Table 1.

Comparison of simulation accuracy for cadaver head shown in Fig. 3b. ROI standard deviations and relative errors of tissue and air regions are listed. Original measurements are bold.

		50	150	300	500
Tissue	Original or simulated 50 mAs	35.8±4.6	37.1±4.5 (−3.77%)	37.6±4.4 (−5.16%)	37.6±4.0 (−5.03%)
	Original or simulated 150 mAs	NA	21.1±2.7	21.2±2.6 (−0.61%)	21.1±2.7 (−0.36%)
	Original or simulated 300 mAs	NA	NA	15.8±2.1	15.0±1.8 (5.28%)
Air	Original or simulated 50 mAs	19.2±1.9	19.9±2 (−2.48%)	19.5±1.9 (−1.73%)	19.6±2.1 (−3.77%)
	Original or simulated 150 mAs	NA	12.9±1.7	13.0±1.6 (−1.10%)	12.7±1.5 (1.32%)
	Original or simulated 300 mAs	NA	NA	10.5±1.3	10.4±1.2 (0.88%)