Catalogo Articoli (Spogli Riviste)

OPAC HELP

Titolo:
FLAIR imaging using nonselective inversion pulses combined with slice excitation order cycling and k-space reordering to reduce flow artifacts
Autore:
Herlihy, AH; Oatridge, A; Curati, WL; Puri, BK; Bydder, GM; Hajnal, JV;
Indirizzi:
Univ London Imperial Coll Sci Technol & Med, Sch Med, MRC, Ctr Clin Sci,Robert Steiner Magnet Resonance Unit, London, England Univ London Imperial Coll Sci Technol & Med London England don, England
Titolo Testata:
MAGNETIC RESONANCE IN MEDICINE
fascicolo: 2, volume: 46, anno: 2001,
pagine: 354 - 364
SICI:
0740-3194(200108)46:2<354:FIUNIP>2.0.ZU;2-0
Fonte:
ISI
Lingua:
ENG
Soggetto:
SPINAL-CORD; SEQUENCES; BRAIN; MRI;
Keywords:
magnetic resonance imaging; artifacts; FLAIR; brain; spinal cord; cerebrospinal fluid;
Tipo documento:
Article
Natura:
Periodico
Settore Disciplinare:
Clinical Medicine
Life Sciences
Citazioni:
17
Recensione:
Indirizzi per estratti:
Indirizzo: Hajnal, JV Hammersmith Hosp, MRC, Ctr Clin Sci, Robert Steiner Magnet Resonance Unit,Du Cane Rd, London W12 0HS, England Hammersmith Hosp Du Cane Rd London England W12 0HS HS, England
Citazione:
A.H. Herlihy et al., "FLAIR imaging using nonselective inversion pulses combined with slice excitation order cycling and k-space reordering to reduce flow artifacts", MAGN RES M, 46(2), 2001, pp. 354-364

Abstract

High-signal artifacts produced by cerebrospinal fluid (CSF) flow can adversely affect fluid-attenuated inversion recovery (FLAIR) imaging of the brain and spinal cord. This study explores the use of a nonslice-selective inversion pulse to eliminate CSF flow artifacts together with a technique called "K-space Reordered by Inversion-time for each Slice Position" (KRISP) to achieve constant contrast in a multislice acquisition. Theory shows that with this method the CSF point spread function (PSF) has a minimum at the center and attenuated side lobes, providing CSF suppression, but residual edgesignals remain. The PSF for brain is only mildly attenuated and signals for extended regions are not attenuated. KRISP FLAIR sequences were assessed in 15 patients (10 brain and five spinal cord cases). The images showed reduced CSF and blood flow artifacts and higher conspicuity of the cortex, meninges, ventricular system, brainstem, and cerebellum when compared with conventional FLAIR sequences. (C) 2001 Wiley-Liss, Inc.

ASDD Area Sistemi Dipartimentali e Documentali, Università di Bologna, Catalogo delle riviste ed altri periodici
Documento generato il 18/01/20 alle ore 01:53:46