Quantitative analysis of optical coherence tomography images for early natural enamel caries

VernacularTitle:早期自然釉质龋光学相干断层图像定量分析
Author: Xiaoli LIAN ; Hui YAO ; Yanni LI ; Yanyong XU ; Xiaohua DAI ; Linpu ZHANG
Publication Type:Journal Article
Keywords: Optical coherence tomography; Human extracted teeth; Early caries; Natural enamel caries; Quantitative analysis; Average gray value
From: International Journal of Biomedical Engineering 2011;34(5):257-260
CountryChina
Language:Chinese
Abstract: Objective Quantitative analysis of optical coherence tomography (OCT) images of naturally occurred early enamel caries was performed to find quantitative parameter indicator for detecting early caries by OCT.Methods Three human premolars with enamel natural caries in D0,D1,and D2 stages were selected respectively and scanned by OCT.The ratios of the average gray value of the caries region (object region) and sound region (background region),namely,the object-background contrast (OBC) were calculated in OCT images and selected as the quantitative parameters to analyze the OBC trend of different degree of enamel caries.Results Within the fixed depth,the OBC value showed a trend of first increase and then decrease with the severity of dental caries,indicating that OBC value increased with the severity of dental caries from normal to D1 stage,and then decreased from D1 to D2 stage.Conclusion The OBC value can be used as a new quantitative indicator for OCT to estimate the severity of naturally occurred early caries.