PET inserts for the existing MRI systems are showing great potential for widespread and affordable low-cost simultaneous PET/MR imaging that would otherwise improve the PET sensitivity due to the proximity of detectors to the imaging region. To avoid electromagnetic interference between PET and MRI components, PET detectors are enclosed in Faraday shield cages. A electrically floating PET insert enables us to use MRI built-in body RF coil instead of using separate custom designed RF coil with the PET insert. This study experimentally evaluates different PET geometries and different design factors for efficient RF penetration through the floating-PET insert.
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