Aoki S, Nanbu A, Araki T, Ma X, Araki T, Kumagai H, Dumoulin C L, Darrow R D, Shimazu N, Tsukamoto T, Moriya H, Nakajima H
Department of Radiology, Yamanashi Medical University, Nakakoma-gun, Japan.
Radiat Med. 1999 May-Jun;17(3):251-7.
An active MR tracking system was implemented on a 0.2 Tesla open MRI system. Interventional devices with receive-only microcoils at their tips were developed and investigated on the scanner. Microcoils having a diameter of about 1 mm and 20 turns were found to provide sufficient signal-to-noise ratios for stable tracking. Positional accuracy and precision were found to be acceptable under practical conditions. Simulation of MR-guided biopsy using biplane images with tracking was performed in a gelatin phantom and dog livers. Successful tracking of catheters with integrated microcoils was also demonstrated in the aorta and IVC of live dogs.
在一台0.2特斯拉的开放式磁共振成像（MRI）系统上实现了一个有源磁共振跟踪系统。研发了在尖端带有仅用于接收的微线圈的介入设备，并在该扫描仪上进行了研究。发现直径约为1毫米且有20匝的微线圈能提供足够的信噪比以实现稳定跟踪。在实际条件下，位置准确性和精度被认为是可接受的。在明胶模型和犬肝脏中利用带有跟踪功能的双平面图像进行了磁共振引导活检的模拟。在活体犬的主动脉和下腔静脉中也成功演示了对带有集成微线圈的导管的跟踪。
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