Leg-bone lower limb force line automatic detection method and device

Abstract

Provided is a leg-bone lower limb force line automatic detection method. The leg-bone lower limb force line automatic detection method includes the steps of: (1), acquiring CT image data; (2), conducting segmentation and three-dimensional reconstruction on bones of a patient in CT images; (3), regarding a femur three-dimensional model, through a method of using double section planes for acquiringmass centers, determining the positions of femoral head sphere center points; (4), regarding the femur three-dimensional model and a tibia three-dimensional model, by adopting a rigidity and elasticity integrated registration method, acquiring coordinates of knee-joint intercondylar concave center points, tibial plateau center points and ankle-joint center points; (5), through connection lines between femoral head sphere centers and the knee-joint intercondylar concave center points, obtaining femur mechanical axes, and through connection lines between the tibial plateau center points and theankle-joint center points, obtaining tibia mechanical axes; and (6), regarding the femur three-dimensional model or the tibia three-dimensional model, by adopting a method of using iteration for searching for maximum distance points, determining anatomy axes of femurs or tibias. A leg-bone lower limb force line automatic detection device is also disclosed.

Description

technical field [0001] The invention relates to the technical field of medical image processing, in particular to an automatic detection method for the force line of the lower limb of the leg bone and an automatic detection device for the force line of the lower limb of the leg bone. Background technique [0002] Artificial hip and knee replacement is currently the most effective means of treating end-stage bone diseases such as osteoarthritis, severe rheumatoid arthritis, and cartilage destruction. As my country has gradually entered an aging society, the volume of artificial hip and knee replacements has grown rapidly, and the market share of joint replacement surgery has grown rapidly. [0003] The success of hip and knee replacement surgery is inseparable from the effective detection of force lines. Accurately finding the force lines of the lower limbs is the basis for ensuring the success of the entire operation. The lower extremity line of force includes the femoral a...

AI Technical Summary

Problems solved by technology

The routine way for doctors to determine the anatomical axis and mechanical axis is to connect selected points on the patient's X-ray film. This way of determining the anatomical axis and mechanical axis is heavily dependent on the operator's experience and has poor reliability, which has become an important factor restricting the effect of surgery.

Images