Tomographic Anthropomorphic Models Part Ⅱ:nOrgan Doses from Computed TomographicnExaminations in Paediatric Radiology

摘要

This report provides a catalogue of organ dose conversion factors result¬ing from computed tomographic (CT) examinations of children.nTwo radiation qualities and two exposure geometries were simulated as well as the use of asymmetrical beams. The use of further beam shaping devices was not considered.nThe organ dose conversion factors are applicable to babies at the age of ca. 2 months and to children between 5 and 7 years but can be used for other ages as well with the appropriate adjustments. For the calculations, the patients were represented by the GSF tomographic anthropomorphic models BABY and CHILD. The radiation transport in the body was simulated using a Monte Carlo method. The doses are presented as conversion factors of mean organ doses per air kerma free in air on the axis of rotation.