chest x-ray

Kerley lines - types

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

ARDS on chest X-ray: stages

Acquired respiratory distress syndrome on chest radiograph

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
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