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Titolo:
An efficient chemical shift imaging scheme for magnetic resonance-guided neurosurgery
Autore:
Liu, HY; Hall, WA; Martin, AJ; Truwit, CL;
Indirizzi:
Univ Minnesota, Dept Radiol, Ctr MR Guided Therapy, Sch Med, Minneapolis, MN 55455 USA Univ Minnesota Minneapolis MN USA 55455 ch Med, Minneapolis, MN 55455 USA
Titolo Testata:
JOURNAL OF MAGNETIC RESONANCE IMAGING
fascicolo: 1, volume: 14, anno: 2001,
pagine: 1 - 7
SICI:
1053-1807(200107)14:1<1:AECSIS>2.0.ZU;2-6
Fonte:
ISI
Lingua:
ENG
Soggetto:
NMR-SPECTROSCOPY; BRAIN; INVIVO; METABOLITES; SENSITIVITY;
Keywords:
CSI; MR spectroscopy; neurosurgery; surgical guidance; interventional MRI;
Tipo documento:
Article
Natura:
Periodico
Settore Disciplinare:
Clinical Medicine
Citazioni:
22
Recensione:
Indirizzi per estratti:
Indirizzo: Liu, HY Univ Minnesota, Dept Radiol, Ctr MR Guided Therapy, Sch Med, Box 292,420 Delaware St SE,Mayo Bldg, Minneapolis, MN 55455 USA Univ Minnesota Box 292,420 Delaware St SE,Mayo Bldg Minneapolis MN USA 55455
Citazione:
H.Y. Liu et al., "An efficient chemical shift imaging scheme for magnetic resonance-guided neurosurgery", J MAGN R I, 14(1), 2001, pp. 1-7

Abstract

An efficient magnetic resonance spectroscopic imaging (MRSI) or chemical shift Imaging (CSI) technique based on multiple spin echoes (MSE) has been implemented, validated, and used In both phantom and In vivo AIR-guided neurosurgical applications. The key concept of the method is to employ MSE to significantly speed up the data collection rate for mapping hydrogen-containing metabolites. Using an echo train length (ETL) of three per excitation to simultaneously fill three consecutive k-space areas, the total scan time for a spectroscopic image matrix size of 32 X 32 has been shortened to approximately I I minutes. An interecho spacing time of 273 msec was used to null the phase anomalies of lactate double peaks due to the J-coupling. This allowed a sufficient long data sampling time to achieve 4 Hz spectral resolution. Performing CSI intraopertively during an MR-guided neurosurgical procedure was shown to be feasible at 1.5 T. More Importantly, it was shown that more relevant Information can be obtained regarding neurochemistry abouta targeted lesion, in addition to conventional MR morphological imaging noninvasively. In 25 MR-guided neurosurgical cases, the alleviated choline signal has been found to be consistent with the existence of rapid tumor cellproliferation in the corresponding area. The actual neurobiopsy guided by the spectroscopic imaging method demonstrate that it could provide valuableinformation in specifying the optimal site in a biopsy procedure, especially in the case Involving a nonenhancing tumor. The multiecho scheme has made the CSI technique efficient enough to be routinely used In MR-guided surgical procedures at 1.5 T and also allows the possibility of taking full advantage of MRI capability. (C) 2001 Wiley-Liss, Inc.

ASDD Area Sistemi Dipartimentali e Documentali, Università di Bologna, Catalogo delle riviste ed altri periodici
Documento generato il 06/04/20 alle ore 08:39:31