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Ultrasound B-mode harmonics effect on B-lines. A) Acute exacerbation of interstitial lung disease, fibrotic part, faint B-lines (white arrowheads). B) Acute exacerbation of interstitial lung disease, ground glass part. Note how short are either confluent (asterisk) or more prominent (white arrowheads) B-lines. C) Pleural thickening with associated consolidation (hash) in the apex. Note faint confluent sub-B lines (asterisk)
