Journal of Korean Academy of Oral and Maxillofacial Radiology (치과방사선)

Korean Academy of Oral and Maxillofacial Radiology (대한영상치의학회)
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AN EXPERIMENTAL STUDY ON THE DETECT ABILITY OF DIGITAL RADIOGRAPHIC IMAGES

방사선 사진을 이용한 계수 영상의 판독능에 관한 실험적 연구

  • Sohn Young-Soon (Department of Dental Radiology, College of Dentistry, Puson National University) ;
  • Cho Bong-Hae (Department of Dental Radiology, College of Dentistry, Puson National University) ;
  • Nah Kyung-Soo (Department of Dental Radiology, College of Dentistry, Puson National University)
  • 손영순 (부산대학교 치과대학 치과방사선학 교실) ;
  • 조봉혜 (부산대학교 치과대학 치과방사선학 교실) ;
  • 나경수 (부산대학교 치과대학 치과방사선학 교실)
  • Published : 1994.12.01
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Abstract

The comparative detectability of the artificial defects among conventional radiographs, digital images and digital subtraction images was evaluated. The artificial defects were made within spogy bone of 24 unilateral mandibles of adult dogs. The results were as follows: 1. With normal exposure time, the detectability of digital subtraction radiographs was 90.3% which was statistically significant superior to those of conventional radiographs(78.0%) and digital images(75.9%) (p<0.05). 2. With half-exposure time, the detectability of conventional radiographs, digital images and digital subtraction radiographs was 68.4%, 67.3% and 69.9% respectively. There was no statistical significant difference among the detectability of these methods(p>0.05). 3. All radiographic images with normal exposure time showed statistically significant superior detectability to those with half-exposure time(p<0.05). 4. The detectability of digital subtraction radiographs was not linearly related to the standard deviation of the grey levels of reference line(p<0.05).

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