Oliver Weinberger1,2, Lukas Winter1, Matthias A Dieringer1, Antje Els1, Celal Oezerdem1, Antonino Cassara3, Harald Pfeiffer3, and Thoralf Niendorf1,2
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 FASSFP of a standard
high resolution 2D SSFP protocol or to shorten the used repetition time TRSSFP by 54%.
