Abstract #4286

Feasibility study of unshielded PET detectors with shielded RF coil for PET/MRI insert

Md Shahadat Hossain Akram¹, Takayuki Obata², Fumihiko Nishikido¹, and Taiga Yamaya¹

¹Advance Nuclear Medicine Sciences, National Institute of Radiological Sciences (NIRS-QST), Chiba, Japan, ²Molecular Imaging and Theranostics, National Institute of Radiological Sciences (NIRS-QST), Chiba, Japan

We used shielded RF coil in combination with unshielded PET detector. A microstrip coil and a head-size birdcage coil was used. For microstrip coil, the ground conductor acted as the shield, while for the birdcage coil a cylindrical RF shield was implemented. A PET detector with front-end electronics was implemented 40 mm far from the RF shields. Phantom studies revealed no RF pickup noise in any of these cases. A maximum 16% reduction in SNR was seen for the microstrip coil between PET detector powered OFF and ON conditions. However, the SNR reduction for the birdcage coil was negligible.

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