Summarize the radiology report findings into an impression within 3 sentences.
    INPUT: There has been interval removal of the chest drains . There is a small left pleural effusion . There is improved aeration of the left lung base . No pneumothorax seen . A right internal jugular catheter terminates in the mid SVC . Mild cardiomegaly with prominence of the bilateral hila consistent with a degree of congestive heart failure . Previous median sternotomy noted .
    OUTPUT:
    
No pneumothorax seen after chest drain removal .