Iwasaki S, Nakagawa H, Uchida H, Fukuzumi A, Otsuji H, Kichikawa K, Watabe Y, Kitamura K, Tsushima J, Hirohashi S
Department of Radiology, Nara Medical University, Japan.
Radiat Med. 1990 Jan-Feb;8(1):13-6.
Standard spin echo sequences of MRI with and without motion artifact suppression technique (MAST) were compared in 45 paired images of brain and 21 paired images of spine. The images were obtained on a Picker 1.5 T system with TR = 2 sec and TE = 100 or 120 msec. MAST is a method of refocusing transverse magnetization at echo time by modification of the gradient waveforms. Transverse, coronal, and sagittal planes of brain were compared in 10 paired images obtained from adults and five paired images from children. The spine was studied in sagittal images, 11 cervical images of adults, five lumbar images of adults, and five lumbar images of children. MAST was proven to be valuable not only for the detection of lesions but also for picturing anatomical details as in MR-cisternography and MR-myelography and the effects of iron ions. MAST improves significantly the quality of T2-weighted images, especially in children.
在45对脑部图像和21对脊柱图像中，对采用和未采用运动伪影抑制技术（MAST）的MRI标准自旋回波序列进行了比较。图像在Picker 1.5 T系统上获取，重复时间（TR）= 2秒，回波时间（TE）= 100或120毫秒。MAST是一种通过修改梯度波形在回波时间重新聚焦横向磁化的方法。在从成人获取的10对图像和从儿童获取的5对图像中，对脑部的横断面、冠状面和矢状面进行了比较。对脊柱的矢状面图像进行了研究，包括11张成人颈椎图像、5张成人腰椎图像和5张儿童腰椎图像。事实证明，MAST不仅对病变的检测有价值，而且对于像磁共振脑池造影和磁共振脊髓造影中显示解剖细节以及铁离子的影响也很有价值。MAST显著提高了T2加权图像的质量，尤其是在儿童中。
