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Functional MRI of the human amygdala?

Abstract：

:In view of an increasing number of publications that deal with functional mapping of the human amygdala using blood oxygenation-level-dependent (BOLD) magnetic resonance imaging, we reevaluated the underlying image quality of T2*-weighted echoplanar imaging (EPI) and fast low angle shot (FLASH) sequences at 2.0-T with regard to susceptibility-induced signal losses and geometric distortions. Apart from the timing of the gradient echoes, the degree of susceptibility influences is controlled by the image voxel size. Whereas published amygdala studies report voxel sizes ranging from 22 to 125 microl, the present results suggest that reliable imaging of the amygdala with BOLD sensitivity requires voxel sizes of 4 to 8 microl or less. Preferentially, acquisitions should be performed with a coronal section orientation. Although high-resolution BOLD MRI is at the expense of temporal resolution and volume coverage, it seems to provide the only solution to this physical problem.

journal_name

Neuroimage

journal_title

NeuroImage

authors

Merboldt KD,Fransson P,Bruhn H,Frahm J

doi

10.1006/nimg.2001.0802

keywords:

subject

Has Abstract

pub_date

2001-08-01 00:00:00

pages

253-7

issue

2

eissn

1053-8119

issn

1095-9572

pii

S1053-8119(01)90802-X

journal_volume

14

pub_type

杂志文章

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