• Title/Summary/Keyword: 치과영상

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Image Evaluation according to Tube Current of X-ray Device for Intraoral Imaging (구내 촬영용 엑스선 장치의 관전류에 따른 영상 평가)

  • A Yeon Kim;Byungdu Jo;Seung-Jae Lee
    • Journal of the Korean Society of Radiology
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    • v.17 no.4
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    • pp.515-521
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    • 2023

  • The radiation dose received by the patient varies according to the tube current and time used during dental intraoral imaging. A large amount of tube current is required for image quality, but the radiation dose to the patient increases accordingly. Therefore, in this study, the optimal amount of tube current that can reduce the radiation dose received by the patient while securing the image quality was calculated through the evaluation of the image quality according to the tube current used during intraoral imaging through simulation. The average tube current, time, and tube voltage presented in the Guidelines for Diagnostic Reference Level for intraoral radiography were used as basic imaging conditions, and images were obtained when only the tube current was changed, and then the optimal tube current was compared and analyzed with the basic image quantity was calculated. Images were obtained by changing the tube current to 0.1, 0.5, 1, 2, 3, 4 and 5 mA under the basic conditions of 63 kV, 6 mA, and 0.29 s. The obtained image was evaluated for structural similarity index with the image taken under the condition of 6 mA using the ICY program. As a result, even under the condition of 0.5 mA tube current, the index of structural similarity with the image of 6 mA was evaluated to be high. Based on these results, it is considered that the radiation dose given to the patient can be greatly reduced if imaging is performed at 0.5 mA instead of 6 mA during dental intraoral imaging.

  • https://doi.org/10.7742/jksr.2023.17.4.515 인용 PDF HTML

임상가를 위한 특집 3 - 구강악안면영역에서 악성종양의 영상진단 : 상악골의 파괴를 동반한 악성종양의 영상진단

  • Heo, Gyeong-Hoe
    • The Journal of the Korean dental association
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    • v.47 no.10
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    • pp.647-655
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    • 2009

  • 지면의 한계 상 다양한 악성종양을 모두 다룰 수가 없어, 주로 상악에 발생하여 골 파괴를 야기하고 있는 증례들의 영상 소견을 소개하고자 한다. 악성종양의 진단 과정에는 보통 CT, MRI, PET/CT 등의 특수 장치들이 필요하지만, 개원의들이 일반 환자들의 진단과 치료 과정에서 흔히 접하게 되는 파노라마 방사선사진을 중심으로 하여, 악성종양들의 병인이나 기본적인 악성종양에 대한 설명 보다는 실제 임상 증례들을 통해 악성종양의 공통된 영상 소견 특징을 찾아보고자 한다.

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Development of Dental Light Robotic System using Image Processing Technology (영상처리 기술을 이용한 치과용 로봇 조명장치의 개발)

  • Moon, Hyun-Il;Kim, Myoung-Nam;Lee, Kyu-Bok
    • Journal of Dental Rehabilitation and Applied Science
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    • v.26 no.3
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    • pp.285-296
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    • 2010

  • Robot-assisted illuminating equipment based on image-processing technology was developed and then its accuracy was measured. The current system was designed to detect facial appearance using a camera and to illuminate it using a robot-assisted system. It was composed of a motion control component, a light control component and an image-processing component. Images were captured with a camera and following their acquisition the images that showed motion change were extracted in accordance with the Adaboost algorithm. Following the detection experiment for the oral cavity of patients based on image-processing technology, a higher degree of the facial recognition was obtained from the frontal view and the light robot arm was stably controlled.

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