Summarize the radiology report findings into an impression within 3 sentences.
    INPUT: The patient is status post median sternotomy and CABG . The heart size is moderately enlarged , unchanged . The mediastinal contour is stable with tortuosity of the thoracic aorta again noted . Prominent right upper paratracheal bulge is due to the presence of tortuous vessels and remains unchanged . Hilar contours remain enlarged compatible with pulmonary arterial hypertension . Lung volumes are low which causes crowding of the bronchovascular structures . Prominent bilateral interstitial markings and patchy opacities in the lung bases likely reflect an element of mild pulmonary edema , though infection or aspiration the lung bases can not be completely excluded . Minimal fluid is seen along the right major fissure . There is no pneumothorax .
    OUTPUT:
    
Probable mild pulmonary edema although aspiration or infection at the lung bases can not be completely excluded . Followup radiographs after diuresis are recommended for further assessment .