Summarize the radiology report findings into an impression within 3 sentences.
    INPUT: A new pigtail catheter has been inserted into the left hemithorax with a substantial decrease in a left - sided pleural effusion although much of the left hemithorax remains opacified with pleural effusion and atelectasis involving much of the left lung . Rightward shift has somewhat reduced . A few small foci of air in the left hemithorax are not unanticipated after chest tube placement . On the right , there is a right basilar opacity worrisome for pneumonia , similar to increased , although not definitely changed allowing for substantial differences in technique . A small pleural effusion is difficult to exclude on the right . A Port - A - Cath terminates in the superior vena cava .
    OUTPUT:
    
Status post chest tube placement with decrease in left - sided pleural effusion and some improvement in aeration . Persistent right basilar opacity , similar to increased , worrisome for pneumonia .