Catalogo Articoli (Spogli Riviste)

OPAC HELP

Titolo:
Artifact due to B-o fluctuations in fMRI: Correction using the k-space central line
Autore:
Durand, E; van de Moortele, PF; Pachot-Clouard, M; Le Bihan, D;
Indirizzi:
Unite Rech Resonance Magnet Med, Le Kremlin Bicetre, France Unite Rech Resonance Magnet Med Le Kremlin Bicetre France cetre, France CEA, Serv Hosp Frederic Joliot, Direct Sci Vivant, F-91406 Orsay, France CEA Orsay France F-91406 oliot, Direct Sci Vivant, F-91406 Orsay, France
Titolo Testata:
MAGNETIC RESONANCE IN MEDICINE
fascicolo: 1, volume: 46, anno: 2001,
pagine: 198 - 201
SICI:
0740-3194(200107)46:1<198:ADTBFI>2.0.ZU;2-Y
Fonte:
ISI
Lingua:
ENG
Soggetto:
FIELD;
Keywords:
fMRI; B-o; stability; artifacts; EPI; navigator echo;
Tipo documento:
Article
Natura:
Periodico
Settore Disciplinare:
Clinical Medicine
Life Sciences
Citazioni:
12
Recensione:
Indirizzi per estratti:
Indirizzo: Durand, E CHU Bicetre, Unite Rech Resonance Magnet Med U2R2M, 78 Rue Gen Leclerc, F-94275 Le Kremlin Bicetre, France CHU Bicetre 78 Rue Gen Leclerc Le Kremlin Bicetre France F-94275
Citazione:
E. Durand et al., "Artifact due to B-o fluctuations in fMRI: Correction using the k-space central line", MAGN RES M, 46(1), 2001, pp. 198-201

Abstract

Magnetic resonance experiments require the main magnetic field, B-O, to remain very stable, Several external sources, such as moving ferromagnetic objects and/or changing electromagnetic fields, can significantly change the value of B-O over time, This work describes an apparent displacement along the phase-encoding axis caused by a variation in B-O. This artifact was observed in fMRI images acquired with EPI, The effect was characterized and tested using an immobile phantom, The image displacement motion along the phase-encoding axis closely followed the changes in B-O. The phase of the central line in the Fourier space was successfully used to correct this artifact. Fluctuations in B-O may result in artifacts that mimic subject head motion, and must be appropriately corrected. Magn Reson Med 46:198-201, 2001, (C) 2001 Wiley-Liss, Inc.

ASDD Area Sistemi Dipartimentali e Documentali, Università di Bologna, Catalogo delle riviste ed altri periodici
Documento generato il 25/01/20 alle ore 09:26:58