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Titolo:
Functional MRI of the human amygdala?
Autore:
Merboldt, KD; Fransson, P; Bruhn, H; Frahm, J;
Indirizzi:
Biomed NMR Forsch GmbH, Max Planck Inst Biophys Chem, D-37070 Gottingen, Germany Biomed NMR Forsch GmbH Gottingen Germany D-37070 7070 Gottingen, Germany Karolinska Inst Hosp, MR Res Ctr, Stockholm, Sweden Karolinska Inst Hosp Stockholm Sweden sp, MR Res Ctr, Stockholm, Sweden
Titolo Testata:
NEUROIMAGE
fascicolo: 2, volume: 14, anno: 2001,
pagine: 253 - 257
SICI:
1053-8119(200108)14:2<253:FMOTHA>2.0.ZU;2-C
Fonte:
ISI
Lingua:
ENG
Soggetto:
FACIAL EXPRESSIONS; ACTIVATION; FMRI; BRAIN; RESPONSES; EXPLICIT; FEAR;
Tipo documento:
Article
Natura:
Periodico
Settore Disciplinare:
Life Sciences
Citazioni:
17
Recensione:
Indirizzi per estratti:
Indirizzo: Frahm, J Biomed NMR Forsch GmbH, Max Planck Inst Biophys Chem, D-37070 Gottingen, Germany Biomed NMR Forsch GmbH Gottingen Germany D-37070 ingen, Germany
Citazione:
K.D. Merboldt et al., "Functional MRI of the human amygdala?", NEUROIMAGE, 14(2), 2001, pp. 253-257

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 mul, the present results suggest that reliable imaging of the amygdala with BOLD sensitivity requires voxel sizes of 4 to 8 mul 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. (C) 2001 Academic Press.

ASDD Area Sistemi Dipartimentali e Documentali, Università di Bologna, Catalogo delle riviste ed altri periodici
Documento generato il 29/03/20 alle ore 12:17:34