1H Magnetic Resonance Spectroscopic Imaging (MRSI) suffers from low signal-to-noise ratio (SNR) and long acquisition times. Time-varying gradient trajectories reduce acquisition time by more efficiently sampling the k-space data. Meanwhile, a subspace approach to high-resolution MRSI (SPICE) elegantly enables high resolution MRSI despite low SNR. To accelerate 3D MRSI, we propose a randomly undersampled, time-varying, 3D-trajectory that synergizes with the SPICE-subspace framework by inducing incoherent aliasing across all four imaging dimensions. This enables ~3x acceleration in analytic experiments and ~2x acceleration in retrospectively undersampled phantom experiments with minimal degradation in image quality in comparison to fully sampled 3D-spiral MRSI.
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