Summarize the radiology report findings into an impression within 3 sentences.
    INPUT: Again seen is a large air - gas collection within the anterior right chest , minimally changed since the ___ radiographs . A right IJ catheter is unchanged in position . There are slightly increased background pulmonary opacities , reflecting increased mild pulmonary edema .
    OUTPUT:
    
1 . Large right anterior gas - fluid collection appears stable since the ___ examinations . 2 . Slightly worsened mild pulmonary edema .