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Abstract #4122

Designing RF Screens for MRI guided Fucused Ultrasound Applications

Rock Hadley1, Henrik Odeen2, Robb Merrill2, Sam Adams2, Viola Rieke2, Allison Payne2, and Dennis Parker2
1Radiology and Imaging Sciences, University of Utah, Salt Lake City, UT, United States, 2University of Utah, Salt Lake City, UT, United States

This work evaluates screens with different hole size in their ability to pass ultrasound and their ability to shield RF in a Transcranial MR guided Focused Ultrasound experiment. Hydrophone and radiation force balance studies were used to measure attenuation and peak pressure when passing ultrasound through the screens compared to water-only measurements. Electromagnetic simulations and MRI experiments were performed to measure RF shielding effectiveness of the screens by comparing their ability to change known artifacts in a transcranial transducer compared to a solid conductor.

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