Summarize the radiology report findings into an impression within 3 sentences.
    INPUT: The patient is status post median sternotomy and CABG . The heart size remains mildly enlarged . The mediastinal and hilar contours are unchanged . There is mild pulmonary edema , slightly worse in the interval , though the lung volumes are lower compared to the previous exam . Persistent triangular area of opacification within the lateral aspect of the right mid lung field as well as bibasilar airspace opacities are demonstrated . Small bilateral pleural effusions are present , not changed from the previous exam . No pneumothorax is identified although assessment of the lung apices is obscured by the patient 's chin and soft tissues of the neck projecting over this region . A pigtail catheter is demonstrated which terminates in the region of the right lung base , unchanged .
    OUTPUT:
    
Mild pulmonary edema , worse in the interval . Persistent small bilateral pleural effusions with right basilar pigtail catheter in unchanged position . Persistent bilateral airspace opacities are similar .