Method and system for determining feedback force in virtual cardiovascular interventional surgery training system

Abstract

The invention discloses a method and system for determining a feedback force in a virtual cardiovascular interventional operation training system. The method includes the following steps that: displacement trajectory segments of a guide wire, topologic information of inner elements of the tetrahedral meshes of a blood vessel, and associated information of the triangular patches of the inner wall of the blood vessel and a space bounding box are obtained; based on the above results, whether the guide wire and the blood vessel collide is judged; if the guide wire and the blood vessel collide, the coordinates of a collision point and the coordinates of a force sense interaction device of a guide wire node are determined; and a virtual feedback force between the guide wire and the blood vessel is determined according to the coordinates of the collision point and the coordinates of the force sense interaction device of the guide wire node. With the method and system provided by the embodiments of the invention adopted, technical problems in accurately determining a virtual feedback force between a guide wire and a blood vessel in real time can be solved.

Description

technical field [0001] Embodiments of the present invention relate to the technical field of cardiovascular intervention, in particular to a method and system for determining feedback force in a virtual cardiovascular interventional surgery training system. Background technique [0002] According to the survey and statistics of the World Health Organization, cardiovascular disease is the first "killer" of human disease death, and more than 3 million patients die of such diseases in my country every year. Actively carrying out cardiovascular interventional surgery can significantly reduce the mortality and disability rate. The procedure of cardiovascular interventional surgery is as follows: the doctor cuts a small incision in the patient's femoral artery, then inserts the guide wire into the blood vessel, and under the guidance of the digital subtraction angiography imaging system (Digital Subtraction Angiography, DSA for short), manipulates the guide wire in the human blood...

AI Technical Summary

Problems solved by technology

However, the above three methods have limitations

First, animal experiments are expensive, resulting in high training costs; second, the vascular model and human vascular tissue are quite different, and the reality and effectiveness of training are unsatisfactory; finally, the risk of training in clinical operations on patients is high large, and the trainees are also exposed to long-term radiation, with the improvement of the medical system and technological progress, this method will gradually be eliminated

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