Summarize the radiology report findings into an impression within 3 sentences.
    INPUT: There has been interval improved aeration in the left upper lung , consistent with resolution of post biopsy changes . Left upper lobe mass is seen , better evaluated on recent prior CT . Small left pleural effusion persists . No pneumothorax is seen . Dilation of the descending aorta is better evaluated on recent CT .
    OUTPUT:
    
Interval resolution of left upper lung post biopsy changes with persistent small left pleural effusion and left upper lobe mass .