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Titolo:
SINGLE-SHOT, VARIABLE FLIP-ANGLE SLICE-SELECTIVE EXCITATION WITH 4 GRADIENT-MODULATED ADIABATIC HALF-PASSAGE SEGMENTS
Autore:
HSU EW; REEDER SB; MACFALL JR;
Indirizzi:
DUKE UNIV,MED CTR,CTR INVIVO MICROSCOPY,DUMC 3302 DURHAM NC 27710 JOHNS HOPKINS UNIV,SCH MED,DEPT BIOMED ENGN BALTIMORE MD 21205
Titolo Testata:
Magnetic resonance in medicine
fascicolo: 2, volume: 40, anno: 1998,
pagine: 334 - 340
SICI:
0740-3194(1998)40:2<334:SVFSEW>2.0.ZU;2-M
Fonte:
ISI
Lingua:
ENG
Soggetto:
SURFACE COIL; PULSES;
Keywords:
ADIABATIC PULSES; GRADIENT-MODULATED SELECTIVE EXCITATION; SINGLE SHOT;
Tipo documento:
Article
Natura:
Periodico
Settore Disciplinare:
Science Citation Index Expanded
Citazioni:
13
Recensione:
Indirizzi per estratti:
Citazione:
E.W. Hsu et al., "SINGLE-SHOT, VARIABLE FLIP-ANGLE SLICE-SELECTIVE EXCITATION WITH 4 GRADIENT-MODULATED ADIABATIC HALF-PASSAGE SEGMENTS", Magnetic resonance in medicine, 40(2), 1998, pp. 334-340

Abstract

Adiabatic pulses, although useful in generating uniform spin nutationin the presence of inhomogeneous B-1 fields, are limited for NMR imaging applications due to the lack of slice-selective excitation capability. Selective excitation techniques using gradient modulation have been introduced; however, present methods require either a minimum of two excitations or eight adiabatic segments. Here, a scheme is presentedthat allows single-shot, arbitrary flip-angle, and slice-selective excitation with only four adiabatic half-passage segments. The techniqueis demonstrated via computer simulation and experimental tests on a phantom. Furthermore, issues associated with the implementation of these gradient-modulated adiabatic pulses are discussed.

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Documento generato il 27/11/20 alle ore 13:27:05