MULTIPLE INVERSION RECOVERY REDUCES STATIC TISSUE SIGNAL IN ANGIOGRAMS
MULTIPLE INVERSION RECOVERY REDUCES STATIC TISSUE SIGNAL IN ANGIOGRAMS
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DOI：
10.1002/mrm.1910180202
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发表时间：
1991-04-01
影响因子：
3.3
通讯作者：
STOMP, GP
中科院分区：
文献类型：
--
作者：
DIXON, WT;SARDASHTI, M;STOMP, GP
自旋标记血管造影通过减影比较两个图像。第一个是在一个区域中的血液通过反转标记并流入感兴趣区域之后获得的。标记不用于第二幅图像，因此在减影后，只有标记的血液保留在最终血管造影片中。这种减法从来都不是完美的，但是在起始图像包含较少的静态组织信号的情况下，可以减少剩余的背景。这可以通过在反转之后的零交叉处进行观察来实现。多重反转允许同时消除来自具有不同T1的组织的信号。我们提出的方程和样本计算反演时间，并证明了阻力受试者的运动（呼吸，呼吸，说话）从两个反演。静态组织信号的充分抑制允许人们免除标记和减影，将获取图像所需的最小时间减半。中国科学技术出版社. Inc.
Spin label angiography compares two images by subtraction. The first is obtained after blood in one region is labeled by inversion and flows into a region of interest. Labeling is not used for the second image, so only labeled blood remains in the final angiogram after subtraction. This subtraction is never perfect, but with starting images containing less static tissue signal, the remaining background can be reduced. This can be achieved by observing at the zero crossing following an inversion. Multiple inversions allow one to null the signal from tissues with differing T1 simultaneously. We present equations and sample calculations for inversion times and demonstrate the resistance to subject motions (peristalsis, breathing, speaking) resulting from two inversions. Adequate suppression of static tissue signal allows one to dispense with labeling and subtraction, halving the minimum time needed to acquire an image. © 1991 Academic Press. Inc.