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Updated: May 22, 2026
08:25
Combining Volumetric Capnography And Barometric Plethysmography To Measure The Lung Structure-function Relationship
Published on: January 8, 2019
Is the airway volume being correctly analyzed?
Matheus Alves1, Carolina Baratieri, Cláudia Trindade Mattos
1Department of Orthodontics, Faculty of Dentistry, Federal University of Rio de Janeiro, Brazil.
Summary
Determining the optimal threshold value for airway volume quantification is crucial. Threshold values of 70-75 in Dolphin 3D software accurately measure airway volume using cone-beam computed tomography.
Area of Science:
- Medical Imaging
- Radiology
- Anatomy
Background:
- Accurate airway volume quantification is essential for clinical diagnosis and treatment planning.
- Cone-beam computed tomography (CBCT) is a common imaging modality for airway assessment.
Purpose of the Study:
- To identify the most accurate threshold value for airway volume quantification using CBCT.
- To compare different threshold values in Dolphin 3D software against a gold standard.
Main Methods:
- Ten airway prototype scans were acquired using CBCT.
- Airway volumes were measured using Dolphin 3D software with threshold values ranging from 25 to 75.
- Statistical analysis, including intraclass correlation coefficient and ANOVA with Tukey's post-hoc test, was employed.
Main Results:
- High intraexaminer reliability (ICC ≥0.99) and comparability of CBCT scans (ICC ≥0.98) were confirmed.
- Threshold values of 25 and 50 showed statistically significant differences from the gold standard.
- Threshold values of 70, 71, 72, 73, 74, and 75 demonstrated no significant differences from the gold standard.
Conclusions:
- Threshold value 73 in Dolphin 3D software is the most accurate for airway volume measurement with the specific CBCT machine and parameters used.
- Threshold values 70, 71, 72, 74, and 75 are also reliable for airway volume quantification as they show no significant difference from the gold standard.
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