Summarize the radiology report findings into an impression within 3 sentences.
    INPUT: The heart is mildly enlarged . There are streaky opacities in the bilateral bases , likely reflecting atelectasis . The mediastinal contours are normal , with note made of calcification of the aortic knob . The pulmonary vasculature is normal . Clips are noted in the left apex .
    OUTPUT:
    
Bibasilar atelectasis and mild cardiomegaly , unchanged .