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http://dx.doi.org/10.7742/jksr.2016.10.7.503

Analysis and Evaluation of Computed Tomography Dose Index (CTDI) of Pediatric Brain by Hospital Size  

Kim, Hyeonjin (Department of Radiological science, Kaya University)
Lee, Hyoyeong (Department of Radiological science, Dongeui University)
Im, Inchul (Department of Radiological science, Dongeui University)
Publication Information
Journal of the Korean Society of Radiology / v.10, no.7, 2016 , pp. 503-510 More about this Journal
Abstract
Even though children are exposed to the same amount of radiation, their effective dose amount is higher than those of adults. Therefore, it is very important to reduce the amount of unnecessary radiation exposure because children have a higher radiosensitivity and a smaller body size than adults. In this study, the proposal to seek ways to reduce the amount of radiation is drawn by comparing and analyzing CT Dose Index(CTDI) on the pediatric head CT which was performed at the Busan regional hospitals, to the national diagnostic reference levels. For this, the pediatric head CT scan was conducted among the CT equipments that were installed in downtown Busan. From 2,043 children 10 years old or less who were referred to the pediatric head CT scan, targeting the 28 CT equipments in the 24 hospitals that transmit dose reports to PACS, were examined retrospectively. As a result, the average value of CTDIvol, computed tomography dose index (CTDI) of infant brain, across the hospital, was 31.18 mGy, with DLP of $444.73mGy{\cdot}cm$, which exceeded the diagnostic reference level. The lower the age, the more management is needed for radiation. However, the reality is that the CT examinations are being conducted with a dose that exceeds the reference level as the age of the aged is exceeded. For this purpose, the study seeks to determine the degree of doses of doses outside the diagnostic reference level and analyze the cause of the excess dose and devise measures to reduce the dose reduction.
Keywords
Computed tomography dose index; Diagnostic reference level; Hospital size; Confidence interval;
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