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Normal bronchial and pulmonary arterial diameters measured by thin section CT
1Department of Radiology, College of Medicine Chungbuk National University, South Korea.
Journal of Computer Assisted Tomography
|May 1, 1995
Summary
The artery-bronchus ratio (ABR) and bronchial lumen ratio (BLR) show wide normal value ranges. These ratios may have limited use for evaluating diseases of the bronchovascular tree.
Area of Science:
- Radiology
- Pulmonary Medicine
- Medical Imaging
Background:
- The artery-bronchus ratio (ABR) and bronchial lumen ratio (BLR) are potential metrics for assessing bronchovascular health.
- Establishing normal values at subsegmental levels is crucial for their clinical application.
Purpose of the Study:
- To determine normal values for ABR and BLR at subsegmental levels.
- To assess the utility of ABR and BLR as objective parameters for diagnosing diseases affecting the bronchovascular tree.
Main Methods:
- High-resolution CT scans from 30 healthy individuals were analyzed.
- ABR (pulmonary artery outer diameter/bronchus outer diameter) and BLR (bronchus inner diameter/outer diameter) were measured at subsegmental levels.
Main Results:
- Mean ABR was 0.98 ± 0.14 (range, 0.53-1.39).
- Mean BLR was 0.66 ± 0.06 (range, 0.51-0.86).
- Statistically significant differences were observed in ABR between segments and lobes, but not in BLR.
Conclusions:
- Normal ABR and BLR values exhibit a wide range.
- The broad variability of these ratios may limit their effectiveness in evaluating bronchovascular abnormalities.