Appearances of A- and B-Lines on Thoracic Scan
A-lines (Figure 114.1 (left)) | B-lines (Figure 114.1 (right)) | |
---|---|---|
Appearance | Normal horizontal reverberation artefact, parallel to the pleural line | Pathological vertical reverberation artefact, arising from the pleural line |
Interpretation | Normal lung COPD | Fluid-thickened interstitium: pulmonary oedema; or Collagen-thickened interstitium: pulmonary fibrosis |