pTX Spoke RF Pulses for Cardiac MRI at 7T: a New Design Robust against Respiration Induced Errors, based on a Virtual Simultaneous Exhale-and-Inhale Calilbration Scan

Cardiac MRI at ultra-high fields is challenged by the short RF wavelength that induces flip-angle variations. We have addressed this problem successfully in 7T cardiac CINE imaging using parallel transmission (pTX) with 2-spoke RF pulses. Sometimes, however, we observed deviations from our expectations. We suspected, that the subjects respiratory state during cardiac CINE breath-hold scans is different than during transmit B1 calibration scans (also breath-hold). Here we investigate the impact of breath-hold position on 7T cardiac CINE imaging using 2-spoke pTX pulses and demonstrate a pulse design strategy to increase the robustness of spoke pulses to variations in breath-hold position.

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.

Click here for more information on becoming a member.