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Titolo:
An inverse problem approach to the correction of distortion in EPI images
Autore:
Munger, P; Crelier, GR; Peters, TM; Pike, GB;
Indirizzi:
McGill Univ, Montreal Neurol Inst, Montreal, PQ H3A 2B4, Canada McGill Univ Montreal PQ Canada H3A 2B4 Inst, Montreal, PQ H3A 2B4, Canada Univ Western Ontario, John P Robarts Res Inst, London, ON N6A 5C1, Canada Univ Western Ontario London ON Canada N6A 5C1 London, ON N6A 5C1, Canada
Titolo Testata:
IEEE TRANSACTIONS ON MEDICAL IMAGING
fascicolo: 7, volume: 19, anno: 2000,
pagine: 681 - 689
SICI:
0278-0062(200007)19:7<681:AIPATT>2.0.ZU;2-X
Fonte:
ISI
Lingua:
ENG
Soggetto:
MAGNETIC-RESONANCE; PLANAR; RECONSTRUCTION;
Keywords:
conjugate gradient method; distortion; echo-planar imaging (EPI); image processing; magnetic resonance imaging (MRI); reconstruction;
Tipo documento:
Article
Natura:
Periodico
Settore Disciplinare:
Clinical Medicine
Engineering, Computing & Technology
Citazioni:
18
Recensione:
Indirizzi per estratti:
Indirizzo: Pike, GB McGill Univ, Montreal Neurol Inst, 3801 Univ St, Montreal, PQ H3A2B4, Canada McGill Univ 3801 Univ St Montreal PQ Canada H3A 2B4 A 2B4, Canada
Citazione:
P. Munger et al., "An inverse problem approach to the correction of distortion in EPI images", IEEE MED IM, 19(7), 2000, pp. 681-689

Abstract

Magnetic resonance imaging using the echo planar imaging (EPI) technique is particularly sensitive to main (B-o) field inhomogeneities. The primary effect is geometrical distortion in the phase encoding direction. In this paper, we present a method based on the conjugate gradient algorithm to correct for this geometrical distortion, by solving the EPI imaging equation. Two versions are presented: one that attempts to solve the full four-dimensional (4-D) imaging equation, and one that independently solves for each profile along the blip encoding direction. Results are presented for both phantom and in vivo brain EPI images and compared with other proposed correctionmethods.

ASDD Area Sistemi Dipartimentali e Documentali, Università di Bologna, Catalogo delle riviste ed altri periodici
Documento generato il 03/06/20 alle ore 08:42:08