Abstract #4557

Quantitative and qualitative evaluation of "Flexible PET/MRI" images in brain

Mizue Suzuki¹, Yasutaka Fushimi¹, Tomohisa Okada², Takuya Hinoda¹, Ryusuke Nakamoto¹, Yuji Nakamoto¹, and Kaori Togashi¹

¹Department of Diagnostic Imaging and Nuclear Medicine, Kyoto University Graduate School of Medicine, Kyoto, Japan, ²Human Brain Research Center, Kyoto University Graduate School of Medicine, Kyoto, Japan

A newly developed " Flexible PET (fxPET)" is a prototype of MR-compatible mobile PET system. We tried to investigate the clinical feasibility of the fxPET with a 1.5T MRI compared with PET/CT for brain imaging. Twenty-one patients ( including 12 patients with known intracranial masses) were enrolled in this study. We compared misregistration between fxPET/MRI and PET/CT, and compared the image quality of fxPET and PET in both qualitative (visual rating) and quantitative (standardized uptake value (SUV)-based analysis ) manner. Consequently, fxPET/MRI showed acceptable misregistration and enough image quality, revealing clinical feasibility comparable to that of PET/CT.

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