Keywords: New Trajectories & Spatial Encoding Methods, Parallel Transmit & Multiband, CAIPIRINHA, SMS
Motivation: For Multiband and 3D EPI (and spirals), k-space sampling patterns used to date, were either optimized heuristically (blipped-CAIPIRINHA) or only available for a discrete subset of imaging parameters (T-Hex).
Goal(s): To find the optimum sampling pattern for arbitrary imaging parameters.
Approach: We propose the packing density of the k-space grid in the phase-encoding plane as a metric to assess the quality of a sampling pattern, since it minimizes the noise amplification for spherical objects. Furthermore, we choose L’s and Δ’s (blipped-CAIPIRINHA nomenclature) as real-valued numbers.
Results: The novel sampling patterns achieve more homogeneous k-space coverage (up to 30% higher packing density) than blipped-CAIPIRINHA.
Impact: The proposed method generates k-space sampling patterns that have potential to maximize the SNR yield per unit time in Multiband and 3D imaging by providing the most homogeneous k-space sampling for an arbitrary given set of imaging parameters.
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