Summarize the radiology report findings into an impression within 3 sentences.
    INPUT: The heart is at the upper limits of normal size . The mediastinal contours appear unchanged . Perihilar fullness with a predominantly central to lower lung interstitial abnormality is fairly similar , most consistent with mild - to - moderate pulmonary vascular congestion , somewhat worse than on the prior examination but similar in pattern . There is no definite pleural effusion .
    OUTPUT:
    
Findings suggesting moderate pulmonary vascular congestion .