Abstract #0172

Detailing Local Multi-Channel RF Surface Coil versus Body RF Coil Transmission for Cardiac MRI at 3 Tesla: Which Configuration is Winning the Game?

Oliver Weinberger^1,2, Lukas Winter¹, Matthias A Dieringer¹, Antje Els¹, Celal Oezerdem¹, Antonino Cassara³, Harald Pfeiffer³, and Thoralf Niendorf^1,2

¹Berlin Ultrahigh Field Facility (BUFF), Max Delbrueck Center for Molecular Medicine (MDC), Berlin, Germany, ²Experimental and Clinical Research Center (ECRC), Charité Medical Faculty, Berlin, Germany, ³Physikalisch Technische Bundesanstalt (PTB), Berlin, Germany

In this work a local four-channel transmit/receive RF coil dedicated for cardiac MR at 3T is compared to a conventional built-in body RF coil in conjunction with a four-channel receive-only RF coil. SAR and B₁⁺ simulations of both configurations are shown. The invivo efficiency performance of both coils in respect to B₁⁺/sqrt(SAR) is demonstrated in 12 healthy subjects. The efficiency surplus of the local RF coil was used to increase the applicable flip angle FA_SSFP of a standard high resolution 2D SSFP protocol or to shorten the used repetition time TR_SSFP by 54%.

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