Abstract #3622

Modified Class E Amplifiers Used For Two Channel Digital RF Transmit Array System With Integrated Coil

Redi Poni^1,2, Berk Silemek², Umut Gündoğdu², Taner Demir², Niyazi Koray Ertan^1,2, and Ergin Atalar^1,2

¹Electrical and Electronics Engineering, Bilkent University, Ankara, Turkey, ²National Magnetic Resoncance Reasearch Center UMRAM, Bilkent University, Ankara, Turkey

In this work we show a two-channel digitally controlled on coil high efficiency modified Class E amplifier for RF excitation easily tunable for 1.5 and 3 T. The amplifiers coupling in dual channel outside the scanner was investigated to show how the operation integrity of nearby amplifiers is affected. MR experiment in a 3 T scanner was conducted in order to test the two-channel system and showed the feasibility of the system for larger number of channels.

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