Four-dimensional (4D) image are widely used to capture the respiration-induced motion of the abdominal organs in free-breathing radiotherapy. However, due to the breathing variability, appropriate assignment of images to each phase is critical in revealing the motion of anatomy structures. In this study, we proposed a novel approach to develop high-quality retrospective 4D-MRI. Instead of sorting images only based on their respiratory phases, the proposed strategy sorted the images using both the respiratory phases and the internal surrogate positions. The proposed strategy was tested using in-vivo human abdominal images.
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