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. 2020 Dec 22;29(3):1205–1214. doi: 10.1007/s12350-020-02448-y

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© The Author(s) 2020

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Nitrogen-13 ammonia PET in a patient undergoing adenosine stress PET/MR. A transaxial slice through the spleen is shown. There is lower tracer activity of the spleen (*) during stress (A) as compared to rest (B). Similarly, a quantitative assessment by splenic time activity curves, showing a SAR of 0.29 (positive SAR) (C)