Summarize the radiology report findings into an impression within 3 sentences.
    INPUT: The cardiac , mediastinal and hilar contours appear stable . There is no pleural effusion or pneumothorax . An interstitial abnormality has substantially improved , although there is still peribronchial cuffing which can be identified with a heterogeneous distribution , predominantly in the lower lungs , greater on the right than left , a fairly similar overall pattern to the prior study .
    OUTPUT:
    
Findings suggestive of airway inflammation , but no definite pneumonia .