Summarize the radiology report findings into an impression within 3 sentences.
    INPUT: Stable , bilateral hilar prominence . Interval improvement in pulmonary vascular congestion . Mild elevation of the left hemidiaphragm and obscuration of the left heart border suggest possible volume loss in the left hemithorax . Normal heart size . No pneumothorax or acute focal pneumonia .
    OUTPUT:
    
Interval improvement in pulmonary vascular congestion . Possible mild volume loss in the left hemithorax .