Summarize the radiology report findings into an impression within 3 sentences.
    INPUT: Again , there is prominence of the pulmonary vasculature , likely due to mild congestion . There is no overt pulmonary edema . There is no pleural effusion or pneumothorax . Patchy left perihilar opacity appears chronic and probably due to minor scarring from prior surgery or infection . The cardiomediastinal silhouette is unchanged . The heart size is normal . The patient is status post an aortic valve replacement and probable coronary bypass surgery .
    OUTPUT:
    
Unchanged mild vascular congestion without overt pulmonary edema . Otherwise , no acute cardiopulmonary process .