Surface matching calculation method for target positioning of surgical instrument

Abstract

The invention discloses a surface matching calculation method for target positioning of a surgical instrument, which is characterized in that a two-dimensional marking target is mounted on the surgical instrument, and model description of the two-dimensional marking target is established to realize real-time retrieval of scene point pair features, so that the problem of low real-time search efficiency of a depth image in a traditional method is solved, and the real-time search efficiency of the surgical instrument is improved. Meanwhile, due to the diversity of three-dimensional data acquisition templates and scenes, the method can be not limited to a common free form, the application range of the surgical instrument positioning technology is widened, the pose precision of the two-dimensional marking target center point is further improved by adopting a pose filtering and iteration nearest point method, and the accuracy of the two-dimensional marking target center point is improved. The method can avoid the influence of magnetic interference substances on the positioning accuracy, remarkably improves the tracking capability and precision of the tip of the surgical instrument, enlarges the field of view of a doctor in an operation, needs less calculation time, and is suitable for a real-time environment.

Description

technical field [0001] The invention relates to the field of communications, in particular to a surface matching calculation method for target positioning of surgical instruments. Background technique [0002] Traditional surgical operations, both in preoperative surgical planning and intraoperative surgical implementation, rely on the doctor's clinical experience of familiarity with and grasp of the diseased part. It is opaque, and doctors can only perform surgery according to the pathological characteristics of the patient's diseased part, which makes the surgical process complicated, the surgical trauma is large and the recovery time after surgery is long. The crux of the problem lies in accurately placing the interventional surgical tool on the surgical target position through the puncture operation. However, the traditional image-guided operation has the following problems: 1. Physicians are required to perform a lot of practice and practical exercises, and young physic...

AI Technical Summary

Problems solved by technology

[0007] Aiming at the problem that the existing surgical instrument positioning device and method are easily affected by the environment, the present invention proposes a surface matching calculation method for surgical instrument target positioning, which includes the following steps:

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