2025 Volume 28 Issue 1 Pages 33-40
Purpose: The purpose of this study is to compare the effective dose of whole-body CT for trauma between Japan and other countries.
Methods: This study was based on research for radiation exposure dose from whole-body CT for trauma in Japan that we reported in 2019. In this research, we corrected DLPs for CT examinations performed during 4-month period starting in August 2017. We converted DLP to effective doses using the conversion factors of effective dose per DLP.
Results: The median and maximum effective doses were 54.0 mSv, 8.4 mSv and 170.1 mSv, respectively. The effective dose exceeded 100 mSv in 48 cases (8％). We considered that these results were due to differences in scan protocols and scan phases of contrast enhancement CT.
Discussion: This study demonstrated that the effective radiation dose of whole-body CT for trauma in Japan is higher than that of other countries. Therefore, we considered that it is necessary to standardize the scan method for trauma whole-body CT in order to reduce radiation dose.
