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Abstract #4444

RF-sensing for Trigger-based Synchronization of Auxiliary Devices, and Pulse-sequence Debugging

Frank Preiswerk1, Jiarui Cai2, Cheng-Chieh Cheng1, W. Scott Hoge1, Pei-Hsin Wu1, Lawrence P. Panych1, and Bruno Madore1

1Department of Radiology, Brigham and Women's Hospital, Harvard Medical School, Boston, MA, United States, 2Beijing University of Posts and Telecommunications, Beijing, People's Republic of China

Voltage or laser-light triggers are often used to synchronize auxiliary devices to the MR acquisition process. A very simple RF antenna and associated circuit is proposed here instead. The device is used here to trigger ultrasound probe firings, as part of a hybrid ultrasound-MRI system, but could be used for other purposes as well. Compared to scanner-generated triggers, advantages include: 1) vendor- and software release-independent, 2) available in the scan room, 3) no change to product sequences needed, and 4) the little device proved handy for pulse sequence debugging as well.

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