Summarize the radiology report findings into an impression within 3 sentences.
    INPUT: Lung volumes are somewhat low . There is mild cardiomegaly with unfolding of the thoracic aorta . There are mild calcifications in the aortic knob . Hilar contours are unremarkable . There are streaky bibasilar opacities . There is no pleural effusion or pneumothorax . Note is made of a cholecystectomy clip in the right upper quadrant .
    OUTPUT:
    
Streaky bibasilar opacities which likely represent atelectasis though infection is not excluded .