FUNCTIONAL MAPPING OF THE HUMAN VISUAL-CORTEX AT 4 AND 1.5 TESLA USING DEOXYGENATION CONTRAST EPI

被引：370

作者：

TURNER, R

JEZZARD, P

WEN, H

KWONG, KK

LEBIHAN, D

ZEFFIRO, T

BALABAN, RS

机构：

[1] MASSACHUSETTS GEN HOSP,CTR NMR,BOSTON,MA 02114

[2] NIH,DEPT DIAGNOST RADIOL,CTR CLIN,BETHESDA,MD 20892

[3] NINCDS,MED NEUROL BRANCH,BETHESDA,MD 20892

来源：

MAGNETIC RESONANCE IN MEDICINE | 1993年 / 29卷 / 02期

关键词：

D O I：

10.1002/mrm.1910290221

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：

The effects of photic stimulation on the visual cortex of human brain were studied by means of gradient-echo echo-planar imaging (EPI). Whole-body 4 and 1.5 T MRI systems, equipped with a small z axis head gradient coil, were used. Variations of image intensity of up to 28% at 4 T, and up to 7% at 1.5 T, were observed in primary visual cortex, corresponding to an increase of blood oxygenation in regions of increased neural activity. The larger effects at 4 T are due to the increased importance of the susceptibility difference between deoxygenated and oxygenated blood at high fields,

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页码：277 / 279

页数：3

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