Simultaneous multivolume spectroscopy (simuvosp) using local techniques
作者:
S. Müller,
H.‐P. Hafner,
N. Beckmann,
期刊:
NMR in Biomedicine
(WILEY Available online 1989)
卷期:
Volume 2,
issue 5‐6
页码: 209-215
ISSN:0952-3480
年代: 1989
DOI:10.1002/nbm.1940020507
出版商: John Wiley&Sons, Ltd.
数据来源: WILEY
摘要:
AbstractMR spectra simultaneously acquired from different locations in the human body may be obtained with the SIMUVOSP technique (Simultaneous Multivolume Spectroscopy). SIMUVOSP is based on multifrequency selective RF pulses which encode positional information of the spins into the phase of the MR signal. This paper describes SIMUVOSP strategies for1H,31P and13C spectroscopy.For1H SIMUVOSP the STEAM experiment may be modified by replacing the selective RF pulses with SIMUFREX pulses (Simultaneous Multifrequency Excitation pulses). This modification allows the simultaneous spectroscopic examination of different regions in the human brain. For31P SIMUVOSP the ISIS method is combined with SIMUFRIN (Simultaneous Multifrequency Inversion) pulses, which generate the inversion of multiple regions during the RF pulse. An application of31P SIMUVOSP is the study of the metabolic heterogeneity of the high energy phosphates within the human body. For13C spectroscopy a localized polarization transfer experiment is combined with multivolume excitation. In this way SIMUVOSP on protons is extended to13C multivolume spectroscopy.
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