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Fig. 3 —Graph shows results from 2D evaluation of simulated testing, for which six of 12 wine bottles in cardboard box were spiked with cocaine in different concentrations (10, 30, 50, 70, 90, and 120 g). In this chart, concentration of cocaine in milligrams is marked by circles. Resealed bottles, which were replaced in cardboard box, were scanned with MDCT, and peak of mean attenuation from each bottle was measured. Rounded peak of mean attenuation from each bottle is given as a bar (with numeral at top indicating attenuation). Six bars are in negative area or next to 0 line and six bars are on positive side. Bottles represented by these positive bars were assumed to contain cocaine. Amount of cocaine was estimated to correspond with height of mean attenuation peak. Therefore, bottle 11 was suspected of containing largest amount of cocaine, and bottle 4 was thought to contain small amount of cocaine.