Summarize the radiology report findings into an impression within 3 sentences.
    INPUT: The patient is status post median sternotomy and CABG . Mild to moderate enlargement of cardiac silhouette is unchanged . The aortic knob remains calcified . There is worsening pulmonary edema which is now mild in extent . A moderate to large right pleural effusion appears relatively unchanged compared to the prior exam . There is continued right basilar opacification which may reflect compressive atelectasis though underlying infection can not be excluded . No pneumothorax is identified , and a left - sided pleural effusion is not noted .
    OUTPUT:
    
Worsening mild pulmonary edema . Persistent moderate to large right pleural effusion with associated right basilar opacification likely reflecting compressive atelectasis though infection can not be completely excluded .