Evaluation of the human airway using cone-beam computerized tomography

Area of Science:

• Radiographic imaging
• 3-dimensional reconstruction
• Human airway anatomy

Background:

• Accurate measurement of human airway dimensions is crucial for understanding respiratory function.
• Cone-beam computerized tomography (CBCT) offers a low-radiation method for detailed anatomical imaging.

Purpose of the Study:

• To define and quantify human airway space using volumetric 3D imaging.
• To digitally reconstruct the pharynx and identify regions of airway constriction.

Main Methods:

• A randomized retrospective study design.
• Selection of 10 patient scans from 196 subjects undergoing dental treatment.
• Acquisition of Digital Imaging and Communications in Medicine (DICOM) volume images using a low-radiation CBCT system.

Main Results:

• Analysis of cross-sectional area histograms revealed maximum airway constriction in 8 out of 10 subjects.
• The primary region of constriction was identified near the oropharynx.
• The most restricted cross-sectional area ranged from 90 mm² to 360 mm².

Conclusions:

• CBCT imaging effectively defined human airway space and identified pharyngeal constriction.
• Significant variation exists in the level and extent of airway constriction within the pharynx.
• Findings highlight the importance of individual airway morphology in respiratory studies.