Journal
NUCLEAR INSTRUMENTS & METHODS IN PHYSICS RESEARCH SECTION A-ACCELERATORS SPECTROMETERS DETECTORS AND ASSOCIATED EQUIPMENT
Volume 702, Issue -, Pages 117-120Publisher
ELSEVIER SCIENCE BV
DOI: 10.1016/j.nima.2012.08.071
Keywords
Motion tracking; Structured light; PET/MRI; Markerless; Tracoline
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A markerless motion tracking (MT) system developed for use in PET brain imaging has been tested in the limited field of view (FOV) of the MR head coil from the Siemens Biograph mMR. The system is a 3D surface scanner that uses structured light (SL) to create point cloud reconstructions of the facial surface. The point clouds are continuously realigned to a reference scan to obtain pose estimates. The system has been tested on a mannequin head performing controlled rotational and translational axial movements within the head coil outside the range of the magnetic field. The RMS of the residual error of the rotation was 0.11 degrees and the RMS difference in the translation with the control system was 0.17 mm, within the trackable range of movement. (C) 2012 Elsevier B.V. All rights reserved.
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