Laparoscope naked eye simulation reality method

A technology that simulates reality and laparoscopy, applied in neural learning methods, 3D modeling, biological neural network models, etc. device, etc.

Pending Publication Date: 2021-03-19
苏州普瑞斯仁信息科技有限公司
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  • Summary
  • Abstract
  • Description
  • Claims
  • Application Information

AI Technical Summary

Problems solved by technology

This method overcomes the limitations of 3D laparoscopy and existing medical imaging technology when facing internal abdominal visceral surgery, such as liver, kidney or colorectal tumor resection. Inflation pressure, respiratory movement, and instrument pulling, pressing, cutting, and many other external factors interact with each other, and the important internal anatomical structures of the organs will deform in real time. Even with the preoperative CT / MRI structural image auxiliary reference, the surgeon still has no way to perceive the organs Changes in the position of important internal anatomical structures make it impossible to accurately implement difficult operations such as avoidance and protection of important blood vessels, tissues, and nerves

Method used

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Examples

Experimental program
Comparison scheme
Effect test

Embodiment 1

[0049] The complete organ finite element model is built. On the basis of the virtual 3D model of the organ constructed in step (3), smoothing, patch optimization, and patch reduction are performed to improve the accuracy and convergence speed of the later finite element analysis.

[0050] Aiming at the internal main structure of the organ body model, a special fixture is designed, and a biomechanical test platform is built on the basis of a high-precision tensile testing machine and a six-dimensional force / torque sensor to carry out stress and tension experiments on the internal main structure of the organ body model, Stress relaxation test and cutting test. By analyzing the experimental data, the Mooney-Rivlin hyperelastic parameters, Maxwell viscoelastic parameters, and Poisson's ratio and other mechanical parameters of the organ model tissue are obtained. For regions composed of different organs and different tissues, different biomechanical material properties are assigned ...

Embodiment 2

[0053] Complete organ body model finite element model simulation, carry out the deformation experiment of the organ body model under the influence of external factors such as inflation pressure, breathing movement, and surgical instrument pulling, pressing and cutting, and determine the interaction force between different factors and organs and tissues to set the force threshold for contact collision and rupture. Based on the surgical force response, the contact position, contact initiation time, and rupture time of the surgical instrument and the physical model are detected. For special surgical instruments, such as ultrasonic scalpel and electrocoagulation scalpel, the contact problem is determined by the movement displacement of the instrument.

[0054] The soft tissue of the organ will deform or rupture under load, and the core of the rupture problem is to determine the failure criteria of different organ tissues. The present invention intends to study the tissue failure ...

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Abstract

The invention discloses a laparoscope naked eye simulation reality method, which comprises a naked eye simulation reality system for accurately guiding a laparoscope in an organ body model, and consists of a 3D laparoscope, a graphic workstation and naked eye 3D display equipment, according to the laparoscope simulation reality, mapping from a virtual image to a deformed reality scene is achievedthrough spatial registration of a virtual 3D model of an organ anatomical structure reconstructed in a preoperative CT / MRI structure image and an organ real surface collected from a laparoscope image,media-free output to naked eye 3D display is achieved at two visual angles of a 3D laparoscope, and simulation reality display is achieved. The operator is guided to finish the refined laparoscopic surgery.

Description

technical field [0001] The invention relates to a laparoscopic naked-eye simulation reality method, in particular to a fusion display method of a preoperative structural image and an intraoperative real laparoscopic image, and belongs to the artificial reality simulation field. Background technique [0002] Augmented reality (Augmented Reality, AR) is a display technology that superimposes computer-generated virtual scenes on real scenes in real time. The Laparoscopic Augmented Reality (LAR) technology combining AR and 3D laparoscopy is to reconstruct the anatomical structure marked on preoperative CT or MRI structural images into a virtual 3D model and superimpose it on the laparoscopic field of view in real time, so as to surpass the real The laparoscopic field of view enhances the display of surgical target information, guides the operator to judge the cutting direction and depth, and provides a solution for the perspective display of the internal anatomical structure of ...

Claims

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Application Information

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Patent Type & Authority Applications(China)
IPC IPC(8): G06F30/23G06T17/20G06T19/00G06N3/08G06N3/04G06F119/14
CPCG06F30/23G06T17/20G06T19/006G06N3/08G06F2119/14G06N3/044
Inventor 高欣夏威张家意
Owner 苏州普瑞斯仁信息科技有限公司
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