Korean J Oral Maxillofac Radiol.
2001 Mar;31(1):23-34.
A study on the geometric correction for the digital subtraction radiograph
- Affiliations
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- 1Department of Oral and Maxillofacial Radiology, School of Dentistry, Chonbuk National University, Korea. radkoh@moak.chonbuk.ac.kr
- 2Institute of Oral Bio Science, Chonbuk National University, Korea.
Abstract
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PURPOSE: To develop a new subtraction program for registering digital periapical images based on the correspon-dence of anatomic structures.
MATERIALS AND METHODS
The digital periapical images were obtained by Digora system with Rinn XCP equipment after translation of 1-16 mm, and rotation of 2-20degrees at the premolar and molar areas of the human dried mandible. The new subtraction program, NIH Image program and Emago/Advanced program were compared by the peak-signal-to noise ratio (PSNR).
RESULTS
The new subtraction program was superior to NIH Images program and Emago/Advanced program up to 16 mm translation and horizontal angulation up to 4degrees.
CONCLUSION
The new subtraction program can be used for subtracting digital periapical images.
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