0.2T磁共振成像系统的主动磁共振跟踪系统：初步报告——介入性磁共振成像中的实时位置跟踪

[Active MR tracking system at 0.2T MR, a preliminary report: real time position tracking on interventional MR].

作者信息

Aoki S, Nanbu A, Araki T, Shimazu N, Ichikawa T, Kumagai H, Kachi K, Araki T

机构信息

Department of Radiology, Yamanashi Medical University.

出版信息

Nihon Igaku Hoshasen Gakkai Zasshi. 1997 Nov;57(13):877-9.

PMID:9423317

Abstract

An active MR tracking system was installed in a 0.2 T open-type MRI. Interventional devices with a receive-only microcoil at their tips were newly developed for tracking at 0.2T. The low signal-to-noise ratio at 0.2T required the microcoils to have a diameter of about 2 mm and 20 turns for stable tracking. Simulation of MR-guided biopsy using biplane images with tracking in the gelatin phantom was performed. MR tracking in the aorta and IVC of a dog by a catheter with a microcoil at its tip was successful.

摘要

一个有源磁共振跟踪系统被安装在一台0.2T开放式磁共振成像仪中。新开发了尖端带有仅用于接收的微线圈的介入装置，用于在0.2T场强下进行跟踪。0.2T场强下的低信噪比要求微线圈直径约为2mm且有20匝以实现稳定跟踪。利用双平面图像在明胶模型中进行跟踪，对磁共振引导活检进行了模拟。通过尖端带有微线圈的导管在犬的主动脉和下腔静脉中成功进行了磁共振跟踪。