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MR-MOTUS: model-based non-rigid motion estimation for MR-guided radiotherapy using a reference image and minimal <i>k</i>-space data
Estimation of internal body motion with high spatio-temporal resolution can greatly benefit MR-guided radiotherapy/interventions and cardiac imaging, but remains a challenge to date. In image-based methods, where motion is indirectly estimated by reconstructing and co-registering images, a trade off between spatial and temporal resolution of the motion-fields has to be …