Motion Detection and Correction Using Non-marker-attached Optical System during MRI Scanning

Motion artifact is a major challenge affecting the image quality of MRI. Navigator based motion correction usually need extra scan time with sequence dependence, while existing optical motion tracking systems need markers for accurate motion measurements. Therefore, we proposed a non-marker-attached optical motion tracking system based on structured light to measure the absolute distance, which has the merits of high accuracy, sequence independence and no patient interaction. This study demonstrated that the motion can be accurately identified with the proposed method and then corrected retrospectively by deleting and resynthesizing the corresponding corrupted k-space lines.

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