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| Study on the effective dose of chest DR at different kilovolt conditions using children's anthropomorphic phantom |
| WANG Xiankai1,2,3, LI Hailiang1, CHEN Yingmin1, ZHANG Lin1, LIU Wei1 |
1. Institute of Radiation Medicine Shandong Academy of Medical Sciences, Shandong First Medical University & Shandong Academy of Medical Sciences, Jinan 250062 China;
2. School of Medicine and Life Sciences, University of Jinan-Shandong Academy of Medical Sciences;
3. Department of Radiology, Jining No.1 People's Hospital |
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Abstract Objective The absorbed dose of tissues and organs of the 1-year old children under different kilovolt conditions was measured by anthropomorphic phantom, and the effective dose under different kilovolt conditions was estimated and compared.Methods The thermoluminescence dosimeter (TLD) assembled in the plastic tube was placed into the socket reserved for the anthropomorphic phantom of children, and exposed 20 times at 60, 70, 80 and 90 kV respectively in the automatic exposure control (AEC) mode, then the TLD was recovered and measured in the laboratory. The absorbed dose of tissues and organs under different kilovolt conditions was calculated and the effective dose of children was estimated respectively.Results The absorbed dose of all tissues and organs in the radiation field decreases gradually with the increase of kilovolt at 60, 70, 80 and 90kV.The effective doses in the 4 experimental groups were 0.43, 0.34, 0.29 and 0.23 μSv respectively.Conclusion The use of higher kilovolt radiography in the chest of infants can reduce the absorbed dose of tissues and organs and the effective dose of the whole body.
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Received: 23 July 2019
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