Imaging Science in Dentistry

Korean Academy of Oral and Maxillofacial Radiology (대한영상치의학회)
권호 표지

A comparative study on the accuracy of digital subtraction radiography according to the aquisition methods of reconstructed images

재구성영상 형성방법에 따른 디지털영상공제술의 정확성 비교연구

  • Huh Young-June (Dept. of Oral and Maxillofacial Radiology and Dental Research Institute, College of Dentistry, Seoul National University) ;
  • Jeon In-Seong (Dept. of Dentistry, Inje University Sanggyepaik Hospital) ;
  • Heo Min-Suk (Dept. of Oral and Maxillofacial Radiology and Dental Research Institute, College of Dentistry, Seoul National University) ;
  • Lee Sam-Sun (Dept. of Oral and Maxillofacial Radiology, Dental Research Institute, and BK21, College of Dentistry, Seoul National University) ;
  • Choi Soon-Chul (Dept. of Oral and Maxillofacial Radiology, Dental Research Institute, and BK21, College of Dentistry, Seoul National University) ;
  • Park Tae-Won (Dept. of Oral and Maxillofacial Radiology and Dental Research Institute, College of Dentistry, Seoul National University) ;
  • Kim Jong-Dae (Division of Information and Communication Engineering, Hallym University)
  • 허영준 (서울대학교 치과대학 구강악안면방사선학교실 및 치학연구소) ;
  • 전인성 (인제대학교부속 상계백병원 치과학교실) ;
  • 허민석 (서울대학교 치과대학 구강악안면방사선학교실 및 치학연구소) ;
  • 이삼선 (서울대학교 치과대학 구강악안면방사선학교실, 치학연구소 및 BK21) ;
  • 최순철 (서울대학교 치과대학 구강악안면방사선학교실, 치학연구소 및 BK21) ;
  • 박태원 (서울대학교 치과대학 구강악안면방사선학교실 및 치학연구소) ;
  • 김종대 (한림대학교 정보통신학과)
  • Published : 2002.06.01
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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.

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