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Table 114.5

Appearances of A- and B-Lines on Thoracic Scan

A-lines (Figure 114.1 (left))B-lines (Figure 114.1 (right))
AppearanceNormal horizontal reverberation artefact, parallel to the pleural linePathological vertical reverberation artefact, arising from the pleural line
Interpretation

Normal lung

Asthma

COPD

Fluid-thickened interstitium: pulmonary oedema; or

Collagen-thickened interstitium: pulmonary fibrosis