THE RF COIL AS A SENSITIVE MOTION DETECTOR FOR MAGNETIC-RESONANCE IMAGING
THE RF COIL AS A SENSITIVE MOTION DETECTOR FOR MAGNETIC-RESONANCE IMAGING
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DOI：
10.1016/0730-725x(88)90403-1
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发表时间：
1988-05-01
影响因子：
2.5
通讯作者：
ROSCHMANN, P
中科院分区：
文献类型：
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作者：
BUIKMAN, D;HELZEL, T;ROSCHMANN, P
一种用于磁共振成像中检测患者运动的新型传感器原理已成功地应用于减少运动伪影。它使用了一种已经存在于每个MRI系统中的设备，即射频线圈。患者在线圈内的运动引起线圈射频阻抗匹配的变化，这可以通过反射射频功率的变化来测量。介绍了用于检测呼吸和心脏运动的原理，并给出了几种线圈布置的实验结果。本文给出了2特斯拉全身MRI系统射频体线圈的呼吸门控图像。
A new sensor principle for detection of patient movement in magnetic resonance imaging has been successfully applied for the reduction of motion artifacts. It uses a device that is already present in every MRI system, namely the rf coil. Patient movement within the coil causes changes in the rf impedance match of the coil, which can be measured as variations in the reflected rf power. The principle used for the detection of respiratory and cardiac motion is described, and experimental results measured with several coil arrangements are given. Images are presented which were acquired with respiratory gating derived from the rf body coil of a 2 Tesla whole body MRI system.