Summarize the radiology report findings into an impression within 3 sentences.
    INPUT: Portable AP semi-upright view of the chest was reviewed and compared to the prior studies . The tracheostomy tube ends 6 cm above the carina . An upper enteric tube terminates off the edge of the radiograph . Right upper lobe expansion has minimally improved ; however , complete collapse of the right middle lobe and right lower lobe is unchanged . A large left pleural effusion is also unchanged and obscures evaluation of the cardiac borders . Widening of the mediastinum , which is unchanged , indicates volume overload .
    OUTPUT:
    
1 . Complete right middle and right lower lobe collapse is unchanged . 2 . Right upper lobe aeration has minimally improved . 3 . Mediastinal widening , which is unchanged , indicates volume overload . 4 . Large left pleural effusion is unchanged .