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Titolo:
Two-step navigatorless correction algorithm for radial k-space MRI acquisitions
Autore:
Shankaranarayanan, A; Wendt, M; Lewin, JS; Duerk, JL;
Indirizzi:
Univ Hosp Cleveland, Dept Radiol MRI, Cleveland, OH 44106 USA Univ Hosp Cleveland Cleveland OH USA 44106 l MRI, Cleveland, OH 44106 USA Case Western Reserve Univ, Dept Radiol, Cleveland, OH 44106 USA Case Western Reserve Univ Cleveland OH USA 44106 Cleveland, OH 44106 USA Case Western Reserve Univ, Dept Biomed Engn, Cleveland, OH 44106 USA Case Western Reserve Univ Cleveland OH USA 44106 Cleveland, OH 44106 USA Case Western Reserve Univ, Dept Oncol, Cleveland, OH 44106 USA Case Western Reserve Univ Cleveland OH USA 44106 Cleveland, OH 44106 USA
Titolo Testata:
MAGNETIC RESONANCE IN MEDICINE
fascicolo: 2, volume: 45, anno: 2001,
pagine: 277 - 288
SICI:
0740-3194(200102)45:2<277:TNCAFR>2.0.ZU;2-#
Fonte:
ISI
Lingua:
ENG
Soggetto:
MOTION ARTIFACTS; LUNG PARENCHYMA; RECONSTRUCTION; COMPENSATION; ECHOES; FMRI;
Keywords:
rigid body; motion correction; navigator echo; phase variations; k-space; radial acquisition;
Tipo documento:
Article
Natura:
Periodico
Settore Disciplinare:
Clinical Medicine
Life Sciences
Citazioni:
35
Recensione:
Indirizzi per estratti:
Indirizzo: Duerk, JL Univ Hosp Cleveland, Dept Radiol MRI, 11100 Euclid Ave, Cleveland, OH 44106 USA Univ Hosp Cleveland 11100 Euclid Ave Cleveland OH USA 44106 USA
Citazione:
A. Shankaranarayanan et al., "Two-step navigatorless correction algorithm for radial k-space MRI acquisitions", MAGN RES M, 45(2), 2001, pp. 277-288

Abstract

A new way to correct magnetic resonance image artifacts resulting from view-dependent phase variations and view-dependent Variations in rigid body object translation is presented by exploiting basic properties of the trajectory of radial k-space acquisitions. Simulations, phantom studies, and in vivo experiments are used to demonstrate the feasibility and the utility of this method. While somewhat analogous to navigator echo correction, in whichspecial gradients are interleaved into the imaging sequence so echoes at the center of k-space can be acquired prior to or after collection of the image data, the current method does not require additional new gradient structures within the pulse sequence or increases in scan time, The new method uses the phase information from all collected radial k-space data points rather than only the navigator echo, which permits correction of multiple sources of view-dependent phase variation in the image data. The resultant effect is improved image quality in radial MRI acquisitions. Magn Reson Med 45:277-288, 2001, (C) 2001 Wiley-Liss, Inc.

ASDD Area Sistemi Dipartimentali e Documentali, Università di Bologna, Catalogo delle riviste ed altri periodici
Documento generato il 26/01/20 alle ore 09:55:52