Assessement of CBF using Arterial Spin Labeling (ASL) can yield valuable functional information regarding different neuropathological diseases like tumors and stroke without exogenous contrast agents. However, being a subtractive technique, ASL shows high sensitivity to motion artifacts. ASL in combination with a 3D GRASE PROPELLER (3DGP) readout allows self-navigated retrospective motion correction but motion estimates using the standard reconstruction are inaccurate due to geometric distortion. In this work, a novel 3DGP reconstruction algorithm is therefore demonstrated which jointly estimates the distortion field as well as motion parameters without the need for additional reference scans.
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