Energy imparted and effective doses in computed tomography

摘要: The radiation risk to patients undergoing computed tomography (CT) examinations may be characterized by using the dose descriptors of effective equivalent (HE) and (E). Values HE E, however, are much more difficult obtain than total energy imparted (epsilon) patient. In this study, representative values ratios HE/epsilon E/epsilon were obtained published Monte Carlo organ computations for typical CT x-ray spectra. patient per unit can combined with independent estimates quantify a any type examination.