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Pediatric Radiology
Published in: Pediatric Radiology 12/2015

01-11-2015 | Original Article

The impact of pediatric-specific dose modulation curves on radiation dose and image quality in head computed tomography

Authors: Joana Santos, Shane Foley, Graciano Paulo, Mark F. McEntee, Louise Rainford

Published in: Pediatric Radiology | Issue 12/2015

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Abstract

Background

The volume of CT examinations has increased with resultant increases in collective dose values over the last decade.

Objective

To analyze the impact of the tube current and voltage modulation for dose values and image quality of pediatric head CT examinations.

Materials and methods

Head CT examinations were performed on anthropomorphic phantoms and four pediatric age categories before and after the introduction of dedicated pediatric curves for tube voltage and current modulation. Local diagnostic reference levels were calculated. Visual grading characteristic image quality evaluation was performed by four pediatric neuroradiologists and image noise comparisons were performed.

Results

Pediatric-specific modulation curves demonstrated a 49% decrease in mean radiation dose for phantom examinations. The local diagnostic reference levels (CTDIvol) for clinical examinations decreased by 52%, 41%, 46% and 40% for newborn, 5-, 10- and 15-year-old patients, respectively. Visual grading characteristic image quality was maintained for the majority of age categorizations (area under the curve = 0.5) and image noise measurements did not change (P = 0.693).

Conclusion

Pediatric-specific dose modulation curves resulted in an overall mean dose reduction of 45% with no significant differences in subjective or objective image quality findings.
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Metadata
Title
The impact of pediatric-specific dose modulation curves on radiation dose and image quality in head computed tomography
Authors
Joana Santos
Shane Foley
Graciano Paulo
Mark F. McEntee
Louise Rainford
Publication date
01-11-2015
Publisher
Springer Berlin Heidelberg
Published in
Pediatric Radiology / Issue 12/2015
Print ISSN: 0301-0449
Electronic ISSN: 1432-1998
DOI
https://doi.org/10.1007/s00247-015-3398-5

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