Correction of Bulk Motion and Assessment of Non-Rigid Deformations in Follow-Up Examinations of the Pelvis

Julien Senegas¹, Christian Buerger¹, Torbjoern Vik¹, Peter Mazurkewitz¹, Peter Koken¹

The focus of this work is on the pelvis area, as MRI is being more and more established as imaging modality to assess and monitor prostate cancer and is expected to play an increasing role in the adaptive planning of radiation therapy. We investigated in volunteers a method to correct for bulk motion between consecutive examinations and analyzed the amplitude of local, non-rigid deformations as the consequence of bladder and rectum filling, with particular focus on the prostate.