Automatic Joint Teeth Segmentation in Panoramic Dental Images using Mask R-CNN with Residual Feature Extraction
Can it be useful in Oral Cancer Diagnosis and Management?
DOI:
https://doi.org/10.59667/sjoranm.v12i1.18Keywords:
Panoramic radiography, Tooth segmentation, Mask R-CNN, Residual learning, Medical image analysisAbstract
Introduction
Panoramic dental radiographs provide an overview of the teeth, jaws, and surrounding structures. Automated segmentation may support the quantitative analysis of dental images. This study evaluated a modified Mask R-CNN approach with residual feature extraction for the segmentation of individual teeth in panoramic radiographs.
Material and Methods
A sequence of residual blocks was used to construct a reported 62-layer feature extraction network for a modified Mask R-CNN (MRCNN). The UFBA-UESC and Tufts dental image datasets comprised 2,500 panoramic radiographs: 1,800 were assigned to training, 448 to validation, and 252 to testing.
Results
The modified model achieved a reported training accuracy of 99.67% and validation accuracy of 98.94%. Averaged across validation runs, the author-reported corrected Dice score was 98.67%, intersection over union (IoU) was 97.8%, and pixel accuracy was 96.53%. On the separate test set of 252 radiographs, the Dice scores were 96.0% for the modified model and 83.0% for the original model. Training, validation, and test metrics are reported separately.
Conclusion
The findings support the potential of the proposed approach for automated tooth segmentation in panoramic dental radiographs. Accurate delineation of individual teeth may provide a useful component for future computer-assisted dental image analysis. Its possible contribution to oral cancer assessment, treatment planning, or follow-up requires dedicated clinical validation, as these applications were not evaluated in the present study.
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Data Availability Statement
The public datasets are identified in references 1 and 19, and the cited software repository in reference 20. Complete study-specific split files, the exact modified-model implementation, and individual validation-run results are not available for verification in this revision.
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Copyright (c) 2024 Raghavendra H. Bhalerao, Abhijeet Ashok Salunke, Shristi Sharan, Kamlesh Kumar, Priyank Rathod, Prince Kumar, Manish Chaturvedi, Nandlal Bharwani, Krupa Shah, Dhruv Patel, Keval Patel, Vikas Warikoo, Manisha Abhijeet Salunke, Shashank Pandya

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