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Cholecystokinin Cholescintigraphy: Methodology and Normal Values Using a Lactose-Free Fatty-Meal Food Supplement

Department of Radiology, Georgetown University Hospital, Washington, DC

View larger version (40K): [in a new window]   FIGURE 1. Supplement-stimulated gallbladder time–activity curves are shown for subjects 5, 7, 6, 4, 13, and 12 (from left to right and top to bottom). Curves for gallbladder emptying varied considerably, both in delay before emptying began and, most markedly, in pattern of emptying (linear, exponential, or biexponential).

View larger version (22K): [in a new window]   FIGURE 2. Cumulative distribution of GBEF observations for study subjects. Normal model is systematically biased, predicting GBEFs too large below median and too small above median. Nearly perfect fit is obtained with cubic polynomial.