Summarize the radiology report findings into an impression within 3 sentences.
    INPUT: There are patchy opacities at bilateral lower lobes , increased from ___ , concerning for progression of pneumonia . Left upper lung zone is relatively spared . There is pulmonary vascular congestion . Cardiac silhouette is increased compared to prior , but within normal size limits . Pleural effusion is small , if any . There is no pneumothorax .
    OUTPUT:
    
There are patchy opacities at bilateral lower lobes , increased from ___ , concerning for progression of pneumonia . There is mild pulmonary vascular congestion .