A number of retrospective Cartesian encoding strategies exist for duel gated cardio-respiratory imaging, including freebreathing cine. If respiration and cardiac motion are known prospectively while scanning, is prospective sampling more efficient? To test this we developed an algorithm to prospectively handle variable acquisition durations for each cardio-respiratory bin while acquiring pre-defined Poisson-Disk variable density sampling masks. We compared this to a retrospective spiral profile Cartesian trajectory and found the prospective method had between 10% and 25% higher efficient for matched scan time and had between 20% and 40% higher peak-to-sidelobe ratio of the point-spread-function, which is beneficial for image 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