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

Stanislas Rapacchi (1) , Thomas Troalen (1, 2) , Maxime Guye (1, 3) , Monique Bernard (1) , Alexis Jacquier (1, 4) , F. Kober (1)

1 CRMBM - Centre de résonance magnétique biologique et médicale
2 Siemens Healthcare [France]
3 CEMEREM - Centre d'Exploration Métabolique par Résonance Magnétique [Hôpital de la Timone - APHM]
4 Département de Radiologie [Hôpital de la Timone - APHM]

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.

Domaines: Imagerie

Stanislas Rapacchi, Thomas Troalen, Maxime Guye, Monique Bernard, Alexis Jacquier, et al.. Simultaneous Multi-Slice (SMS) Cardiac CINE using embedded Hadamard-encoded reference data at 7 Tesla. Proc. Intl. Soc. Mag. Reson. Med. 26, Apr 2018, Paris, France. pp.1056. ⟨hal-02344542⟩