Fig. 1.

Scanning sectors (as used at the author’s centre). Zones on the right hemithorax. a R1 right anterior upper zone, R2 right anterior lower zone, Rs right supraclavicular fossa b R3 right lateral axilla zone, R4 right lateral lower zone c R5 right posterior upper zone R6 right posterior lower zone. I, II, III, IV first, second, third, fourth ribs, respectively, H horizontal fissure, O oblique fissure, C costophrenic recess, lowest limit of LUS study where curtain sign is found, *inferior angle of scapula