Summarize the radiology report findings into an impression within 3 sentences.
    INPUT: Aeration of the right lung base is slightly improved , though opacification persists . There is blunting of the left costophrenic angle suggestive of persistent small left pleural effusion . Linear opacities within the left mid lung appear unchanged , corresponding with an area of scarring . There is unchanged mild pulmonary edema . Mediastinal and hilar contours are within normal limits . Mild cardiomegaly is unchanged . A left Port - A - Cath terminates in the low SVC , unchanged from prior .
    OUTPUT:
    
1 . Persistent bibasilar opacities , though with slight improved aeration of the right lung base . 2 . Unchanged mild pulmonary edema .