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  • The calculation of dose from external photon exposures using reference human phantoms and Monte Carlo methods - Part VI: Organ doses from computed tomographic examinations

Abstract

Computed tomography (CT) is a technique which offers a high diagnostic capability; however, the dose to the patient is high compared to conventional radiography. This report provides a catalogue of organ doses resulting from CT examinations. The organ doses were calculated for the type of CT scanners most commonly used in the FRG and for three different radiation qualities. For the dose calculations, the patients were represented by the adult mathematical phantoms Adam and Eva. The radiation transport in the body was simulated using a Monte Carlo method. The doses were calculated as conversion factors of mean organ doses per air kerma free in air on the axis of rotation. Mean organ dose conversion factors are given per organ and per single CT slice of 1 cm width. The mean dose to an organ resulting from a particular CT examination can be estimated by summing up the contribution to the organ dose from each relevant slice. A table is given which relates the mathematical phantoms' coordinates to certain anatomical landmarks in the human body.

Additional information

Authors: ZANKL M, GSF - Forschungszentrum für Umwelt und Gesundheit, Neuherberg (DE);PANZER W, GSF - Forschungszentrum für Umwelt und Gesundheit, Neuherberg (DE);DREXLER G, GSF - Forschungszentrum für Umwelt und Gesundheit, Neuherberg (DE)
Bibliographic Reference: Report: GSF-Bericht 30/91 EN (1991)
Availability: Available from GSF - Forschungszentrum für Umwelt und Gesundheit, Ingolstädter Landstraße 1, D-8042 Neuherberg (DE)
Record Number: 199310376 / Last updated on: 1994-11-29
Category: PUBLICATION
Original language: en
Available languages: en