치과방사선 (Journal of Korean Academy of Oral and Maxillofacial Radiology)
- 제28권2호
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- Pages.415-433
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- 1998
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- 1225-049X(pISSN)
Digora$\textregistered$ 영상시스템을 이용한 인접면 인공 치아우식병소의 진단능에 관한 연구
A Study on the Diagnostic Detection Ability of the Artificial Proximal Caries by Digora$\textregistered$
- Oh Kyung-Ran (Department of Oral and Maxillofadal Radiology, College of Dentistry, Chosun University) ;
- Choi Eui-Hwan (Department of Oral and Maxillofadal Radiology, College of Dentistry, Chosun University) ;
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Kim Jae-Duk
(Department of Oral and Maxillofadal Radiology, College of Dentistry, Chosun University)
- 발행 : 1998.08.01
초록
Digora system is an intraoral indirect digital radiography system utilizing storage phosphor image plate. It has wide dynamic range which allows it to decrease the patient s exposure time and may increase diagnostic ability through image processing (such as edge enhancement, grey scale conversion, brightness change, and contrast enhancement). And also, it can transmit and storage image information. The purpose of this study was to evaluate the diagnostic ability of artificial proximal caries between Conventional radiograph and Digora images(unenhanced image, brightness & contrast controlled image, and edge enhanced image). ROC(Receiver Operating Characteristic) analysis, paired t-tests, and F-tests were done for the statistical evaluation of detectability. The following results were acquired: 1. In Grade I lesions, the mean ROC areas of Conventional radiograph, Digora unenhanced image, Digora controlled image, and Digora edge enhanced image were 0.953, 0.933, 0.965, 0.978 (p>0.05). 2. In Grade II lesions, the mean ROC areas of Conventional radiograph, Digora unenhanced image, Digora controlled image, and Digora edge enhanced image were 0.969, 0.964, 0.988, 0.994. Among theses areas, there was just statistical significance between Diagnostic abilities of Digora edge enhanced image and Conventional radiograph (p<0.05). 3. In the Interobserver variability, the ROC curve areas of Digora edge enhanced image was lowermost in these areas, regardless of the Carious lesion depths. In conclusion, intraoral indirect digital system, Digora system, has the potential possibility as an alternative of Conventional radiograph in the diagnosis of proximal caries.