S-Space College of Dentistry/School of Dentistry (치과대학/치의학대학원) Dept. of Dentistry (치의학과) Journal Papers (저널논문_치의학과)
Effect of ambient light and bit depth of digital radiograph on observer performance in determination of endodontic file positioning
- Heo, Min-Suk; Han, Dong-Hun; An, Byung-Mo; Huh, Kyung-Hoe; Yi, Won-Jin; Lee, Sam-Sun; Choi, Soon-Chul
- Issue Date
- Oral Surg Oral Med Oral Pathol Oral Radiol Endod 2008;105:239-44
To examine the effects of the luminance and bit depth of digital image on observer performance for determination of endodontic file positioning.
Using extracted premolar teeth, no. 08 K-file was placed into the canal and positioned so that the tip was either flush or 1 mm short of the radiologic root apex. The samples were imaged with both conventional and digital radiographs at 8 and 12 bits. Eleven observers read the images under dark and bright condition, and receiver operating characteristics analysis was performed. Additionally, the interpreting time was measured.
The 12-bit images showed similar observer performance compared with conventional images, and better than the 8-bit images. The interpretation time for bright condition and 8-bit images was longer than for dark condition and 12-bit images.
Twelve-bit digital images were preferred to 8-bit for accurate determination of endodontic file position.
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