Summarize the radiology report findings into an impression within 3 sentences.
    INPUT: Mild to moderate enlargement of the cardiac silhouette persists . The aorta remains tortuous with dilatation of the ascending aorta better assessed on the previous CT . Mediastinal and hilar contours are otherwise unchanged . Pulmonary vasculature is not engorged . Patchy bibasilar airspace opacities most likely reflect areas of atelectasis . No pleural effusion or pneumothorax is present . Mild scarring is noted in the lung apices . There are no acute osseous abnormalities .
    OUTPUT:
    
Mild bibasilar atelectasis . No focal consolidation to suggest pneumonia .