Summarize the radiology report findings into an impression within 3 sentences.
    INPUT: There is interstitial thickening most prominent at the bases bilaterally . There is also patchy opacification of the right lower lobe . Cardiac enlargement stable . The aorta is calcified and tortuous . The hilar contours are normal . The pulmonary vasculature is normal . No pleural effusion or pneumothorax is seen .
    OUTPUT:
    
1 . Patchy opacification of the right lobe , which could represent developing pneumonia . 2 . Bibasilar interstitial thickening representing chronic interstitial disease . 3 . No evidence of congestive heart failure .