curtain sign on ultrasound

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There is a small pleural effusion just above the diaphragm and a consolidation in the patient's lung parenchyma, with pockets of hyperechoic trapped air (Figure 1). As the patient inspires, there is movement of the aerated (with scattered B lines) upper lobe down toward the lower lobe, and this finding has been called a curtain sign. When the upper lobe moves downward, it obscures the consolidated lower lobe.