S-Space College of Dentistry/School of Dentistry (치과대학/치의학대학원) Dept. of Dentistry (치의학과) Journal Papers (저널논문_치의학과)
ROI-based image registration for digital subtraction radiography
- Choi, Soon-Chul; Yi, Won-Jin; Heo, Min-Suk; Lee, Sam-Sun; Huh, Kyung-Hoe
- Issue Date
- Oral Surg Oral Med Oral Pathol Oral Radiol Endod 2006;101:523-529.
We evaluated the influence of surrounding anatomical structures on the registration accuracy of a diagnostically important region, by varying the ROI (region of interest) window used in an automatic ROI-based digital subtraction method.
Pairs of radiographs were taken at 2 molar regions using paralleling techniques of XCP devices (Rinn Co., Elgin, Ill) attached with and without a bite block. The global and local registration accuracies were measured by the RMS (root mean square) of subtraction images for various ROIs.
No significant differences were found in global registration accuracies among various ROI sizes in all the paralleling techniques. The local registration accuracies decreased with extension of the ROI size.
Registration using an ROI restricted to the anatomical region of diagnostic interest provides higher accuracy than using a larger ROI.
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