Pleural sliding and lung expansion at the lung-chest wall interface in the intercostal lung ultrasonography image. The pleurae appear as hyperechoic linear structures. Backward and forward horizontal sliding movement of the pleurae is indicated for visceral pleural movement against the parietal pleura, which is synchronized with manual ventilation. Two isolated B-lines arising from the juxta-pleural consolidation are projected vertically and thought to result from anesthesia-induced atelectasis. Statistical analyses were conducted using the SPSS software version 25.0 (IBM Inc., Armonk, NY, USA) ( 