Variation in computed tomography radiation dose in community hospitals
Related Experiment Video
Updated: May 21, 2026

Expedited Radiation Biodosimetry by Automated Dicentric Chromosome Identification (ADCI) and Dose Estimation
Published on: September 4, 2017
Catherine Calvert1, Keith J Strauss, David P Mooney
1Children's Hospital Boston and Harvard Medical School, Boston, MA 02115, USA.
Insights
Pediatric radiation exposure from trauma computed tomographic (CT) scans varies widely across hospitals. Minimizing radiation dose is crucial when CT scans are necessary for evaluating injured children.
Area of Science:
- Pediatric radiology
- Medical imaging safety
- Radiation dose optimization
Background:
- Radiation dose in pediatric trauma evaluations is a significant concern.
- Minimizing radiation exposure is essential for patient safety.
- Computed tomographic (CT) scans are frequently used in trauma assessments.
Purpose of the Study:
- To determine the radiation dose delivered during abdominal/pelvic CT scans for trauma in children.
- To assess variability in radiation doses across community hospitals.
Main Methods:
- Retrospective review of consecutive pediatric trauma patients who underwent abdominal/pelvic CT scans.
- Dose information was obtained from CT reports or direct hospital contact.
- An age-standardized dose ratio was generated for analysis.
Main Results:
- 150 pediatric patients from 40 hospitals were analyzed.
- Radiation doses ranged from 0.17 to 5.07 times the national norm.
- Half of the patients received doses below the national 75th percentile, while the other half exceeded it.
Conclusions:
- Significant variability exists in radiation dosage for pediatric trauma CT scans across hospitals.
- When CT is necessary, adjusting scanner settings to the lowest effective dose is recommended.
- Further efforts are needed to standardize radiation doses in pediatric trauma imaging.
Purpose:
Concerns abound regarding the radiation dose administered to children during trauma evaluations. It is important to minimize the radiation dose administered when a computed tomographic (CT) scan is performed. This study was carried out to determine the radiation dose delivered during trauma abdominal/pelvic CT scans performed in community hospitals.
Methods:
Data on consecutive children transferred after abdominal/pelvic CT scan for trauma were reviewed. Dose information was retrieved directly from reports provided, or the hospital was contacted directly, and an age-standardized dose ratio was generated.
Results:
One hundred eighty-six patients were identified, and 36 patients were excluded, leaving 150 patients from 40 different hospitals. Half received radiation doses that were less than the national 75th percentile norm, and half received radiation doses that were greater, overall ranging from 0.17 to 5.07 times.
Conclusions:
Radiation exposure is a concern among those who evaluate injured children. Although not performing a CT scan may be the best way to reduce the dose, when a CT scan is deemed necessary, the scanner must be adjusted to the lowest possible settings necessary to obtain the information desired. This study identified a thirty-times range of radiation dosage for CT scans performed across 40 different hospitals.
Related Concept Videos
Computed Tomography
The technique was invented in the 1970s and is based on the principle that as X-rays pass through the body, they are absorbed or reflected at different levels. In the technique, a patient lies on a motorized platform while a computerized axial tomography (CAT) scanner rotates...
Radiological Investigation I: X-ray and CT
Imaging Studies III: Computed Tomography
Biological Effects of Radiation
X-ray Imaging
Imaging Studies I: CT and MRI
Description of the Procedures
Computed Tomography (CT) scan:
Computed Tomography (CT) scans use X-ray technology to generate detailed images of bones, organs, and tissues. During the scan, the patient lies on a moving table...

