Summarize the radiology report findings into an impression within 3 sentences.
    INPUT: Severe interstitial fibrosis with basilar predominance , accompanied by marked right middle and bilateral lower lobe volume loss . Coexisting emphysema in the upper lobes is suspected . Heart size is mildly enlarged . There is enlargement of the main pulmonary trunk compatible with central pulmonary hypertension . Streaky retrocardiac opacity , likely represents atelectasis although infectious pneumonia is difficult to exclude . No focal lung consolidation seen . There is no overt pulmonary edema .
    OUTPUT:
    
Severe basilar predominant interstitial fibrosis , highly concerning for idiopathic pulmonary fibrosis and limiting evaluation for a superimposed acute process particularly at the bases . Chest CT is recommended for more complete characterization .