ACCURATE T(1) DETERMINATION FROM INVERSION-RECOVERY IMAGES - APPLICATION TO HUMAN BRAIN AT 4-TESLA

被引:58
作者
KIM, SG
HU, XP
UGURBIL, K
机构
[1] Department of Radiology, Center for Magnetic Resonance Research, University of Minnesota Medical School, Minneapolis, Minnesota
关键词
SPIN-LATTICE RELAXATION (T(1)); INVERSION RECOVERY; MAGNETIC RESONANCE IMAGING (MRI);
D O I
10.1002/mrm.1910310414
中图分类号
R8 [特种医学]; R445 [影像诊断学];
学科分类号
1002 ; 100207 ; 1009 ;
摘要
It is well known that the signal polarity in inversion-recovery (IR) images changes with inversion time, complicating the determination of T1. To avoid this problem, a simple subtraction method is implemented. In this method, k-space data of the longest inversion time are subtracted from the corresponding data of each inversion time. This subtraction yields IR images of same polarity, making it straightforward to derive T1 using a standard fitting routine. Phantom T1 studies with IR Turbo-FLASH images demonstrate that this technique is robust and accurate. Four Tesla T1 values of the human brain were also determined by this method to demonstrate its in vivo utility.
引用
收藏
页码:445 / 449
页数:5
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