Adaptive motion correction of single-voxel spectroscopy with real-time frequency correction at 3 T and 7 T

The coherent accumulation of PRESS scans suffers from head motion and frequency drift. We present an adaptive approach consisting of fetching the current position of the head before each scan using an embedded set of three cameras placed near the head coil, and determining the frequency from the transverse magnetization of the water protons after the first frequency selective 90 saturation pulse of the WET water suppression scheme.

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