Left lower lobe atelectasis due to elevation of the diaphragm

Chest frontal radiograph (A) of compressive atelectasis of the left lower lobe due to marked elevation of the left hemidiaphragm (arrow). Axial (B) and coronal (C, D) computed tomographic (CT) scan in the same patient displays the compressive atelectasis of the left lower lobe in the basal segments (dashed arrows).