Summarize the radiology report findings into an impression within 3 sentences.
    INPUT: The patient is status post right sided chest tube insertion . The chest tube is difficult to visualize but is grossly unchanged in position , the tip appears to be close to the mediastinum . There is a persistent right basal pneumothorax , similar in extent when compared to the prior study . There is a small right - sided pleural effusion . Increased airspace opacity in the right mid lung likely reflects atelectasis but superimposed infection can not be excluded . Previous median sternotomy noted , surgical clips consistent with coronary artery bypass graft surgery . The left lung is grossly clear .
    OUTPUT:
    
No significant interval change when compared to the prior study .