Murat Aksoy1, Melvyn B. Ooi2, Julian R. Maclaren2, Roland Bammer2
1Center for Quantitative Neuroimaging, Department of Radiology, Stanford University, Stanford, CA, United States; 2Center for Quantitative Neuroimaging, Department of Radiology, Stanford University, Stanford, CA, United States
Cross-calibration of the optical tracking system and the scanner is an essential step in prospective motion correction. Errors in cross-calibration cause inaccuracies in motion correction and subsequent motion artifacts in the image. In this study, we assessed the accuracy requirement of cross-calibration for robust motion tracking and correction. Simulations show that for a maximum of 0.5mm pixel position error and in the presence of 10 head rotation, the cross-calibration has to be accurate up to 0.3 and 3 mm. The required accuracy of cross-calibration depends on the maximum motion that needs to be corrected and the baseline position of the camera in the scanner.