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KMID : 1151820130070030175
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Journal of the Korean Society of Radiology
2013 Volume.7 No. 3 p.175 ~ p.179
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Comparison of Dose Depending on the Position when Shooting Panorama and CBCT
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Jeong Cheon-Soo
Kim Chong-Yeal
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Abstract
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To find out the appropriate defensive measures for protectors and radiation workers in rotating radiation generating devices such as CBCT and panorama, irradiation dose depending on the position was compared and analyzed. The devices such as panorama DP-90-P PAX-500 (Vatech, Korea) and CBCT DCT-90-P IMPLAGRAPHY Dental CT system (Vatech, Korea) were used. As irradiation dose measuring instruments, Ion chamber model 2026 and Reader 20X5-60E were used. The exposure conditions were set as the factor used in the clinical trial. The result of the experiment showed that panorama was the highest, 81μR, at point A where the test starts first and the lowest, 53μR, at point D where the test ends. In case of CBCT, it was the highest, 1,021μR, at point D where the test ends and was measured as the highest, 809.67μR, at point A where the test starts. If protectors and radiation workers are forced to examine a patient holding him, they should be positioned in the middle of the point where X ray tube starts to rotate and the point where it ends to avoid the position where radiation dose is the most. And due to the nature of equipment, it will be the safest for them to stand at the opposite side of the machine and to uphold it from the rear rather than upholding it from the side of a patient and they should wear appropriate the protection gear.
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KEYWORD
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dental radiation dose, CBCT, panoram
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