Summarize the radiology report findings into an impression within 3 sentences.
    INPUT: Severe cardiomegaly is present . Mediastinal and hilar contours are unremarkable . There is no pulmonary edema . Patchy opacities in lung bases may reflect atelectasis . No pleural effusion or pneumothorax is demonstrated . There are no acute osseous abnormalities .
    OUTPUT:
    
Severe cardiomegaly with mild bibasilar atelectasis .