Real-time imaging contrast method of C-arm X-ray film machine based on 3D model

The invention discloses a real-time imaging contrast method of a C-arm X-ray film machine based on a 3D model, which belongs to the technical field of picture processing. According to the invention, the 3D model of a prosthesis at a hip replacement surgery site is constructed, during a surgery, a position sensing device is used to determine a deflection angle. According to the obtained deflectionangle, a corresponding control prosthesis implant picture matching a current surgical angle is obtained by projection, the picture is used as the contrast of the image formed during the placement of the prosthesis during the surgery to confirm the accuracy of the placement of the prosthesis and the deviation angle, the technical problem of low imaging accuracy of the C-arm X-ray film machine is solved, The 3D model constructed by the present invention can adapt to various situations during the surgery, and obtained corresponding projection maps according to different deflection angles can be used as surgical comparison, which can ensure accuracy and reduce risk. The invention uses a projection function to attenuate a voxel matrix, which can simultaneously obtain the surface and internal information of the 3D model, and is convenient for judging the direction of implant.