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Radiation Protection Dosimetry Advance Access published online on September 25, 2009
Radiation Protection Dosimetry, doi:10.1093/rpd/ncp171
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© The Author 2009. Published by Oxford University Press. All rights reserved. For Permissions, please email: journals.permissions@oxfordjournals.org

AUTOMATED EFFECTIVE DOSE ESTIMATION IN CT

M. Sánchez García*, M. Pombar Cameán, R. Lobato Busto, V. Luna Vega, J. Mosquera Sueiro, C. Otero Martínez and J. R. Sendón del Río

Servizo de Radiofísica e Protección Radiolóxica, Complexo Hospitalario Universitario de Santiago de Compostela (CHUS), Santiago de Compostela, Spain

* Corresponding author: manusan{at}gmail.com

Received October 15, 2008, amended August 7, 2009, accepted August 24, 2009

European regulations require the dose delivered to patients in CT examinations to be monitored and checked against reference levels. Dose estimation has traditionally been performed manually. This is time consuming and therefore it is typically performed on just a few patients and the results extrapolated to the general case. In this work an automated method to estimate the dose in CT studies is presented. The presented software downloads CT studies from the corporative picture archiving and communication system and uses the information on the DICOM headers to perform the dose calculation. Automation enables dose estimations to be performed on a larger fraction of studies, enabling more significant comparisons with diagnostic reference levels (DRLs). A preliminary analysis involving 5800 studies is presented with details of dose distributions for selected CT protocols in use at a university hospital. Average doses are compared with DRLs. Effective dose estimations are also compared with estimations based on the dose length product.


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