Summarize the radiology report findings into an impression within 3 sentences.
    INPUT: PA and lateral views of the chest provided . Patient is status post median sternotomy . In comparison to the prior chest radiograph from the same date , there is interval placement of a right pleural catheter . Right pleural effusion appears similar in extent . There is persistent right lung base atelectasis . The left costophrenic angle is not able included in the study .
    OUTPUT:
    
1 . Interval placement of a right pleural catheter . Right pleural effusion appears similar in extent . 2 . No pneumothorax .