Summarize the radiology report findings into an impression within 3 sentences.
    INPUT: The heart is at the upper limits of normal size . The lung volumes are low . The mediastinal and hilar contours appear unchanged . There is again mild upper zone redistribution of the pulmonary vascularity . The lungs appear clear . There are no pleural effusions or pneumothorax . Surgical clips project over the right upper quadrant .
    OUTPUT:
    
Slight evidence for pulmonary venous hypertension without overt congestion heart failure .