Influence of the number of motion states. a) Influence of the number of motion states on the relative difference between calculated and experimental film response distribution. Data are grouped according to the motion amplitude. The dashed lines are added to guide the eye. b) The required number of motion states pr was determined for each measured parameter combination at 8, 15, and 20 mm motion amplitude a. A linear fit based on the mean of each measured motion amplitude yielded p
= 0.58 · a - 0.05.