Summarize the radiology report findings into an impression within 3 sentences.
    INPUT: Heart size is mildly increased compared to previous radiograph . Evidence of previous CABG . Spinal stabilization rods in situ . Mild prominence of the pulmonary vessels are unchanged . No overt pulmonary edema . No new airspace opacification . No new or enlarging effusion . Elevation of right hemidiaphragm unchanged . No pneumothorax .
    OUTPUT:
    
No significant interval change compared to ___ . Pulmonary vascular congestion , but no overt pulmonary edema .