Puncture navigation method for CT guided liver tumor radiofrequency ablation

Abstract

The invention discloses a puncture navigation method for CT guided liver tumor radiofrequency ablation. The method comprises the steps that markers which can be identified by CT are placed on the bodysurface of a patient suffered from liver tumor, and three-dimensional structures of the liver tumor, liver and key dissection structures (great vessels, lung, heart, stomach, kidney, gallbladder, skin and skeleton) are automatically and rapidly extracted from CT sequence scanning images in the CT guided liver tumor radiofrequency ablation; real-time automatic planning of puncture routes is conducted to obtain the optimal puncture route; spatial matching is conducted on a patient coordinate system P, a CT image coordinate system I and an electromagnetic positioning instrument coordinate systemE; information of the starting point, ending point, length, angle and the like of the optimal puncture route is displayed in CT image space; the moving of needle tip of an ablation needle is executedto reach the starting point of the optimal puncture route to conduct real-time navigation; after the needle tip of the ablation needle is moved to the starting point of the optimal puncture route, real-time navigation of the puncturing of the ablation needle is executed.

Description

technical field [0001] The invention belongs to the technical field of image processing, in particular to a puncture navigation method in CT-guided radiofrequency ablation of liver tumors. Background technique [0002] CT (Computed Tomography, computerized tomography imaging) guided radiofrequency ablation has been applied in the minimally invasive treatment of clinical liver tumors. CT guided radiofrequency ablation of liver tumors is to insert radiofrequency electrodes (ablation needles) into liver tumors under the guidance of CT images. As a heat source, the center heats the tumor tissue to a higher temperature within a certain period of time to achieve complete coagulation and necrosis of the tumor immediately, thereby directly killing the tumor in situ. Ensuring that the needle tip of the ablation needle accurately penetrates into the internal target of the tumor is a key link in CT-guided radiofrequency ablation of liver tumors, which directly affects the therapeutic e...

AI Technical Summary

Problems solved by technology

Ensuring that the needle tip of the ablation needle accurately penetrates into the internal target of the tumor is a key link in CT-guided radiofrequency ablation of liver tumors, which directly affects the therapeutic effect. The needle insertion position, puncture path and depth are mainly determined by the doctor's experience, which puts forward the demand for real-time automatic puncture navigation during surgery, but the existing radiofrequency ablation puncture navigation technology has shortcomings in automatic, real-time and intraoperative planning

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