Summarize the radiology report findings into an impression within 3 sentences.
    INPUT: Lung volumes are unchanged compared to the prior study . A right - sided Port - A - Cath terminates in the distal SVC or right atrium . A pigtail catheters seen at the left lung base . No pneumothorax , there is a small amount of surgical emphysema . Probable slight improvement in the small residual pleural effusion . A small left apical pneumothorax is unchanged compared to the prior study .
    OUTPUT:
    
No significant interval change when compared to the prior study .