Method for simulating soft tissue surgery path planning through implicit surface algorithm

Abstract

The invention relates to a method for simulating soft tissue surgery path planning through an implicit surface algorithm. The method comprises the steps of S1, acquiring medical image data of a specific case soft tissue part; S2, establishing a three-dimensional geometric model; S3, acquiring instrument characteristic data of a resection surgery; S4, based on man-machine interaction interface designing, performing tracking and positioning on operation of a surgery instrument entity or model of a soft tissue resection surgery, calculating a relative position of the surgery instrument entity ormodel to a dissecting model, and detecting a resection instrument operation amount at each time; S5, based on the implicit surface algorithm, applying an operation amount on the soft tissue model, andcalculating an action amount which corresponds with the current operation amount according to an instrument characteristic, wherein the action amount comprises an effective ablation area and an ablation contour of an ultrasonic knife to the tissue; and S6, according to the calculated action amount, editing and modifying a tissue model, and displaying dynamic changes which comprises in-surgery cutting path extension and wound boundary contour expansion. The method can ensure a user of more comprehensive and true before-surgery simulated experience.

Description

technical field [0001] The invention relates to a method for simulating and simulating soft tissue surgery path planning using an implicit surface algorithm, and belongs to the technical field of computer surgery simulation. Background technique [0002] The close prior art involved in the present invention is as follows: [0003] 1. The prostate minimally invasive surgery simulator developed by the inventor Shen Yunhe [1,2]. [0004] 2. Canadian National Research Council (NRC) Brain Surgery Simulator: Brain Surgery Simulator (2012 paper report mentioned a method similar to 1) [3] [0005] 3. Orthopedics or dentistry and other skeletal surgery simulation [4]: ​​similar to 1. [0006] 4. Liver surgery planning system at the University of Tsukuba, Japan: old method, same field, same surgery [5–7]. [0007] 5. Liver resection surgery simulation technology of European INRIA Institute: old method, same surgery simulation [8,9]. [0008] 6. The prostate surgery simulator of th...

AI Technical Summary

Problems solved by technology

[0037] Defects of the existing technology: the keyboard and mouse operation interface used by traditional surgical planning software has poor applicability and has no similarity with the actual operation interface

Progressive, arbitrary, and repeated surgical operations are continuously subdivided in the local part of the model to form an intricate structure, which increases the error rate of the explicit algorithm, reduces reliability, and makes it difficult to control the complexity of the cut plane boundary

[0040] The grid modeling of a specific case is inefficient, the process is complicated, it cannot be completed automatically, and it takes a long time

The process of establishing a dynamic simulation model of a virtual patient's organs and tissues in a surgical simulator is more complicated

These two main technical difficulties restrict the feasibility and practicability of the idea of ​​using surgical simulation simulator as a surgical planning system

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