Real Time Prospective Voxel Position Correction with Interleaved Reference Scan Using an Optical Motion Tracking System
Hennig J, Zaitsev M, Speck O, Bchert M
University Hospital Freiburg
Subject motion during MRS investigations is a factor limiting the quality and the diagnostic value of the results. In this abstract a possibility of interfacing the MR scanner with an external optical motion tracking system, capable of determining objects position with sub-millimetre accuracy at a high update rate is demonstrated. Thereafter the information on the object motion is used in real time to update the position of the voxel during the acquisition on every sequence repetition. The degenerative effects of the frequency shifts, induced by the sample motion are effectively suppressed by the interleaved reference scan method.