Measuring method of median load-bearing arc angle of hip joint

Abstract

The invention discloses a method for measuring a hip joint by using a multi-row spiral CT (Computerized Tomography) three dimensional reconstruction technology, and particularly discloses a method for measuring a midst load bearing arc angle of a hip joint. The method comprises the following steps of: (1) arranging a target to be measured; (2) performing CT scanning and three-dimensional reconstruction; and (3) acquiring a definition line of the midst load bearing arc angle, adjusting a three-dimensional image of the hip joint to a side position image, removing a front side image of the entire hip joint by cutting along the middle axis of a femoral neck, adjusting the three-dimensional image of the hip joint to a positive position image, drawing a circle by fitting a femoral head joint surface, making a horizontal diameter by passing through a circle center point and connecting an outer edge point of an acetabular bone with the circle center point, wherein intersection points between the horizontal diameter and the circuit are points A and B, the point B is an inner side intersection point; an intersection point between the connecting line and the circuit is a point E, and an included angle between radiuses ED and BD is the resolved midst load bearing arc angle of the hip joint. According to the method for measuring the midst load bearing arc angle of the hip joint, the technical defects of load bearing measuring middle parameters in the prior art are overcome, and easy measurement of load bearing stable form parameters of the hip joint is realized.

Description

technical field [0001] The invention relates to a method for measuring hip joints in orthopedic medicine, in particular to a method for measuring hip joints by using multi-slice spiral CT three-dimensional reconstruction technology. Background technique [0002] Hip joint measurement refers to the measurement of hip joint morphological parameters. Hip joint morphological parameters (parameters related to weight-bearing relationship are especially important) are important indicators for hip prosthesis design and prosthesis selection. [0003] When designing or selecting hip prosthesis or related prostheses, it is impossible to use stereo imaging of the entire hip joint as an index, which will lead to unclear indicators and difficult operation. In the actual design and selection process, several hip joints are often selected Parameters related to joint load-bearing and stability were used as the main indicators. [0004] The current evaluation parameters of the hip include CE...

AI Technical Summary

Problems solved by technology

CE angle and acetabular depth are often used together, and are mainly used to evaluate the degree of development of the acetabulum, and cannot directly evaluate the vertical force of the hip joint, that is, the stability of the normal load-bearing state; the comprehensive index Z can evaluate the stability of the hip joint, However, to obtain the value of the composite index Z, it is necessary to measure the femoral head index and the femoral head and acetabular index first. The measurement process involves many intermediate parameters, which will increase the difficulty of measurement accordingly.

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