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Titolo:
REDUCING FLOW ARTIFACTS IN ECHO-PLANAR IMAGING
Autore:
PAT GTL; MEYER CH; PAULY JM; NISHIMURA DG;
Indirizzi:
STANFORD UNIV,DEPT ELECT ENGN,INFORMAT SYST LAB,DURAND 303 STANFORD CA 94305
Titolo Testata:
Magnetic resonance in medicine
fascicolo: 3, volume: 37, anno: 1997,
pagine: 436 - 447
SICI:
0740-3194(1997)37:3<436:RFAIEI>2.0.ZU;2-W
Fonte:
ISI
Lingua:
ENG
Soggetto:
RECONSTRUCTION; LIMITATIONS; RESOLUTION;
Keywords:
MAGNETIC RESONANCE IMAGING; ECHO-PLANAR IMAGING; FLOW ARTIFACTS;
Tipo documento:
Article
Natura:
Periodico
Settore Disciplinare:
Science Citation Index Expanded
Citazioni:
30
Recensione:
Indirizzi per estratti:
Citazione:
G.T.L. Pat et al., "REDUCING FLOW ARTIFACTS IN ECHO-PLANAR IMAGING", Magnetic resonance in medicine, 37(3), 1997, pp. 436-447

Abstract

Echo-planar imaging (EPI) is very susceptible to flow artifacts, Two ways to improve its flow properties are presented. First, ''partial flyback'' is proposed to reduce artifacts arising from flow in the readout direction. Near the center of k-space, only the even echoes of the EPI echo-train are used. Partial flyback is shown to improve the readout-flow properties at the expense of a slight worsening of the phase-encode flow and off-resonance properties. We recommend that the flybackregion acquire 95% of the energy in k-space. Second, ''inside-out'' EPI is used to reduce artifacts arising from flow in the phase-encode direction, Data collection begins at the center of k-space, with separate interleaves to acquire the top and bottom halves of k-space, Partial flyback is combined with partial-Fourier EPI and inside-out EPI. Partial-flyback inside-out EPI has worse off-resonance properties than partial-flyback partial-fourier EPI but demonstrates better flow properties and does not require partial k-space reconstruction.

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Documento generato il 06/04/20 alle ore 01:36:32