Evaluation of scattered dose of highly radiosensivity major organ during computed tomography examination

Abstract

Background/Objectives: We made an attempt to measure the scattering dose of space, surface, and deep region focusing on organs that are sensitive to radiation during CT examination and compare their characteristics. Methods/Statistical analysis: To conduct the experiment, we used 64-Slice MDCT for CT Scanner and Rando Phantom. For dose measurement, first, we used a Survey meter to measure space scattering dose, second, to measure incident surface dose, we used OSLD nanodot, and third, to measure deep dose, we used a glass dosimeter.The choice of the location for the measurement of radiation dose was based on organs that are susceptible to radiation, namely Orbit for Head, Breast for Chest, and Godnad for Abdomen.Findings: In the head CT scan, at breast,the space dose was 48.2 ± 0.34 µSv, the surface dose was 82.0 ± 2.29 µSv and the deep dose was 376.0 ± 1.58 µSv. In the Gonad, the space dose was 9.7 ± 0.02 µSv, the surface dose was 20.0 ± 1.36 µSv, and the deep dose was 12.0 ± 1.27µSv. In the chest CT scan, at orbit,the space dose was 229.0 ± 2.85 µSv, the surface dose was 167.0 ± 1.27 µSv and the deep dose was 506.0 ± 1.58 µSv. In the Gonad, the space dose was 72.6 ± 0.41 µSv, the surface dose was 96.9 ± 1.53 µSv, and the deep dose was 190.0 ± 1.58µSv. In the abdomen CT scan, at orbit,the space dose was 68.7 ± 0.34 µSv, the surface dose was 72.0 ± 1.36 µSv and the deep dose was 224.0 ± 1.58 µSv. In the Breast, the space dose was 145.2 ± 1.57 µSv, the surface dose was 4597.0 ± 1.27 µSv, and the deep dose was 9137.0 ± 1.27µSv Improvements/Applications: It seems necessary to make constant efforts to reduce the dose of radiation by optimizing the radiation protection by blocking the space other than the main flux.