Summarize the radiology report findings into an impression within 3 sentences.
    INPUT: A right Port - A - Cath is in unchanged position . When compared to prior radiograph dated ___ , there is improved aeration of the left lung base with resolution of pleural effusion . There is additional improved aeration of the right lung base with near complete resolution of right pleural effusion . The cardiomedistainl silouetter is stable . There is no pneumothorax . Visualized osseous structures are unremarkable . Surgical clips are noted projecting over the right upper quadrant . Left atrial appendage ligation clip is incidentally noted .
    OUTPUT:
    
Improved aeration of bilateral lung bases with small right persistent pleural effusion . Right port - a-cath in appropriate and unchanged position .