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FIGURE 1. Flow chart of activity quantification method using 3 different image types: anteroposterior WB scans, WB scintillation camera transmission scan, and CT scan. Coordinate system used is shown at bottom. Text in bold denotes images. CA = raw anterior scan; CP = raw posterior scan; PA = primary-count-rate image, anterior; PP = primary-count-rate image, posterior; AMTCT = attenuation map from scintillation camera transmission scan; 
(x,y,z) = mass density distribution; GM = geometric mean image; AMCT = attenuation map from CT scan; µ/ = mass attenuation coefficient; AM = energy-converted WB attenuation map; actVOI = VOI activity.
