Method for automatically identifying position of guide pin in X-ray perspective image

Abstract

The invention relates to a method for automatically identifying the position of a guide pin in an X-ray perspective image. The method includes acquiring an image contour of the X-ray perspective image, detecting line segments in the image contour through a probability Hough transform algorithm, subsequently identifying a pair of line segments, which are parallel or approximately parallel, at the edges of two sides of the guide pin or a sleeve placed in a bone surface among the detected line segments, and drawing an extension line of the sleeve or the guide pin in the X-ray perspective image according to a center line of the pair of line segments so as to achieve automatic identification of the position of the guide pin in the X-ray perspective image. The method for automatically identifying the position of the guide pin in the X-ray perspective image is capable of obviously reducing exposure time of X-rays, remarkably shortening operation time, reducing secondary damages to patients, improving positioning accuracy of the operation guide pin, and improving operation efficiency.

Description

technical field [0001] The invention relates to the technical field of image processing, in particular to a method for automatically identifying the position of a guide pin in an X-ray fluoroscopy image during orthopedic minimally invasive surgery. Background technique [0002] Since Wickham, a British surgeon, first proposed the concept of "Minimally Invasive Surgery (MIS)" in 1983, the application of minimally invasive technology and theory in orthopedics has continued to mature and become an important direction for the development of modern orthopedics. Whether a hospital's orthopedics department has a minimally invasive orthopedics department, and whether the field covered by minimally invasive technology is comprehensive are the yardsticks to measure the core competitiveness of the hospital or discipline. Minimally invasive refers to minimal damage, a new surgical technique that achieves surgical efficacy with minimal invasion and minimal physiological interference. It...

AI Technical Summary

Problems solved by technology

Because before the guide wire is inserted, the human eye cannot Figure 1a The shown fluoroscopic image accurately predicts the position of the guide wire, so it usually needs repeated verification and adjustment many times during the insertion of the guide wire to ensure that the insertion position is accurate, which seriously increases the X-ray exposure time

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