Summarize the radiology report findings into an impression within 3 sentences.
    INPUT: Again seen is marked interstitial opacity particularly notable at the left lung base consistent with patient 's known pulmonary fibrosis and bronchiectasis seen on the CT 's from ___ and ___ . There is evidence of right basilar atelectasis . In the context of the limitations of the parenchyma , no definite superimposed new focal opacity is seen . There is a small right pleural effusion , no pneumothorax . The left heart border is obscured by the fibrosis . The hilar and mediastinal contours are unchanged from prior exams dating back to ___ .
    OUTPUT:
    
No acute interval changes suggestive of pneumonia identified .