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Comparison of Image-Based Retrospective and Optical Prospective Motion Correction for Diffusion Tensor Imaging

INTRODUCTION Correction of rigid head motion correction is important in diffusion tensor imaging because of the long acquisition times. Rigid head correction can be carried out either retrospectively prospectively. In this study, we compared the effectiveness of these two approaches in correcting motion artifacts in DTI. Retrospective correction was based on MR-based navigator data (1-3), whilst prospective correction used an external tracking system (4,6).