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- W2116719754 abstract "Abstract Signals from intermolecular double‐quantum coherences (iDQCs) have been shown to be insensitive to macroscopic field inhomogeneities and thus enable acquisition of high‐ resolution MR spectroscopy in the presence of large inhomogeneous fields. In this paper, localized iDQC 1 H spectroscopy on a whole‐body 3‐T MR scanner is reported. Experiments with a brain metabolite phantom were performed to quantify characteristics of the iDQC signal under different conditions. The feasibility of in vivo iDQC high‐resolution MR spectroscopy in the presence of large intrinsic and external field inhomogeneity (in the order of hundreds of hertz) was demonstrated in the whole cerebellum of normal volunteers in a scan time of about 6.5 min. Major metabolite peaks were well resolved in the reconstructed one‐dimensional spectra projected from two‐dimensional iDQC acquisitions. Investigations on metabolite ratios, signal‐to‐noise ratio, and line width were performed and compared with results obtained with conventional point‐resolved spectroscopy/MR spectroscopy in homogeneous fields. Metabolite ratios from iDQC results showed excellent consistency under different in vitro and in vivo conditions, and they were similar to those from point‐resolved spectroscopy with small voxel sizes in homogeneous fields. MR spectroscopy with iDQCs can be applied potentially for quantification of gross metabolite changes due to diseases in large brain volumes with high field inhomogeneity. Magn Reson Med, 2010. © 2010 Wiley‐Liss, Inc." @default.
- W2116719754 created "2016-06-24" @default.
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- W2116719754 date "2010-01-23" @default.
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- W2116719754 title "High-resolution MRS in the presence of field inhomogeneity via intermolecular double-quantum coherences on a 3-T whole-body scanner" @default.
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- W2116719754 doi "https://doi.org/10.1002/mrm.22224" @default.
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