Keywords: New Trajectories & Spatial Encoding Methods, Acquisition Methods, Spatiotemporal-encoding, SPEN, quadratic gradients, non-linear gradients
Motivation: SPatiotemporal-ENcoding (SPEN) provides an alternative encoding method in MRI by applying a quadratic phase-profile to counteract distortions due to magnetic field inhomogeneities. However, SAR-constraints arising from the use of chirp-RF pulses hinders clinical application.
Goal(s): Overcoming current SAR-constraints of SPEN by inducing a quadratic phase, using non-linear gradients to demonstrate the feasibility for a clinical application.
Approach: Use of a custom-built matrix gradient coil for generating a quadratic phase-profile instead of SAR-intensive chirp-RF pulses.
Results: SPEN with non-linear gradients is possible and delivers comparable results to the chirp-RF pulse method while overcoming its current limitations, demonstrating the potential for clinical application.
Impact: Non-linear gradient-based spatiotemporal-encoding overcomes SAR-limitations resulting from the use of chirp-RF pulses for quadratic phase profile generation, while providing comparable results, making clinical application feasible.
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