Method and device for arthroscopically measuring intra-articular structure

Abstract

The invention discloses a method and device for arthroscopically measuring an intra-articular structure. The method comprises the following steps of obtaining a target image with an arthroscope reaching inside a joint when triggering operation on image shooting is detected, wherein the target image comprises an intra-articular lesion or defect site and a measuring scale which is arranged nearby the intra-articular lesion or defect site; displaying the target image; calculating a display scale of the target image according to an pixel distance indicated in the target image with the measuring scale and an actual distance indicated with the measuring scale; determining a contour line of the intra-articular lesion or defect site according to point tracing operation on the profile of the intra-articular lesion or defect site; calculating the actual distance between any two points on the contour line of the intra-articular lesion or defect site and / or the area of the intra-articular lesion or defect site according to the contour line of the intra-articular lesion or defect site and the display scale. For a joint injury in an irregular shape, the method enables a graft to be matched with the joint injury accurately.

Description

technical field [0001] The invention relates to the technical field of arthroscopic measurement, in particular to a method and device for arthroscopically measuring intra-articular structures. Background technique [0002] Arthroscopy is a rod-shaped optical instrument with a diameter of about 5mm for observing the internal structure of joints. It is an endoscope used for diagnosis and treatment of joint diseases. The basic structure of an arthroscope is an optical system, with a rod mirror system for collecting images in the center, an optical fiber for introducing light sources around it, and a metal protective sheath outside. Arthroscopy is a group of photoelectric instruments that reflect the situation in the joint, consisting of an arthroscope lens, a camera, a host, a display, and a cold light source. The lens of the arthroscope is a thin rod with a length of more than 20 cm and a thickness of 4-5 mm, which is used to insert into the joint cavity. The rod contains a s...

AI Technical Summary

Problems solved by technology

[0011] The present invention provides a method and device for measuring the intra-articular structure under arthroscopy, which is used to solve the problems in the prior art that either the measurement error of joint damage, that is, the defect site of intra-articular lesions is large, the matching between the graft and the damage is poor, or in order to achieve The mold is precisely matched to the damage, and the shape of the joint damage is trimmed to aggravate the damage problem

Images