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Acquisition and image-processing work flow. (Top) PET/MR and CT acquisitions. (Middle) Derivation of CT-based, MR-based, and transmission-based attenuation maps. (Bottom) Reconstruction of PET images with CT-based, MR-based, and transmission-based attenuation maps for attenuation correction (AC). BX = blank reference scan; EX = emission scan; TEX = simultaneous transmission–emission scan.
