Summarize the radiology report findings into an impression within 3 sentences.
    INPUT: Frontal and lateral radiographs of the chest demonstrate unchanged right chest wall port with the catheter in the low SVC . Compared to the prior study , there has been slight increase in lung volumes with mild improvement in right pleural effusion and continued small right pleural effusion . No left pleural effusion . Cardiac size is top normal . No pneumonia . No pneumothorax .
    OUTPUT:
    
Slight interval improvement in right pleural effusion with continued small right pleural effusion .