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Abstract #1056

Simultaneous Multi-Slice (SMS) Cardiac CINE using embedded Hadamard-encoded reference data at 7 Tesla

stanislas Rapacchi1, Thomas Troalen2, Maxime Guye3, Monique Bernard3, Alexis Jacquier3, and Frank Kober3

1CRMBM, Aix Marseille University CNRS, Marseille, France, 2Siemens Healthineers, Saint Denis, France, 3Aix-Marseille Univ, CNRS, CRMBM, Marseille, France

To perform high-resolution cardiac function MRI, thin-slice Cine MRI at 7T is accelerated using Simultaneous Multi-Slice (SMS) technique. Additionally, Hadamard encoding strategy along the temporal dimension is superimposed on the CAIPIRINHA phase shift. The Hadamard-decoded data serve as embedded reference for SMS image reconstruction. Additional in-plane L1-SPIRiT reconstruction allows for limited noise amplification. Results show excellent slice separation, satisfactory SNR and CNR for assessment of cardiac function. However, SAR restrictions impose a lower flip angle for SMS acquisitions that result in poorer blood-to-myocardium contrast.

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