Keywords: MR Fingerprinting, Radiotherapy
Motivation: While motion compensation has been employed in four-dimensional magnetic resonance fingerprinting (4DMRF) reconstruction, suboptimal registration accuracy currently degrades the image quality of motion-resolved tissue maps, precluding its clinical application.
Goal(s): Our goal was to develop a high-quality 4DMRF (HQ-4DMRF) reconstruction method.
Approach: We proposed a temporal low-rank-constrained groupwise 4D registration algorithm (TLc -G4DReg) to achieve robust and precise inter-phase registration for HQ-4DMRF reconstruction.
Results: Results demonstrated that TLc -G4DReg achieved the best performance in comparison with other registration methods used for 4DMRF reconstruction in previous studies.
Impact: This study offers a new registration approach that leverages the temporal low-rank property of respiratory motion as prior knowledge. This method has the potential to register extremely under-sampled images groupwisely, enhancing motion-resolved reconstruction, including but not limited to 4DMRF reconstruction.
How to access this content:
For one year after publication, abstracts and videos are only open to registrants of this annual meeting. Registrants should use their existing login information. Non-registrant access can be purchased via the ISMRM E-Library.
After one year, current ISMRM & ISMRT members get free access to both the abstracts and videos. Non-members and non-registrants must purchase access via the ISMRM E-Library.
After two years, the meeting proceedings (abstracts) are opened to the public and require no login information. Videos remain behind password for access by members, registrants and E-Library customers.
Keywords