Kerley lines are named after Peter J. Kerley, a British radiologist, who identified types of septal lines on chest radiographs in patients with congestive heart failure.
| Type | Description |
|---|---|
| Kerley A lines | linear opacities usually 2 - 6 cm long radiating from the hila into the periphery, caused by distention of lymphatic channels between perivenous and peribronchovascular lymphatics |
| Kerley B lines |
| Stage | Description |
|---|---|
| I. | Perihilous streaky opacities, incipient interstitial edema |
| II. | Diffuse, more or less homogeneous opacities, event. batwing appearance |
| III. | Increased opacity of shadows due to edema of bronchial wall, event. bronchogram sign |
| IV. | Confluent shadows of increasing size |