Towards Markerless Optical Tracking for Prospective Motion Correction in Brain Imaging
Julian Maclaren1, Andre Kyme2,3, Murat Aksoy1, and Roland Bammer1
1Department of Radiology, Stanford University, Stanford, CA, United States, 2Department of Biomedical Engineering, University of California Davis, Davis, CA, United States, 3Brain and Mind Centre, University of Sydney, Sydney, Australia
Prospective motion correction
based on optical tracking shows promise for improving image quality in MR brain
imaging. To simplify this technique and expedite clinical deployment, it is
desirable to avoid attaching markers to the patient’s head. Here we demonstrate
proof-of-principle markerless tracking using an MR-compatible stereo camera and
head coil configuration. We tested the method outside the MR environment using
a 6-axis robot, capable of very accurate and repeatable (~20 µm) motion, to
control a head phantom. Close agreement between our pose estimates and the
applied motion suggests that accurate markerless tracking of the head is feasible
in MRI.
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