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Titolo:
On the effects of gating in diffusion imaging of the brain using single shot EPI
Autore:
Skare, S; Andersson, JLR;
Indirizzi:
MR Ctr, Dept Clin Neurosci, SE-17176 Stockholm, Sweden MR Ctr Stockholm Sweden SE-17176 in Neurosci, SE-17176 Stockholm, Sweden
Titolo Testata:
MAGNETIC RESONANCE IMAGING
fascicolo: 8, volume: 19, anno: 2001,
pagine: 1125 - 1128
SICI:
0730-725X(200110)19:8<1125:OTEOGI>2.0.ZU;2-U
Fonte:
ISI
Lingua:
ENG
Soggetto:
MOTION; PERFUSION; INVIVO; MRI;
Keywords:
diffusion tensor imaging; magnetic resonance imaging; cardiac gating; triggering; artifacts;
Tipo documento:
Article
Natura:
Periodico
Settore Disciplinare:
Clinical Medicine
Citazioni:
15
Recensione:
Indirizzi per estratti:
Indirizzo: Skare, S MR Ctr, Dept Clin Neurosci, SE-17176 Stockholm, Sweden MR Ctr Stockholm Sweden SE-17176 ci, SE-17176 Stockholm, Sweden
Citazione:
S. Skare e J.L.R. Andersson, "On the effects of gating in diffusion imaging of the brain using single shot EPI", MAGN RES IM, 19(8), 2001, pp. 1125-1128

Abstract

To reduce image artifacts in diffusion tensor imaging using single shot EPI, cardiac gating may be performed to prevent brain motion induced signal void in the DWI data. In this work the necessity of performing cardiac gating with single shot echo planar imaging has been explored using F statisticsof the variance in DWI data. Peripheral measurement of the cardiac cycle has been employed because of its greater convenience, and hence use, compared to ECG gating. Four volunteers have been studied. Six different trigger delays have been evaluated in the range 18-500 ms relative the peripheral pulse wave. Brain motion was found significant in and inferior to the corpus callosum area. A trigger delay of 500 ms was found to be optimal. However, a long delay allows only for one slice per R-R interval. Therefore, a minimum trigger delay may be the best choice in terms of SNR per unit of experiment time. (C) 2001 Elsevier Science Inc. All rights reserved.

ASDD Area Sistemi Dipartimentali e Documentali, Università di Bologna, Catalogo delle riviste ed altri periodici
Documento generato il 24/01/20 alle ore 12:18:31