Hillenbrand Claudia M, Elgort Daniel R, Wong Eddy Y, Reykowski Arne, Wacker Frank K, Lewin Jonathan S, Duerk Jeffrey L
Department of Radiology, University Hospitals of Cleveland, Cleveland, Ohio 44106, USA.
Magn Reson Med. 2004 Apr;51(4):668-75. doi: 10.1002/mrm.20050.
A novel two-element, catheter-based phased array coil was designed and built for both active MR device tracking and high-resolution vessel wall imaging. The device consists of two independent solenoid coils that are wound in opposite directions, connected to separate receive channels, and mounted collinearly on an angiographic catheter. The elements were used independently or together for tracking or imaging applications, respectively. The array's dual functionality was tested on a clinical 1.5 T MRI scanner in vitro, in vivo, and in situ. During real-time catheter tracking, each element gave rise to a high-amplitude peak in the respective projection data, which enabled reliable and robust device tracking as well as automated slice positioning. In vivo microimaging with 240 microm in-plane resolution was achieved in 9 s using the device and TrueFISP imaging. Therefore, a single device was successfully implemented that met the combined requirements of intravascular device tracking and imaging.
设计并制造了一种新型的基于导管的双元件相控阵线圈，用于有源磁共振设备跟踪和高分辨率血管壁成像。该设备由两个独立的螺线管线圈组成，它们以相反的方向缠绕，连接到单独的接收通道，并共线安装在血管造影导管上。这些元件分别独立使用或一起用于跟踪或成像应用。该阵列的双重功能在临床1.5T MRI扫描仪上进行了体外、体内和原位测试。在实时导管跟踪过程中，每个元件在各自的投影数据中产生一个高振幅峰值，这使得可靠而稳健的设备跟踪以及自动切片定位成为可能。使用该设备和TrueFISP成像，在9秒内实现了平面分辨率为240微米的体内显微成像。因此，成功实现了一种满足血管内设备跟踪和成像综合要求的单一设备。
