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KMID : 0357520180410030249
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Journal of Radiological Science and Technology
2018 Volume.41 No. 3 p.249 ~ p.254
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Usability Evaluation by Development of IRIS Type X-ray Collimator
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Kang In-Seog
Park Jae-Yoon
Lim Cheong-Hwan
Choi Jae-Ho
Jung Hong-Ryang
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Abstract
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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 8×8, 12×12, 16×16 inch. 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.
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KEYWORD
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Collimator, IRIS, DAP, Radiation field Size, SID
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