Estimation method of three-dimensional position of guidewire and quantitative index to determine adequate guidewire-operation

2021 Fiscal Year Final Research Report

• Project/Area Number: 19K12843
• Research Category: Grant-in-Aid for Scientific Research (C)
• Allocation Type: Multi-year Fund
• Section: 一般
• Review Section: Basic Section 90130:Medical systems-related
• Research Institution: Yamaguchi University
• Principal Investigator: MORI Koji 山口大学, 大学院創成科学研究科, 准教授 (40346573)
• Project Period (FY): 2019-04-01 – 2022-03-31
• Keywords: 血管内治療 / ３次元位置推定 / 再構築 / 応答性

Outline of Final Research Achievements

We proposed a method to estimate the 3D composition of the intravascular guide wire from a single X-ray image during endovascular treatment. This project aims to quantify the estimation accuracy and develop indicators to determine the proper operation (push / draw and rotation) of the treatment device. The accuracy was shown to be about 0.3 mm when compared to the theoretical device configuration calculated from numerical simulations. In addition, the ratio of device tip translation to the amount of operation given to the device was defined as responsiveness. The relationship between responsiveness and vessel shape was investigated. Responsiveness was shown to be inversely proportional to the radius of curvature of the blood vessel. The results showed that when the responsiveness exceeds a threshold, the device needed to be rotated in the curved region of the vessel.

Free Research Field

医用工学

Academic Significance and Societal Importance of the Research Achievements

本研究課題では，血管内治療中のX線画像から血管内治療デバイスの３次元形状を推定できることを示した，さらにデバイス先端位置と手元操作量の比率である応答性という指標を提案し，その指標が事故の起きやすい血管屈曲部では大きくなることを示した．これらを組み合わせれば，血管内治療中のデバイス先端位置を推定し，それの応答性が大きくなり始めるときは，デバイスの押す操作を中止し，回転操作を加えるべきである合図を術者に示すことができる．これを利用すれば経験の浅い術者でも安全に治療を遂行することが可能になる．血管内治療をより安全に実施できるナビゲーション装置の開発などに発展させられると考えている．