High spatiotemporal resolution spin-echo fMRI is challenging as it requires a long echo time to generate BOLD-contrast, resulting in longer repetition times. We propose a new technique, Multisection Excitation by Simultaneous Spin-echo Interleaving (MESSI), which utilizes the dead time in long TE acquisitions to improve the slice-coverage of SE-fMRI. For further accelerations, we combine the MESSI with both ‘complex-basis’ RF-encoded gSlider and conventional-SMS. Compared with standard SE-EPI acquisition with the same TR, the proposed MESSI-gSlider acquisition shows comparable tSNR but with eight-fold increase in slice-coverage. This method should be beneficial for applications requiring high spatiotemporal resolution SE-fMRI with whole-brain coverage.
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