Summarize the radiology report findings into an impression within 3 sentences.
    INPUT: Heart size is mildly enlarged . The mediastinal and hilar contours are within limits . Pulmonary vasculature is not engorged . Patchy opacities in the lung bases may reflect areas of atelectasis . No pleural effusion or pneumothorax is present . There are no acute osseous abnormalities .
    OUTPUT:
    
Patchy opacities in the lung bases may reflect areas of atelectasis . Infection is not excluded in the correct clinical setting .