Forty-millisecond MR imaging of the abdomen at 2.0 T.
Forty-millisecond MR imaging of the abdomen at 2.0 T.
复制标题
2.0 T 下的 40 毫秒腹部 MR 成像。
DOI：
10.1148/radiology.173.1.2780996
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发表时间：
1989
期刊：
影响因子：
19.7
通讯作者：
Ferrucci,JT
中科院分区：
文献类型：
--
作者：
Saini,S;Stark,DD;Rzedzian,RR;Pykett,IL;Rummeny,E;Hahn,PF;Wittenberg,J;Ferrucci,JT
研究了超快磁共振(MR)成像技术提供无运动伪影的腹部MR图像的能力。在2.0T下运行的全身系统上，在短短40毫秒内获得单独的T2加权横断磁共振图像，临床评估采用脂肪抑制图像，其中只有水分子的质子对图像信号强度有贡献。在22例患者和2名健康志愿者中，超快MR图像与0.6T下获得的常规MR图像进行了比较，超快图像具有诊断质量和无运动伪影。在回声时间(TE)为30毫秒(成像时间为40毫秒)时获得的图像的肝脏信噪比为56.3+/-22.6(n=19)。由于数据矩阵较小，超快磁共振图像的软组织界面不如那些没有运动伪影的最高质量的传统磁共振图像清晰。然而，超快磁共振成像显示高T2依赖的软组织对比度，两种成像技术都很容易发现病理解剖和正常解剖。这种超快成像技术在全身磁共振成像中有着重要的应用前景，在这种成像中，运动伪影往往会降低图像质量。
The ability of an ultrafast magnetic resonance (MR) imaging technique to provide abdominal MR images free of motion artifacts was studied. Individual T2-weighted transverse MR images were acquired in as little as 40 msec on a whole-body system operating at 2.0 T. Clinical evaluation was undertaken with fat-suppressed images in which only protons of water molecules contributed to image signal intensity. The ultrafast MR images were compared with conventional MR images obtained at 0.6 T. In 22 patients and two healthy volunteers, ultrafast MR images were of diagnostic quality and free of motion artifacts. Images obtained at an echo time (TE) of 30 msec (imaging time, 40 msec) had liver signal-to-noise ratios of 56.3 +/- 22.6 (n = 19). Because of a smaller data matrix, ultrafast MR images had soft-tissue interfaces that were less sharp than those of the highest-quality conventional MR images in which no motion artifacts were present. However, ultrafast MR images demonstrated high T2-dependent soft-tissue contrast, and pathologic and normal anatomies were readily detected with both imaging techniques. This ultrafast imaging technique has significant promise in whole-body MR imaging, in which motion artifacts often degrade image quality.