Optical prospective motion correction using markers attached to the patient’s head has been widely demonstrated to improve image quality in MRI of the brain. To simplify patient workflow, it would be helpful to remove the need for the marker. We have previously demonstrated markerless tracking using a stereo camera system, but this was done outside of the MR environment and used a 6-axis robot to validate tracking. In this work, we demonstrate markerless optical tracking in two volunteers during simultaneous MRI and use the markerless tracking data to retrospectively realign images.
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