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Comparison of radiation doses between newborns and 6-y-old children undergoing head, chest and abdominal CT

Naruto Sugimoto1, Takahiko Aoyama, Shuji Koyama

  • 1Graduate school of Medicine, Nagoya University, Daikominami, Higashi-ku, Nagoya, Japan. s-naruto@umin.ac.jp

Radiation Protection Dosimetry
|May 31, 2012
PubMed

Insights

Radiation doses from paediatric computed tomography (CT) scans were measured using phantoms. Newborns and 6-year-olds received similar organ doses, but newborns had higher effective head CT doses.

Area of Science:

  • Medical Physics
  • Radiology
  • Pediatric Imaging

Background:

  • Computed tomography (CT) is a vital diagnostic tool in pediatric imaging.
  • Accurate assessment of radiation doses in pediatric CT is crucial for minimizing risks.
  • Variations in scanner technology may influence radiation exposure levels.

Purpose of the Study:

  • To investigate and compare radiation doses in recent pediatric CT scanners.
  • To evaluate organ and effective doses for newborn and 6-year-old pediatric phantoms.
  • To identify potential differences in radiation exposure between age groups.

Main Methods:

  • Utilized newborn and 6-year-old phantoms with implanted silicon-photodiode dosemeters.
  • Performed CT scans of the head, chest, and abdomen on the phantoms.
  • Measured organ doses (mGy) and calculated effective doses (mSv) for each scan type and phantom.

Main Results:

  • Organ doses for newborn and 6-year-old phantoms were comparable across head, chest, and abdominal CT.
  • Effective doses for newborns ranged from 2.1-3.3 mSv (head), 2.0-6.0 mSv (chest), and 2.2-10.0 mSv (abdomen).
  • Effective doses for 6-year-olds ranged from 1.0-2.0 mSv (head), 1.2-6.6 mSv (chest), and 2.9-11.8 mSv (abdomen).
  • Newborns exhibited 1.8 times higher effective doses in head CT compared to 6-year-olds.

Conclusions:

  • Radiation doses in pediatric CT are generally similar between newborn and 6-year-old phantoms.
  • Effective doses in head CT are notably higher for newborns, warranting careful consideration.
  • Findings highlight the importance of age-specific dose optimization in pediatric CT protocols.

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