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Titolo:
Image-based ghost correction for interleaved EPI
Autore:
Buonocore, MH; Zhu, DC;
Indirizzi:
Univ Calif Davis, Med Ctr, Imaging Ctr, Dept Radiol, Sacramento, CA 95817 USA Univ Calif Davis Sacramento CA USA 95817 Radiol, Sacramento, CA 95817 USA
Titolo Testata:
MAGNETIC RESONANCE IN MEDICINE
fascicolo: 1, volume: 45, anno: 2001,
pagine: 96 - 108
SICI:
0740-3194(200101)45:1<96:IGCFIE>2.0.ZU;2-U
Fonte:
ISI
Lingua:
ENG
Soggetto:
ARTIFACT REDUCTION; PLANAR; RECONSTRUCTION;
Keywords:
magnetic resonance imaging; interleaved echo planar imaging; image artifacts; image-based ghost correction;
Tipo documento:
Article
Natura:
Periodico
Settore Disciplinare:
Clinical Medicine
Life Sciences
Citazioni:
20
Recensione:
Indirizzi per estratti:
Indirizzo: Buonocore, MH Univ Calif Davis, Med Ctr, Imaging Ctr, Dept Radiol, Rm 1215,4701 X St, Sacramento, CA 95817 USA Univ Calif Davis Rm 1215,4701 X St Sacramento CA USA 95817 A
Citazione:
M.H. Buonocore e D.C. Zhu, "Image-based ghost correction for interleaved EPI", MAGN RES M, 45(1), 2001, pp. 96-108

Abstract

A new image-based ghost correction technique is described for general interleaved EPI. This technique works reliably with both even- and odd-number interleaved EPI sequences. It estimates the phase distortions causing the ghosts as a general function of tx,YI even in the presence of a significant overlap of parent image and ghosts. If the phase distortion is assumed to bea function of x (frequency-encode direction) only, the new technique is similar to a recently published correction method for general interleaved EPI(Hennel, J Magn Reson 1998;134:206-213), However, that study concluded that the method for general interleaved EPI did not work. If showed that the SNRs of the edge pixels were too low to accurately estimate the phase distortion. The new technique utilizes not one, but many pixels in the image for estimating the phase distortion. The technique requires a user-defined ROI to outline the parent image and identify so-called eligible pixels for estimating the phase distortion, When all eligible pixels are used, the SNR of the phase distortion estimate is comparable to that obtained in single-shotEPI. This study provides the first examples of high-quality, image-based correction of multiple ghosts in general interleaved EPI, Magn Reson Med 45:96-108, 2001. (C) 2001 Wiley-Liss, Inc.

ASDD Area Sistemi Dipartimentali e Documentali, Università di Bologna, Catalogo delle riviste ed altri periodici
Documento generato il 22/01/20 alle ore 09:18:46