Summarize the radiology report findings into an impression within 3 sentences.
    INPUT: An accessed right pectoral MediPort extends into the upper right atrium . A left basilar drainage catheter is unchanged in position . The right pleural effusion has substantially decreased post thoracentesis . Bandlike opacities at the right lung base are likely due to atelectasis . The small left pleural effusion is not appreciably changed . However , retrocardiac opacification of the left lung base has increased . Mild pulmonary edema has also slightly increased . There is no pneumothorax . Mild cardiomegaly is unchanged .
    OUTPUT:
    
Substantial interval decrease and right pleural effusion post thoracotomy . No pneumothorax . Increased retrocardiac opacification may be due to aspiration or atelectasis . Right basilar subsegmental atelectasis . Stable small left pleural effusion with drainage catheter in place . Slightly increased mild pulmonary edema .