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Pediatric Radiology
Published in: Pediatric Radiology 8/2014

01-08-2014 | Original Article

Nationwide radiation dose survey of computed tomography for fetal skeletal dysplasias

Authors: Osamu Miyazaki, Hideaki Sawai, Jun Murotsuki, Gen Nishimura, Tetsuya Horiuchi

Published in: Pediatric Radiology | Issue 8/2014

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Abstract

Background

Recently, computed tomography (CT) has been used to diagnose fetal skeletal dysplasia. However, no surveys have been conducted to determine the radiation exposure dose and the diagnostic reference level (DRL).

Objective

To collect CT dose index volume (CTDIvol) and dose length product (DLP) data from domestic hospitals implementing fetal skeletal 3-D CT and to establish DRLs for Japan.

Materials and methods

Scan data of 125 cases of 20 protocols from 16 hospitals were analyzed. The minimum, first-quartile, median, third-quartile and maximum values of CTDIvol and DLP were determined. The time-dependent change in radiation dose setting in hospitals with three or more cases with scans was also examined.

Results

The minimum, first-quartile, median, third-quartile and maximum CTDIvol values were 2.1, 3.7, 7.7, 11.3 and 23.1 mGy, respectively, and these values for DLP were 69.0, 122.3, 276.8, 382.6 and 1025.6 mGy·cm, respectively. Six of the 12 institutions reduced the dose setting during the implementation period.

Conclusions

The DRLs of CTDIvol and DLP for fetal CT were 11.3 mGy and 382.6 mGy·cm, respectively. Institutions implementing fetal CT should use these established DRLs as the standard and make an effort to reduce radiation exposure by voluntarily decreasing the dose.
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Metadata
Title
Nationwide radiation dose survey of computed tomography for fetal skeletal dysplasias
Authors
Osamu Miyazaki
Hideaki Sawai
Jun Murotsuki
Gen Nishimura
Tetsuya Horiuchi
Publication date
01-08-2014
Publisher
Springer Berlin Heidelberg
Published in
Pediatric Radiology / Issue 8/2014
Print ISSN: 0301-0449
Electronic ISSN: 1432-1998
DOI
https://doi.org/10.1007/s00247-014-2916-1

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