Pediatric body MDCT: a 5-year follow-up survey of scanning parameters used by pediatric radiologists.


Journal Article

OBJECTIVE: The purpose of this study was to evaluate how pediatric body MDCT scanning parameters (i.e., the principal determinants of radiation dose) have changed since a prior survey conducted in 2001. MATERIALS AND METHODS: The survey used in this study consisted of 27 questions addressing practice setting; equipment; and scanning parameters including kilovoltage, tube current, and pitch. Members of the Society for Pediatric Radiology (SPR) received an email with a link to the Web-based survey. Respondents were asked to complete only one survey to represent their practice and indicate the number of pediatric radiologists their response represented. RESULTS: Sixty-one responses representing 337 pediatric radiologists were received. Eighty-four percent of respondents practice in a university or children's hospital. No respondents reported using a peak kilovoltage setting of higher than 120 kVp for routine chest or abdomen scans. Those using 110 kVp or less increased from 4% to 48% for chest CT and from 1% to 32% for abdominal CT (p < 0.001). Weight-based adjustments in tube current are used by 98% of respondents. Tube current tends to increase with a patient's age or weight, with most pediatric body imaging examinations being performed with a tube current of less than 150 mA. The mean tube current used across all age groups decreased between 31 and 61 mA (p < 0.001), with the largest percentage decreases in patients in the 0-4 years age group. CONCLUSION: Since 2001, the peak kilovoltage and tube current settings, two principal parameters determining radiation dose, used by SPR members have decreased significantly for pediatric body MDCT. It is a reasonable assumption that these changes are due to efforts to increase awareness about the risks of radiation.

Full Text

Duke Authors

Cited Authors

  • Arch, ME; Frush, DP

Published Date

  • August 2008

Published In

Volume / Issue

  • 191 / 2

Start / End Page

  • 611 - 617

PubMed ID

  • 18647940

Pubmed Central ID

  • 18647940

Electronic International Standard Serial Number (EISSN)

  • 1546-3141

Digital Object Identifier (DOI)

  • 10.2214/AJR.07.2989


  • eng

Conference Location

  • United States