Assessing the structure of the canine bronchial tree

Anatomic study of the canine bronchial tree using silicone casts, radiography, and CT

Peter V. Scrivani, Aaron Percival

The article aims to examine the shape, size, and pattern of the bronchial tree in dogs using different imaging methods. The authors used silicone casts to create three-dimensional models of the lungs of two dogs, and then visualized them by radiography and CT. They found that the bronchial tree had a hierarchical branching structure that reflected the lobar, segmental, and pulmonary lobular organization of the lungs. They also observed that the bronchial lumens produced large-diameter, branching, tapering bands that radiated from the lung hilus, while the bronchiole lumens produced small-diameter, branching, tapering, nonradiating lines that created a speckled pattern. They also noted that some bronchial lumens had small-diameter rings with air-filled lumens due to positive and negative summation shadows. The authors concluded that the imaging patterns in dogs might be affected by the pulmonary lobular morphology and might differentiate large and small airway diseases.

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