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Radiation Protection Dosimetry Advance Access published online on February 3, 2006
Radiation Protection Dosimetry, doi:10.1093/rpd/nci737
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© The Author 2006. Published by Oxford University Press. All rights reserved. For Permissions, please email: journals.permissions@oxfordjournals.org

SCIENTIFIC AND TECHNICAL PAPER

PATIENT DOSIMETRY IN DIAGNOSTIC AND INTERVENTIONAL RADIOLOGY: A PRACTICAL APPROACH USING TRIGGER LEVELS

K. Faulkner 1 *, P. Ortiz-Lopez 2, and E. Vano 3

1 Quality Assurance Reference Centre, Unit 9 Kingfisher Way, Silverlink Business Park, Wallsend, Tyne and Wear NE28 9ND, UK
2 International Atomic Agency, P.O. Box 100, Wagrammer Strasse 5, Vienna A-1400, Austria
3 Medical Physics Service, San Carlos University Hospital and Radiology Department, Medicine School, Complutense University, 28040 Madrid, Spain

* To whom correspondence should be addressed.
K. Faulkner, E-mail: keith.faulkner{at}nhs.net


  Abstract

Patient dosimetry is performed in radiology and interventional radiology to assess whether deterministic injuries may occur and to establish the risk of stochastic effects. A fundamental problem for patient dosimetry is that no single quantity can be used to accurately assess both the risk of stochastic effects and whether deterministic injuries will occur following a specific examination or procedure. In cardiology and interventional radiology, two different approaches to patient dosimetry are commonly used. Effective dose is a quantity which correlates reasonably well with the risk of stochastic effects. Effective dose may be deduced from the dose-area product (DAP) for the procedure if sufficient information is known. DAP does not correlate with maximum skin dose, which may be used to predict whether deterministic injuries may occur. DAP meter readings may be used as a trigger level for the investigation of maximum skin entrance dose. Trigger levels for different procedures are proposed.


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