Summarize the radiology report findings into an impression within 3 sentences.
    INPUT: Decreased vascular congestion is accompanied by slightly decreased left mid lung and unchanged left lower lung opacities . Lungs remain very low in volume with small to moderate bilateral pleural effusions . Heart is poorly assessed but appears mild to moderately enlarged with calcified aortic arch .
    OUTPUT:
    
Decreased mild pulmonary vascular congestion with decrease in left mid lung and unchanged left lower lung opacities compatible with known pneumonia . Given the interval improvement , the left midlung opacity may reflect the result of an aspiration event .