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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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