In this study, we proposed a conceptual MRgRT gating strategy using the organ’s motion positional probability volume (PPV) derived from the time-resolved volumetric MRI, aiming to improve treatment accuracy and efficiency. We demonstrated it for the scenario of kidney MRgRT using prospectively acquired CAIPIRINHA-accelerated VIBE MRI data at 1.5T from 7 healthy volunteers. Gating efficiencies of the proposed method were compared to those using the conventional 40%-60% respiratory phase gating. The results showed that the proposed method achieved significantly higher gating efficiency with similar target positional accuracy, indicating its potential value in the future individualized adaptive MRgRT.
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