Summarize the radiology report findings into an impression within 3 sentences.
    INPUT: The patient is status post coronary artery bypass graft surgery . A dialysis catheter terminates in the upper right atrium . The cardiac , mediastinal and hilar contours appear unchanged . There is very mild pulmonary congestion with interstitial changes at the lung bases and mild perihilar congestion but not highly striking and not nearly as severe as on prior presentation . On the prior chest CT discrete nodules were identified . These are not well assessed with this technique . Accordingly , if no other intervention is planned short - term follow - up CT should be considered .
    OUTPUT:
    
Findings suggesting mild vascular congestion . Nodules seen on prior CT not well assessed ; persistent nodules can not be excluded .