Summarize the radiology report findings into an impression within 3 sentences.
    INPUT: Patient is status post median sternotomy , cardiac valve replacement , CABG . The cardiac silhouette remains enlarged . The aorta is calcified . Large - bore right - sided central venous catheter terminates in the right atrium . The lungs are clear without focal consolidation . No pleural effusion or pneumothorax is seen . There is minimal interstitial edema .
    OUTPUT:
    
Minimal interstitial edema .