Summarize the radiology report findings into an impression within 3 sentences.
    INPUT: A new air - fluid level within a moderate - sized anterior upper right hemithorax reflects upright positioning of this examination ; this collection appears is a right perihilar opacity on recent radiographs , and is roughly similar in size . A persistent loculated fluid collection near the right apex is minimally changed since the most recent ___ radiograph . The left lung remains clear . The heart size is unchanged . An intrathecal line and right IJ central venous catheter are unchanged in position . A subcutaneous surgical drain overlies the right hemithorax .
    OUTPUT:
    
Moderate sized loculated collection of gas and fluid within the right anterior hemithorax is more easily demonstrated on this dedicated upright view , and is similar in size in comparison to recent radiographs . A second loculated right apical collection is stable .