Summarize the radiology report findings into an impression within 3 sentences.
    INPUT: Cardiac silhouette is enlarged . The aorta is tortuous . Bibasilar opacities may be due to atelectasis although underlying infection is not excluded . No pleural effusion or pneumothorax is seen . .
    OUTPUT:
    
Cardiomegaly . Bibasilar opacities may be due to atelectasis , however , underlying infection is not excluded in the appropriate clinical setting .