A study carried out by the Massachusetts General Hospital and Harvard Medical School found that estimated radiation doses are significantly lower for pediatric CT exams of the brain that employ an adaptive statistical iterative reconstruction technique (ASIR) as opposed to those that did not employ ASIR.
Additionally, the researchers discovered that the brain and salivary gland doses were considerably lower for ASIR-enabled exams as opposed to those without ASIR technique. However, no differences in the estimated organ doses were discovered for the thyroid gland, skeleton, and eye lenses across the two groups of CT exams.
"CT radiation dose is an important concern with all imaging sites, especially for children. We performed this study to do a preliminary analysis of pediatric head CT examinations and to assess the factors influencing radiation doses," said Ranish Deedar Ali Khawaja.
Average radiation dose was set at 1.6 ± 1.5 mSv (estimated effective dose) in pediatric head CT. Furthermore, to the iterative reconstruction algorithm, patient age and effective body diameter notably carried enough weight to impact the doses.
Khawaja and his fellow researchers presented their study at the 2014 ARRS Annual Meeting in San Diego, CA.