Summarize the radiology report findings into an impression within 3 sentences.
    INPUT: The heart size is normal . The hilar and mediastinal contours are within normal limits . Relative upper zone lucency may reflect chronic obstructive lung disease or emphysema also noting a suggestion of irregular lung architecture . A fine bilateral retricular abnormality is present in both lower lungs . There is no evidence for focal consolidation , pneumothorax , or pleural effusion .
    OUTPUT:
    
Hazy bibasilar opacities with fissural thickening , possibly representing mild interstitial edema with an atypical distribution , which could be seen in the background of abnormal lung architecture , noting a short - term increase in interstitial opacification . Worsening primary interstitial lung disease could also be considered .