Cris Lovell-Smith1,
Julian R. Maclaren2, Michael Herbst1, Ilja Kadashevich3,
K.A. Danishad3, Oliver Speck3, Maxim Zaitsev1
1Department
of Radiology, University Medical Center Freiburg, Freiburg, Germany; 2Department
of Radiology, Stanford University, Stanford, CA, United States; 3Faculty
of Natural Sciences, Institute of Experimental Physics (IEP), Magdeburg,
Germany
Motion-induced artefacts in MR images degrade quality. The use of an optical tracking system to prospectively compensate for head movement during brain imaging has been shown to reduce these artefacts. To successfully apply motion correction, the cross-calibration matrix defining the transform between tracking system coordinates and scanner coordinates must be accurately known. We previously reported a method to determine this transform, however it required two experienced MR technicians upward of 20 minutes to perform. We present two newly developed methods that accurately calculate the cross-calibration within two minutes with one operator, thereby reducing the system setup time considerably. This is a major step in bringing prospective motion correction to clinical routine.
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