Single shot 3D acquisitions are ideal for ASL because they provide insensitivity to motion and allow for effective background suppression. Current state of the art implementations use stack-of-spiral FSE based imaging for time efficiency and insensitivity to resonance offsets. We introduce here a further improvement in time efficiency by using spirals that are designed to approximate a spherically symmetrical variable density function. Spirals are constrained to elliptical shells, and are numerically optimized for time efficiency. An example trajectory is twice as fast as a cylindrical stack-of-spirals with similar density parameters (excluding refocusing time), and results in high quality ASL 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