Vertical off‐centering affects organ dose in chest CT: Evidence from Monte Carlo simulations in anthropomorphic phantoms

Purpose The objective of our study was to assess the effect of patient vertical off‐centering on organ dose in chest CT with tube current modulation. Methods For this purpose, anthropomorphic phantoms representing adult male, female, and overweight male were scanned on 192‐slice CT scanner at 11 different vertical positions (maximal off‐centering ± 5 cm). Monte Carlo simulations were performed for each of the investigated setup, using tube...