Dual Energy CT에서 Monoenergetic 영상을 이용한 금속성 인공음영 (Metal Artifact) 감소기법에 대한 연구
Dose Comparison according to the Tube Voltage, the Tube Current Change in CT Image
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초록
It is to find optimize quantity of ray that can decrease metal artifact caused by artificial hip joint, etc. when deciphering an image by monochromatic X-ray. To compare change of CT number value and noise value of metal artifact in animal tested image, 4 areas were selected and changed keV to measure CT number and noise value at each keV then CNR (Contrast to Noise Ratio) value is calculated. From computer analysis result, 62 keV is the point where can get the metal artifact minimized image, but this paper figured out that it is possible to get the metal artifact minimized image from 90 keV. Therefore, it is possible to get diagnosable image that minimized metal artifact by reconstruction in condition of 90 keV when having CT scan for patients who had artificial metal substance enthesis such as pedicle screw enthesis and artificial coxaenthesis.
Abstract
It is to find optimize quantity of ray that can decrease metal artifact caused by artificial hip joint, etc. when deciphering an image by monochromatic X-ray. To compare change of CT number value and noise value of metal artifact in animal tested image, 4 areas were selected and changed keV to measure CT number and noise value at each keV then CNR (Contrast to Noise Ratio) value is calculated. From computer analysis result, 62 keV is the point where can get the metal artifact minimized image, but this paper figured out that it is possible to get the metal artifact minimized image from 90 keV. Therefore, it is possible to get diagnosable image that minimized metal artifact by reconstruction in condition of 90 keV when having CT scan for patients who had artificial metal substance enthesis such as pedicle screw enthesis and artificial coxaenthesis.
참고문헌 (14)
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