Rapid construction method and system for personalized knee joint prosthesis model

Abstract

The invention discloses a rapid construction method and system for a personalized knee joint prosthesis model, and the method comprises the steps: carrying out the preprocessing of all CT images, obtaining a denoised binary image, and carrying out the surface drawing reconstruction based on the binary image, and obtaining a plurality of knee joint overall models; cutting the separated thighbone model and the separated tibia model at the required fixed length respectively; all the health models in the thighbone model and the tibia model are approximately overlapped in a registration mode, retention adjustment is conducted on the basis of a set retention ratio threshold value, an average thighbone model and an average tibia model which do not contain any health individual case characteristics are obtained, and the average thighbone model close to the size of a case and the thighbone model of the case are subjected to registration alignment; displaying and analyzing the illness state of the case, determining a diseased part needing to be cut off in the case thighbone model and cutting off the diseased area, performing cutting operation on the same position on the average thighbone model, and correcting the meniscus part in the prosthesis model by combining the accurate position of the thighbone model at each flexion and extension angle to obtain a meniscus prosthesis model; therefore, a knee joint prosthesis model conforming to human motion characteristics at each flexion and extension angle is obtained.

Description

technical field [0001] The invention relates to the field of medical treatment, in particular to a method and system for quickly constructing a personalized knee joint prosthesis model. Background technique [0002] With the development of economy and progress of society, human beings urgently need safer, faster, more accurate and more humanized medical services. For this reason, fully paying attention to the individual differences of patients, combined with advanced graphics and image processing technology, to carry out personalized and precise medical design has become an important scientific research direction at present. The knee joint is the largest joint in the human body with the most complex structure and more chances of injury. Knee joint injuries will seriously affect people's normal life. At present, the most common treatment for severe knee injuries is total knee replacement, which uses artificial knee prosthesis to replace the biomechanical function of the orig...

AI Technical Summary

Problems solved by technology

A large number of total knee prostheses are needed every year in the world, but affected by genetic factors, living habits and working environment, each patient's bone morphology has great individual differences, so patients expect accurate total knee replacement surgery It is getting stronger and stronger, and the common part-based prosthesis is difficult to adapt to the individual requirements of different patients, so the design of total knee replacement prosthesis is bound to develop in the direction of tailor-made

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