On the cause of spatial displacement of long T1 species in segmented inversion recovery prepared imaging
On the cause of spatial displacement of long T1 species in segmented inversion recovery prepared imaging
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DOI：
10.1002/mrm.20566
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发表时间：
2005-08-01
影响因子：
3.3
通讯作者：
Reichek, N
中科院分区：
文献类型：
--
作者：
Goldfarb, JW;Arnold, S;Reichek, N
利用倒置恢复稳态自由进动分段k空间成像检测心肌梗死，我们注意到一些结构出现在图像的错误位置。在这项工作中，从理论和实验两个角度对空间位移进行了论证和解释。这种影响是由于检测到的具有长T-1‘S的物种(如包囊、液体收集和脑脊液)的磁化强度的一段又一段的相位变化。根据k空间段的数量和视图排序，结构可以在整个图像中复制或移位相位编码视场的一半。
Using inversion recovery steady-state free precession segmented k-space imaging for the detection of myocardial infarction, we noticed that some structures appeared in the wrong locations of the image. In this work, the spatial displacement is demonstrated and explained from both theoretical and experimental points of view. The effect is due to a change in phase from segment to segment of the detected magnetization from species with long T-1's such as cysts, fluid collections, and cerebrospinal fluid. Depending on the number of k-space segments and view ordering, structures can be replicated throughout the image or displaced by half of the phase-encoding field of view.