Summarize the radiology report findings into an impression within 3 sentences.
    INPUT: Mild to moderate cardiomegaly is present . The aorta is unfolded . Mediastinal and hilar contours otherwise are unremarkable . Minimal streaky bibasilar airspace opacities likely reflect atelectasis . No pulmonary edema is seen . No pleural effusion or pneumothorax is identified . No acute osseous abnormalities are present . There are mild degenerative changes in both acromioclavicular joints .
    OUTPUT:
    
Mild patchy bibasilar airspace opacities are likely reflective of atelectasis . Infection , however , is not completely excluded .