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Abstract #3622

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

Redi Poni1,2, Berk Silemek2, Umut Gündoğdu2, Taner Demir2, Niyazi Koray Ertan1,2, and Ergin Atalar1,2

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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