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Parameter Specifications Camera type PET or PET/CT Energy peak 511 keV Injection-to-imaging time 3–5 min (4 min optimal) Attenuation correction PET: cesium or germanium source PET/CT: CT acquisition Patient position Supine Arm position Above head Bed positions Adequate to include upper thigh to skull base (ischial tuberosities to vertex) Time per bed position* 5 min for pelvis region (2 bed positions) 3–5 min for remaining bed positions View Mid thigh to skull base ↵* Site- and scanner-dependent.