J. Damilakis

Medical X-ray imaging is in a phase of rapid development. New methods capable of producing high-quality images in the shortest time such as multi slice computed tomography (MSCT) are introduced in the clinical environment at a great pace. The purpose of this site is to provide a source of information and educational material in specific important issues of radiation protection in diagnostic radiology for medical physicists, radiologists, technologists and other members of the health care sector.



A marked increase in the applications and use of multislice CT (MSCT) imaging has been observed over the last few years. CT has been reported to constitute 11% of all medical x-ray exposures, contributing up to 67% of the total radiation dose burden to the general population. As a consequence, several investigators have voiced their concern about radiation risks associated with CT, stressing the need for appropriate justification and optimization of CT imaging procedures. The powerpoint presentation on 'Dose Management in MSCT' answers 3 questions related to MSCT radiation protection and dosimetry: a) Are the doses from a MSCT examination high? b) What are the radiation risks? and c) How can we manage patient dose? 



Diagnostic x-ray examinations result in radiation exposure to many pregnant patients each year, either accidentally or because of clinical urgency. In the case of intentional exposure, a study should be selected that keeps radiation dose to the unborn child at a minimum. All the appropriate measures should be taken to avoid accidental irradiation of pregnant patients. Conceptus doses from diagnostic x-ray studies can rarely exceed 100 mGy. Doses to the unborn child below 100 mGy should not be considered a reason for abortion.

Pregnant employees are also exposed to diagnostic radiation. A radiation protection program for pregnant employees working in diagnostic radiology should be implemented to protect the conceptus and help the pregnant worker in obtaining the information necessary to perform her job safely.

The powerpoint presentation on 'Pregnancy and Diagnostic X-rays' presents an overview of the discussion concerning the exposure of pregnant patients to x-rays as well as the occupational exposure of pregnant employees in worklaces.

John Damilakis, PhD
Assistant Professor of Medical Physics
University of Crete
Faculty of Medicine
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