Summarize the radiology report findings into an impression within 3 sentences.
    INPUT: Heart size is normal . Mediastinal and hilar contours are unremarkable . There is no pulmonary vascular congestion . Patchy bibasilar airspace opacities are worse compared to the prior radiograph , but present when compared to the prior CT . At the time of the CT , this was likely felt to reflect acute on chronic bronchitis and bronchiolitis . Small left pleural effusion is noted . There is no pneumothorax . No acute osseous abnormalities are seen .
    OUTPUT:
    
Persistent bibasilar airspace opacities previously characterized on CT to reflect acute on chronic bronchitis and bronchiolitis . Findings have progressed compared to the prior radiograph from ___ . Small left pleural effusion .