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Purpose:To assess how accurately ex vivo high‐resolution magic angle spinning (HRMAS) proton magnetic resonance spectroscopy (1H MRS) from small biopsy tissues relate to in vivo 1H MRS (from larger tumor volumes) in human astrocytomas.
Materials and Methods:In vivo (PRESS, TE = 30 msec) and ex vivo (presaturation) 1H spectra of 17 human astrocytomas (4 grade II, 1 grade III and 12 glioblastomas)...
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