Summarize the radiology report findings into an impression within 3 sentences.
    INPUT: The patient is status post coronary artery bypass graft surgery . There is also a replaced aortic valve . The heart is mild to moderately enlarged . Unfolding of the thoracic aorta is similar . The cardiac , mediastinal and hilar contours appear unchanged . A diffuse moderate interstitial abnormality suggests pulmonary vascular congestion . There is no pleural effusion or pneumothorax although the right minor fissure is slightly thickened .
    OUTPUT:
    
Findings suggesting moderate pulmonary vascular congestion .