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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