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Abstract #3021

An Inexpensive, Scalable Vector Modulator and Application to 2D RF Pulses

Ke Feng1, Neal Anthony Hollingsworth1, John Carl Bosshard1, Douglas C. Noll2, Steven M. Wright1

1Electrical and Computer Engineering, Texas A&M University, College Station, TX, USA; 2Biomedical Engineering, University of Michigan, Ann Arbor, MI, USA

Using a vector modulator system constructed for B1 shimming, full capability of high speed modulation for more complex transmit pulses is shown. By exciting the vector modulators with a hard pulse from a host Varian Inova system, and analog modulation control signals from a D/A card, each board is able to create four completely independent RF waveforms. In order to test the system, one channel was used to create a checkerboard pattern, and the results are shown to be comparable to the Varian Inova system.