Comparison of automatic and visual methods used for image segmentation in Endodontics: a microCT study
AUTOR(ES)
Queiroz, Polyane Mazucatto, Rovaris, Karla, Santaella, Gustavo Machado, Haiter-Neto, Francisco, Freitas, Deborah Queiroz
FONTE
J. Appl. Oral Sci.
DATA DE PUBLICAÇÃO
2017-12
RESUMO
Abstract To calculate root canal volume and surface area in microCT images, an image segmentation by selecting threshold values is required, which can be determined by visual or automatic methods. Visual determination is influenced by the operator's visual acuity, while the automatic method is done entirely by computer algorithms. Objective: To compare between visual and automatic segmentation, and to determine the influence of the operator's visual acuity on the reproducibility of root canal volume and area measurements. Material and methods: Images from 31 extracted human anterior teeth were scanned with a μCT scanner. Three experienced examiners performed visual image segmentation, and threshold values were recorded. Automatic segmentation was done using the “Automatic Threshold Tool” available in the dedicated software provided by the scanner's manufacturer. Volume and area measurements were performed using the threshold values determined both visually and automatically. Results: The paired Student's t-test showed no significant difference between visual and automatic segmentation methods regarding root canal volume measurements (p=0.93) and root canal surface (p=0.79). Conclusion: Although visual and automatic segmentation methods can be used to determine the threshold and calculate root canal volume and surface, the automatic method may be the most suitable for ensuring the reproducibility of threshold determination.
Documentos Relacionados
- Segmentation Methods for Micro CT Images: A Comparative Study Using Human Bone Samples
- Accuracy of visual and image-based ICDAS criteria compared with a micro-CT gold standard for caries detection on occlusal surfaces
- Effect of Reciprocating Systems and Working Lengths on Apical Microcrack Development: a micro-CT Study
- Orthodontics and Endodontics: clinical decision-making
- Assessment of Ramifications in the Apical Region of Root Canals: A Micro-CT Study in a Brazilian Population