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The 28-zone lung ultrasound scanning scheme. The chest is divided along the parasternal, midclavicular, anterior axillary and mid-axillary lines, from the second to the fifth intercostal space on the right hemithorax and from the second to the fourth intercostal space on the left hemithorax, for a total of 16 scanning zones on the right and 12 scanning zones on the left.
