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학제간연구 과학기술학 뇌인지과학 기술정책 기타 복합학

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논문 기본 정보

자료유형
학술저널
저자정보
Hoon Ji (Korea Institute of Radiological and Medical Sciences) Su Chul Han (Korea Institute of Radiological and Medical Sciences) Jong Hyeun Baek (Tongmyong University) Dong Hoon Lee (Tongmyong University) Seungwoo Park (Korea Institute of Radiological and Medical Sciences)
저널정보
대한전기학회 Journal of Electrical Engineering & Technology Journal of Electrical Engineering & Technology Vol.13 No.2
발행연도
2018.3
수록면
936 - 942 (7page)

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초록· 키워드

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The diagnostic multi-leaf collimator preventing unnecessary dose from entering into patients during the diagnostic examination was made in this study. The movement of the entire 50 leaves was embodied with the group of 25 ones thereof configured in a pair facing each other on the left and right of the median line. Dimensions of the length, width, and height of each shielding leaf were 5×0.5×0.5㎤ resulting in the maximum boost field of 10×10cm². The material of multi-leaf collimator had the excellence on the machinability with the use of the SKD-11 alloy tool steel having the high wear resistance against frequent movement, and it was devised to control both-side’s shielding leaves by moving 2 motors unlike existing remedial multi-leaf collimator that use as many motors as the number of 50 shielding leaves. Thereafter, the transmission dose of leaves, cross-leaf leakage dose, and inter-leaf leakage dose were measured by the developed multi-leaf collimator attached to X-ray equipment. An ionization chamber was used to detect doses there from, and the comparative analysis was carried out by means of the radiographic film that was easy to detect the dose leakage in between each leaf. Results obtained from the test conducted in comparative analysis yielded approximately 98%, 96%, and 94% of shielding efficiency realized at each level of energy of 80kV, 100kV, and 120kV it was confirmed there was no dose leakage resulted from the varied level of irradiation energy. Thus the multi-leaf collimator to be developed based on this study is thought that it could fully reduce the unnecessary dose to patients in the diagnostic test and the shielding efficiency thereof is expected to be increasing if it is made in a miniaturized form with a way of increasing the thickness of each leaf later for an extended application to general diagnostic purposes.
#Diagnostic multi-leaf-collimator #Ionization chamber #Gafchromic film #Dose reduction #Shielding

목차

Abstract
1. Introduction
2. Design and Implementation of Multi-leaf Collimator for Diagnosis
3. Evaluation of the Utility of Developed Multi-leaf Collimator
4. Results of the Evaluation of Utility
5. Conclusions
References

참고문헌 (18)

참고문헌 신청
Tsapaki V, Aldrich JE, Sharma R, Staniszewska MA., Krisanachinda A. et al. “Dose reduction in CT while maintaining diagnostic confidence: diagnostic reference levels at routine head, chest, and abdominal CT-IAEA-coordinated research project,” Radiology, vol. 240, no. 3, pp. 828-834, Jul. 2006. Han S, Lee B, Shin G, Choi J, Kim J et al. “Dose area product measurement for diagnostic reference levels and analysis of patient dose in dental radiography,” Radiat Prot Dosim, vol. 150, no. 4, pp. 523-531, Dec. 2012. Shortt, C. P., Fanning, N. F., Malone, L., Thornton, J., Brennan, P. and Lee, M. J. “Thyroid dose during Neurointerventional procedure: does lead shielding reduces the dose?” Cardiovascular Interv Radiol, vol. 30, no. 5, pp. 922-927, May. 2007. Han SC, Kwon SC. “Radiation dose reduction to the critical organ with bismuth shielding during endovascular coil embolisation for cerebral aneurysms,” Radiat Prot Dosim, vol. 156, no. 3, pp. 364-371, Mar. 2013. Hopper, K. D., Neuman, J. D., King, S. H. and Kunselman, A. R. “Radioprotection to the eye during CT scanning,” AJNR Am J Neuroradiol, vol. 22, no. 6, pp. 1194-1198, Jun. 2001.

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