Summarize the radiology report findings into an impression within 3 sentences.
    INPUT: PA and lateral views of the chest were obtained . A right chest wall Port - A - Cath is seen with catheter tip extending into the region of the right atrium . In comparison with the prior radiograph of the chest , there is persistent retrocardiac density , though there is slight improvement in overall aeration of the left lower lung compared with prior exam . Slight prominence of the right pulmonary hilum with perihilar linear markings suggesting retraction and scarring is again noted . No pleural effusion on the right . There may be a small left effusion . No pneumothorax . Interval resolution of pneumoperitoneum .
    OUTPUT:
    
Improved aeration at the left lung base with persistent opacity likely representing atelectasis , possibly with small effusion . Stable appearance of right hilar prominence with perihilar scarring / retraction .