조리개형 X선 콜리메이터의 개발에 따른 유용성 평가

• Published in: 방사선기술과학 Vol. 41; no. 3; pp. 249 - 254
• Main Authors: 강인석(In-Seog Kang), 박재윤(Jae-Yoon Park), 임청환(Cheong-Hwan Lim), 최재호(Jae-Ho Choi), 정홍량(Hong-Ryang Jung)
• Format: Journal Article
• Language: Korean
• Published: 대한방사선과학회(구 대한방사선기술학회) 30.06.2018; KOREAN SOCIETY OF RADIOLOGICAL TECHNOLOGY; 대한방사선과학회
• Subjects: 방사선과학; IRIS; DAP; 선원 검출기간 거리; 조리개; 조사야; Collimator; Radiation field Size; 콜리메이터; 면적선량; SID
• ISSN: 2288-3509; 2384-1168
• DOI: 10.17946/JRST.2018.41.3.249

In this study, we evaluated the DAP(Dose Area Product) reduction effect of the newly developed IRIS collimator by measuring the DAP of the Rectangle collimator and the IRIS collimator depending on the field, SID(Source to Image recpetor Distance) change, and AEC mode use. The results were as follows. The IRIS collimator decreased DAP by 34.91, 29.33, and 29.04%, respectively, compared to the Rectangle collimator when the field was increased to $8{\times}8$, $12{\times}12$, $16{\times}16inch$. And also, when the SID was increased to 100, 120 and 140 cm, the IRIS collimator decreased DAP by 10.73, 33.68 and 46.22%, respectively, compared to the Rectangle collimator. In AEC mode and none-AEC mode, DAP in IRIS collimator was reduced by 32.71 and 21.69%, respectively, compared with the Rectangle type. The IRIS collimator can reduce DAP by 29.62% on average compared to Rectangle type, which is statistically significant. These results suggest that the newly developed IRIS collimator can be used in medical field to alleviate radiation exposure.