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Evaluation Of Image-Enhanced Paediatric Computed Tomography Brain Examinations

Artikel i vetenskaplig tidskrift
Författare Kerstin Ledenius
F Stålhammar
Lars-Martin Wiklund
C Fredriksson
A Forsberg
Anne Thilander-Klang
Publicerad i Radiation protection dosimetry
Volym 139
Nummer/häfte 1-3
Sidor 287-292
ISSN 1742-3406
Publiceringsår 2010
Publicerad vid Institutionen för kliniska vetenskaper, Avdelningen för radiofysik
Sidor 287-292
Språk en
Länkar dx.doi.org/10.1093/rpd/ncq097
Ämneskategorier Radiofysik, Diagnostisk radiologi

Sammanfattning

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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