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European Radiology

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01-07-2016 | Computed Tomography

Radiation dose reduction in paediatric coronary computed tomography: assessment of effective dose and image quality

Authors: Bouchra Habib Geryes, Raphael Calmon, Diala Khraiche, Nathalie Boddaert, Damien Bonnet, Francesca Raimondi

Published in: European Radiology | Issue 7/2016

Abstract

Objectives

To assess the impact of different protocols on radiation dose and image quality for paediatric coronary computed tomography (cCT).

Materials and methods

From January-2012 to June-2014, 140 children who underwent cCT on a 64-slice scanner were included. Two consecutive changes in imaging protocols were performed: 1) the use of adaptive statistical iterative reconstruction (ASIR); 2) the optimization of acquisition parameters. Effective dose (ED) was calculated by conversion of the dose-length product. Image quality was assessed as excellent, good or with significant artefacts.

Results

Patients were divided in three age groups: 0–4, 5–7 and 8–18 years. The use of ASIR combined to the adjustment of scan settings allowed a reduction in the median ED of 58 %, 82 % and 85 % in 0–4, 5–7 and 8–18 years group, respectively (7.3 ± 1.4 vs 3.1 ± 0.7 mSv, 5.5 ± 1.6 vs 1 ± 1.9 mSv and 5.3 ± 5.0 vs 0.8 ± 2.0 mSv, all p < 0,05). Prospective protocol was used in 51 % of children. The reduction in radiation dose was not associated with reduction in diagnostic image quality as assessed by the frequency of coronary segments with excellent or good image quality (88 %).

Conclusions

cCT can be obtained at very low radiation doses in children using ASIR, and prospective acquisition with optimized imaging parameters.

Key points

• Using ASIR allows 25 % to 41 % reduction in the ED.

• Prospective protocol is used up to 51 % of children after premedication.

• Low dose is possible using ASIR and optimized prospective paediatric cCT

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Title: Radiation dose reduction in paediatric coronary computed tomography: assessment of effective dose and image quality
Authors: Bouchra Habib Geryes
Raphael Calmon
Diala Khraiche
Nathalie Boddaert
Damien Bonnet
Francesca Raimondi
Publication date: 01-07-2016
Publisher: Springer Berlin Heidelberg
Published in: European Radiology / Issue 7/2016
Print ISSN: 0938-7994
Electronic ISSN: 1432-1084
DOI: https://doi.org/10.1007/s00330-015-4032-5

Keynote webinar | Spotlight on medication adherence

Springer Medicine

Radiation dose reduction in paediatric coronary computed tomography: assessment of effective dose and image quality

Abstract

Objectives

Materials and methods

Results

Conclusions

Key points

Keynote webinar | Spotlight on medication adherence

Springer Medicine

Abstract

Objectives

Materials and methods

Results

Conclusions

Key points

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