Summarize the radiology report findings into an impression within 3 sentences.
    INPUT: In comparison to the prior study , there is interval placement of a pigtail pleural catheter a projects over the right mid chest . Right apical pleural effusion has decreased in size but remains visible . Cardiomediastinal silhouette is stable . There is no focal consolidation or pleural effusion .
    OUTPUT:
    
Decreased size of right apical pneumothorax , status post chest tube placement