opaque members including the at least one radio opaque member. 
     
     
         20 . The method according to  claim 17 , wherein the geometry comprises a diameter of the at least one radio opaque member.