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Abstract #2784

A Variable Power Combiner for 7 Tesla MRI System with 16-Channel Coil Array

Pedrm Yazdanbakhsh1, Klaus Solbach1, Andreas K. Bitz2, Mark E. Ladd2

1HFT, Duisburg-Essen University, Duisburg, NRW, Germany; 2Erwin L. Hahn Institute for Magnetic Resonance Imaging, Essen, Germany

This abstract presents a variable power combiner which is designed and fabricated for our 7-Tesla Magnetic Resonance Imaging (MRI) system. Using this variable power combiner our 16-channel coil (Antenna) array system, consisting of a 1616 Butler Matrix and 16-channel coil array, can be excited at different power distributions with prescribed both amplitudes and phases. Vector modulator phase and amplitude weights are calculated based on the S-matrix of the combiner network and the prescribed output amplitudes and phases.