Summarize the radiology report findings into an impression within 3 sentences.
    INPUT: The lung volumes are low . Mild pulmonary vascular congestion with widening of right upper mediastinal vessels , no overt pulmonary edema . Small left pleural effusion . Moderate cardiomegaly . No pneumothorax .
    OUTPUT:
    
Mild pulmonary vascular congestion and small left effusion .