Abstract #1914

Comparison of Image Reconstruction Algorithms of “Flexible PET/MRI” with and without Non-Local Mean Regularization.

Yasutaka Fushimi¹, Tomohisa Okada², Mizue Suzuki¹, 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

Flexible PET (fxPET) is a prototype of MR-compatible mobile PET system. We have compared two different image reconstruction algorithms called as dynamic row-action maximum-likelihood algorithm (DRAMA) and DRAMA with non-local mean (DRAMA-NLM) by evaluating image quality and SUV. NLM filter can reduce artifacts and noise with keeping contrast. The image quality was almost similar between two algorithms and DRAMA-NLM shows significantly higher SUV than DRAMA.

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