Perfusion-based event-related functional MRI

被引：0

作者：

Liu, HL ^{[1
]}

Gao, JH ^{[1
]}

机构：

[1] Univ Texas, Hlth Sci Ctr, Imaging Res Ctr, San Antonio, TX 78284 USA

来源：

MAGNETIC RESONANCE IN MEDICINE | 1999年 / 42卷 / 06期

关键词：

perfusion; event-related; single trial; fMRI;

D O I：

10.1002/(SICI)1522-2594(199912)42:6<1011::AID-MRM3>3.3.CO;2-I

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：

Perfusion-based event-related functional MRI was performed by measuring flow-sensitive alternating inversion recovery (FAIR) signal changes during repeated single-trial, short visual stimulation (250 msec), In the Visual cortex activation area, the blood flow increases immediately after the stimulus, reaches the maximum a sec later with a perfusion-sensitized signal change of 16.1 +/- 2.6 %, and then decreases to baseline approximately 11 sec after the stimuli. As it is a more direct reflection of the hemodynamic response, perfusion-based event-related functional MRI techniques may be more useful for human cognitive function studies, compared with blood oxygenation level-dependent (BOLD)-based event-related functional MRI techniques. (C) 1999 Wiley-Liss, Inc.

引用

页码：1011 / 1013

页数：3

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