Summarize the radiology report findings into an impression within 3 sentences.
    INPUT: There is increased bibasilar opacification compared to ___ concerning for pneumonia . No pleural effusion or pneumothorax is noted . Cardiomediastinal silhouette and tortuous aortic contour is unchanged . There is calcification of the descending aorta and possibly aortic valve calcification .
    OUTPUT:
    
Increased bibasilar opacification compared to ___ is concerning for pneumonia , which could be due to aspiration .