Summarize the radiology report findings into an impression within 3 sentences.
    INPUT: Heart size is mildly enlarged . The aorta is tortuous and diffusely calcified . Hilar contours are unremarkable . There is mild pulmonary vascular congestion but no overt pulmonary edema . No pleural effusion or pneumothorax is seen . Mild bibasilar opacities could reflect atelectasis . No acute osseous abnormalities are visualized .
    OUTPUT:
    
Mild pulmonary vascular congestion and probable mild bibasilar atelectasis .