Spin-echo versus gradient-echo fMRI with short echo times

被引：47

作者：

Stroman, PW

Krause, V

Frankenstein, UN

Malisza, KL

Tomanek, B

机构：

[1] Natl Res Council Canada, Inst Biodiagnost, MR Technol Grp, Winnipeg, MB R3B 1Y6, Canada

[2] Univ Calgary, Dept Neurosci, Calgary, AB, Canada

来源：

MAGNETIC RESONANCE IMAGING | 2001年 / 19卷 / 06期

关键词：

D O I：

10.1016/S0730-725X(01)00392-7

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：

Blood-oxygen level dependent signal changes in the visual cortex were investigated as a function of echo time with spin-echo and gradient-echo EPI at 1.5 T and 3 T. The linear relationship between the fractional signal change and the echo time was apparent in all cases. Relaxation rate changes determined from the slope of this linear relation agree with published values, intercept values extrapolated to an echo time of zero, however, were 0.66% to 1.0% with spin-echo EPI, and 0.11% to 0.35% with gradient-echo EPI. Spin-echo and gradient-echo EPI can therefore yield similar signal changes at sufficiently short echo times. (C) 2001 Elsevier Science Inc. All rights reserved.

引用

页码：827 / 831

页数：5

共 14 条

[1] SPIN-ECHO AND GRADIENT-ECHO EPI OF HUMAN BRAIN ACTIVATION USING BOLD CONTRAST - A COMPARATIVE-STUDY AT 1.5 T [J].