Summarize the radiology report findings into an impression within 3 sentences.
    INPUT: In comparison to the most recent prior study , there is improved aeration at the left lung base with mild blunting at the left costophrenic angle compatible with decreased size of small left pleural effusion from ___ . There is elevation of the right hemithorax compared to the left . A small - to - moderate right pleural effusion is unchanged . Opacity at the right paratracheal stripe and lung apex is unchanged , compatible with radiation changes of non-small cell lung cancer . No pneumothorax is present . The pulmonary vasculature is not engorged and there is no overt pulmonary edema . The cardiac silhouette is moderately enlarged but stable . There is diffuse calcification and tortuosity of the thoracic aorta with a graft stent in the descending thoracic aorta , as before . The mediastinal contours are unchanged .
    OUTPUT:
    
1 . Improved aeration of the left lung base with decreased size of small left pleural effusion and improving atelectasis . 2 . Persistent small - to - moderate right pleural effusion . 3 . Unchanged post-radiation changes of the right paratracheal lung .