Abstract #2183

RF field penetrability study of an electrically floating PET insert for simultaneous PET/MRI

Brian J Lee^1,2, Ronald D Watkins¹, Chen-Ming Chang^1,3, and Craig S Levin^1,4,5,6

¹Radiology, Stanford University, Stanford, CA, United States, ²Mechanical Engineering, Stanford University, Stanford, CA, United States, ³Applied Physics, Stanford University, Stanford, CA, United States, ⁴Physics, Stanford University, Stanford, CA, United States, ⁵Electrical Engineering, Stanford University, Stanford, CA, United States, ⁶Bioengineering, Stanford University, Stanford, CA, United States

We have developed a RF-penetrable PET insert for simultaneous PET/MRI and investigated the RF-penetrability with MR experiments and electromagnetic simulations. We have shown that the RF field from the MR body coil penetrates through the inter-module gaps and the ends of the PET insert. We found that ~60% of the RF field transmitted through the ends contributes to the B1 magnitude while the RF field entering through the gaps improves the uniformity provided the ends are also opened. The simulations also show that either shortening the length/height of the modules, or widening the gaps enhances the RF-penetrability by ~16%.

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