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Radiation Protection Dosimetry Advance Access originally published online on October 13, 2006
Radiation Protection Dosimetry 2007 123(3):402-408; doi:10.1093/rpd/ncl149
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© The Author 2006. Published by Oxford University Press. All rights reserved. For Permissions, please email: journals.permissions@oxfordjournals.org

TECHNICAL NOTES

Number of X-ray examinations performed on paediatric and geriatric patients compared with adult patients

A. Aroua1,*, F. O. Bochud1, J.-F. Valley1, J.-P. Vader2 and F. R. Verdun1

1 University Institute of Radiation Physics (IRA-DUMSC), University of Lausanne, Grand-Pré 1, CH-1007 Lausanne, Switzerland
2 University Institute of Social and Preventive Medicine (IUMSP-DUMSC), University of Lausanne, Bugnon 17, CH-1005 Lausanne, Switzerland

* Corresponding author: abbas{at}aroua.com

Received April 20, 2006, amended August 28, 2006, accepted September 6, 2006


  Abstract

The age of the patient is of prime importance when assessing the radiological risk to patients due to medical X-ray exposures and the total detriment to the population due to radiodiagnostics. In order to take into account the age-specific radiosensitivity, three age groups are considered: children, adults and the elderly. In this work, the relative number of examinations carried out on paediatric and geriatric patients is established, compared with adult patients, for radiodiagnostics as a whole, for dental and medical radiology, for 8 radiological modalities as well as for 40 types of X-ray examinations. The relative numbers of X-ray examinations are determined based on the corresponding age distributions of patients and that of the general population. Two broad groups of X-ray examinations may be defined. Group A comprises conventional radiography, fluoroscopy and computed tomography; for this group a paediatric patient undergoes half the number of examinations as that of an adult, and a geriatric patient undergoes 2.5 times more. Group B comprises angiography and interventional procedures; for this group a paediatric patient undergoes a one-fourth of the number of examinations carried out on an adult, and a geriatric patient undergoes five times more.


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