Related Experiment Videos
Imaging of the small airways
1Department of Radiology, University Hospitals, Leuven, Belgium. johny.verschakelen@uz.kuleuven.ac.be
Seminars in Respiratory and Critical Care Medicine
|August 10, 2005
Summary
Diagnosing small airways disease (SAD) is challenging. High-resolution computed tomography (HRCT) offers direct and indirect signs to help detect and characterize SAD, aiding in the review of various small airways diseases.
Area of Science:
- Pulmonary Medicine
- Radiology
- Pathology
Background:
- Small airways disease (SAD) involves pathologic changes in small conducting airways, often difficult to diagnose due to lack of clear clinical or imaging correlates.
- Widespread involvement is typically required for SAD to manifest clinically or on pulmonary function testing, complicating early detection.
Purpose of the Study:
- To discuss direct and indirect signs of small airways involvement detectable by high-resolution computed tomography (HRCT).
- To review HRCT features of key diseases affecting small airways based on distinct imaging signs.
Main Methods:
- Review of direct HRCT signs, including visible bronchiolar inflammation and exudates.
- Review of indirect HRCT signs, such as regional underventilation and reduced perfusion due to airway obstruction.
- Correlation of HRCT findings with histopathologic subtypes and clinical presentations of small airways diseases.
Main Results:
- HRCT can directly visualize inflammation and exudates in small airways.
- HRCT can indirectly detect small airways obstruction through secondary effects like underventilation and perfusion deficits.
- Distinct HRCT patterns are associated with different small airways diseases.
Conclusions:
- HRCT is a valuable tool for detecting, characterizing, and quantifying small airways involvement.
- Understanding the direct and indirect HRCT signs is crucial for diagnosing and differentiating various small airways diseases.