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Analysis of linear measurements on 3D surface models using CBCT data segmentation obtained by automatic standard
Marcelo Lupion Poleti1, Thais Maria Freire Fernandes2, Otávio Pagin3
1Paraná Federal Institute of Education, Science and Technology, Rua João XXIII, 600 - Jardim Dom Bosco, Londrina, PR, 86060-370, Brazil. marcelo_poleti@yahoo.com.br.
Clinical Oral Investigations
|May 13, 2015
Summary
This study found that linear measurements on three-dimensional (3D) surface models from Dolphin and InVesalius software are reliable and accurate. These 3D models offer a realistic approach for diagnosis and treatment planning.
Area of Science:
- Biomedical Engineering
- Radiology
- Dental Imaging
Background:
- Three-dimensional (3D) surface models are increasingly used in dentistry and medicine.
- Evaluating the accuracy of measurements derived from these models is crucial for clinical applications.
- Standardized segmentation thresholds can influence the reliability of 3D model measurements.
Purpose of the Study:
- To assess the reliability and accuracy of linear measurements on 3D surface models generated by two software programs (Dolphin and InVesalius).
- To compare measurements from 3D models against physical measurements of dry mandibles.
- To determine the impact of different software filters on measurement accuracy.
Main Methods:
- Ten dry mandibles with embedded markers were scanned using i-CAT Classic imaging.
- Linear measurements were performed on 3D surface models generated by Dolphin Imaging (Translucent and Solid-1 filters) and InVesalius software.
- Physical measurements were conducted on the dry mandibles using a digital caliper by a separate observer.
Main Results:
- High intra- and inter-observer reliability (ICC and Pearson's r ≥ 0.91) was observed for all measurements.
- Linear measurements on 3D models showed good accuracy compared to physical measurements.
- Dolphin's Solid-1 filter yielded the most accurate results, followed by InVesalius, then Dolphin's Translucent filter.
Conclusions:
- Linear measurements on 3D surface models from Dolphin and InVesalius software are reliable and accurate when compared to direct physical measurements.
- The choice of software and filter settings can influence measurement accuracy.
- Further studies are needed to ensure error predictability for realistic diagnosis and treatment planning using 3D models.
