Summarize the radiology report findings into an impression within 3 sentences.
    INPUT: Since the prior radiograph from ___ , there is development of thickened airways in the left upper , left lower , and right lower lungs , which are not accompanied by discrete areas of consolidation . Instead , there is increased interstitial opacification in these areas . There is no pleural effusion or pneumothorax . Heart size and mediastinal contours are normal .
    OUTPUT:
    
Findings are compatible with a diffuse bronchitis / small airways disease .