Summarize the radiology report findings into an impression within 3 sentences.
    INPUT: Single supine frontal view of the chest was obtained . Bilateral pleural effusions are difficult to directly compare to the prior exam due to difference in patient position . Allowing for this limitation , right pleural effusion appears similar to prior , still large , and left pleural effusion appears decreased status post thoracentesis , now small . No pneumothorax . Heart size appears stable . Mediastinal contours are stable . Catheter of a right chest wall port terminates in the right atrium .
    OUTPUT:
    
Left pleural effusion has decreased after interval thoracentesis , now small . Right pleural effusion remains large . No pneumothorax .