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재구성영상 형성방법에 따른 디지털영상공제술의 정확성 비교연구
A comparative study on the accuracy of digital subtraction radiography according to the aquisition methods of reconstructed images

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Authors
허영준; 전인성; 허민석; 이삼선; 최순철; 박태원; 김종대
Issue Date
2002-06
Publisher
대한구강악안면방사선학회
Citation
Korean J Oral Maxillofac Radiol 2002;32:107-111
Keywords
subtraction techniqueradiographydentaldigitalradiographic image interpretationcomputer assisted
Abstract
Purpose : To compare the accuracy of digital subtraction images acquired by two different methods different in positioning four reference points for geometrical standardization. Materials and Methods : A total of 36 digital radiographic images of 6 volunteers were taken at the areas of the incisor, premolar, and molar of both the maxilla and mandible using the Digora system. Each image was moved 4 mm vertically and horizontally. Four oral and maxillofacial radiologists performed digital subtraction radiography between the paired images before and after movement using Emago (Oral Diagnostic Systems, Amsterdam, The Netherlands) and Sunny (Biomedisys Co., Seoul, Korea). The standard deviation of the internal gray value in Region of Interest (ROI) was statistically analyzed between the two programs using the paired t-test. Results : The standard deviation of pixel gray values from the digital subtraction images using the Sunny program were lower than that of the Emago program (p<0.05). All observers showed significant differences between each other when the Sunny program was used (p<0.05), but one observer showed a significantly higher score than other observers when they used Emago (p<0.05). The standard deviations of premolar area from both Sunny and Emago programs were significantly higher than those of anterior and molar regions (p<0.05). Conclusion: The subtracted images using the Sunny program were more accurate and sensitive than those taken using the Emago program.
ISSN
1229-8212
Language
Korean
URI
http://hdl.handle.net/10371/74054
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College of Dentistry/School of Dentistry (치과대학/치의학대학원)Dept. of Dentistry (치의학과)Journal Papers (저널논문_치의학과)
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