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Evaluation Of Image-Enhanced Paediatric Computed Tomography Brain Examinations

Journal article
Authors Kerstin Ledenius
F Stålhammar
Lars-Martin Wiklund
C Fredriksson
A Forsberg
Anne Thilander-Klang
Published in Radiation protection dosimetry
Volume 139
Issue 1-3
Pages 287-292
ISSN 1742-3406
Publication year 2010
Published at Institute of Clinical Sciences, Department of Radiation Physics
Pages 287-292
Language en
Links dx.doi.org/10.1093/rpd/ncq097
Subject categories Radiological physics, Diagnostic radiology

Abstract

The aim of this study was to evaluate the possibility of reducing the radiation dose to paediatric patients undergoing computed tomography (CT) brain examination by using image-enhancing software. Artificial noise was added to the raw data collected from 20 patients aged between 1 and 10 y to simulate tube current reductions of 20, 40 and 60 mA. All images were created in duplicate; one set of images remained unprocessed whereas the other was processed with image-enhancing software. Three paediatric radiologists assessed the image quality based on their ability to visualise the high- and low-contrast structures and their overall impression of the diagnostic value of the image. For patients aged 6-10 y, it was found that dose reductions from 27 mGy (CTDI(vol)) to 23 mGy (15 %) in the upper brain and from 32 to 28 mGy (13 %) in the lower brain were possible for standard diagnostic CT examinations when using the image-enhancing filter. For patients 1-5 y, the results for standard diagnostics in the upper brain were inconclusive, for the lower brain no dose reductions were found possible.

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