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Radiation Protection Dosimetry Advance Access published online on October 13, 2006
Radiation Protection Dosimetry, 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
Received April 20, 2006
Revised August 28, 2006
Accepted September 6, 2006

TECHNICAL NOTE

NUMBER OF X-RAY EXAMINATIONS PERFORMED ON PAEDIATRIC AND GERIATRIC PATIENTS COMPARED WITH ADULT PATIENTS

A. Aroua 1 *, F. O. Bochud 1, J.-F. Valley 1, J.-P. Vader 2, and F. R. Verdun 1

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

* To whom correspondence should be addressed.
A. Aroua, E-mail: abbas{at}aroua.com


  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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