Pediatric Radiology

, Volume 38, Issue 6, pp 645–656 | Cite as

Age-specific effective doses for pediatric MSCT examinations at a large children’s hospital using DLP conversion coefficients: a simple estimation method

  • Karen E. ThomasEmail author
  • Bo Wang
Original Article



There is a need for an easily accessible method for effective dose estimation in pediatric CT.


To estimate effective doses for a variety of pediatric neurological and body CT examinations in five age groups using recently published age- and region-specific dose length product (DLP) to effective dose conversion coefficients.

Materials and methods

A retrospective review was performed of 1,431 consecutive CT scans over a 12-week period using age- and weight-adjusted CT protocols. Age- and region-specific DLP to effective dose conversion coefficients were applied to console-displayed DLP data.


Effective dose estimates for single-phase head CT scans in neonatal, and 1-, 5-, 10- and 15-year-old age groups were 4.2, 3.6, 2.4, 2.0 and 1.4 mSv, respectively. For abdomen/pelvis CT scans the corresponding effective doses were 13.1, 11.1, 8.4, 8.9 and 5.9 mSv. The range of pediatric CT effective doses is wide, from ultralow dose protocols (<1 mSv) to extended-coverage body examinations (10–15 mSv).


Age- and region-specific pediatric DLP to effective dose conversion coefficients provide an accessible and user-friendly method for estimating pediatric CT effective doses that is available to radiologists working without medical physics support.


Pediatric MSCT DLP conversion coefficients Radiation dose Children 



We thank Guila BenDavid and her team of CT technologists for their diligent recording of DLP data, which made this study possible.


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Copyright information

© Springer-Verlag 2008

Authors and Affiliations

  1. 1.Department of Diagnostic ImagingThe Hospital for Sick ChildrenTorontoCanada

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