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Titolo:
PERFUSION IMAGING USING FOCI RF PULSES
Autore:
YONGBI MN; BRANCH CA; HELPERN JA;
Indirizzi:
NIH,LAB DIAGNOST RADIOL RES,ROOM BIN256,BLDG 10 BETHESDA MD 20892 NATHAN S KLINE INST PSYCHIAT RES,CTR ADV BRAIN IMAGING ORANGEBURG NY 10962 ALBERT EINSTEIN COLL MED,DEPT RADIOL & NEUROSCI NEW YORK NY 00000 NYU,SCH MED,DEPT PSYCHIAT & RADIOL NEW YORK NY 00000
Titolo Testata:
Magnetic resonance in medicine
fascicolo: 6, volume: 40, anno: 1998,
pagine: 938 - 943
SICI:
0740-3194(1998)40:6<938:PIUFRP>2.0.ZU;2-8
Fonte:
ISI
Lingua:
ENG
Soggetto:
RECOVERY FAIR TECHNIQUE; CEREBRAL BLOOD-FLOW; MAGNETIC-RESONANCE; ARTERIAL WATER; NMR-SPECTROSCOPY; BRAIN PERFUSION; SPIN INVERSION; FREQUENCY; SLICE;
Keywords:
FAIR; FOCI; HYPERBOLIC SECANT; PERFUSION; SLICE PROFILE;
Tipo documento:
Article
Natura:
Periodico
Settore Disciplinare:
Science Citation Index Expanded
Citazioni:
18
Recensione:
Indirizzi per estratti:
Citazione:
M.N. Yongbi et al., "PERFUSION IMAGING USING FOCI RF PULSES", Magnetic resonance in medicine, 40(6), 1998, pp. 938-943

Abstract

Pulsed arterial spin-tagging techniques for perfusion measurements (e.g., echo planar MR imaging and signal targeting with alternating radiofrequency (EPISTAR), flow-sensitive alternating inversion recovery (FAIR), quantitative imaging of perfusion using a single subtraction (QUIPPS), uninverted FAIR (UNFAIR)) generally use hyperbolic secant (HS) pulses for spin inversion, The performance of these techniques dependson the inversion efficiency, as well as the sharpness of the slice profiles. Frequency offset corrected inversion (FOCI) pulses, a recentlyproposed HS variant, can provide slice profiles with edges that can be up to 10 times sharper than those obtained with conventional HS pulses, In this communication, the implementation and application of the C-shape FOCI pulse for perfusion imaging in rat brain with the FAIR technique is summarized. Despite providing a more rectangular slice profile than a conventional HS pulse, it is demonstrated both theoreticallyand experimentally that the FAIR perfusion signal is not increased byusing a FOCI tagging pulse, However, the use of a FOCI inversion pulse is shown to significantly minimize static signal subtraction errors that are common with conventional HS pulses. Finally, the suitability of the pulse for perfusion studies is demonstrated, in vivo, on rat brain.

ASDD Area Sistemi Dipartimentali e Documentali, Università di Bologna, Catalogo delle riviste ed altri periodici
Documento generato il 18/09/20 alle ore 17:04:14