Summarize the radiology report findings into an impression within 3 sentences.
    INPUT: AP single view of the chest has been obtained with patient in semi-upright position . Analysis is performed in direct comparison with the next preceding similar study obtained seven and a half hours earlier during the same day . Status post sternotomy , tracheal intubation and right - sided internal jugular approach central venous line unchanged . Cardiac enlargement unaltered . The on previous examination existing basal haze on the right side has decreased and a local basal air - fluid level is now identified indicating successful thoracocentesis diminishing right - sided pleural effusion which was partially layered in posterior pleural compartments in this patient in almost supine position . Left hemithorax remains unaltered . There is no evidence of any pneumothorax in the apical area . Position of NG tube unchanged .
    OUTPUT:
    
Successful right - sided thoracocentesis , no pneumothorax .