Summarize the radiology report findings into an impression within 3 sentences.
    INPUT: Portable semi-erect chest radiograph ___ at 19 :49 is submitted .
    OUTPUT:
    
Interval increase in size of large layering right pleural collection consistent with hemothorax given history of bloody pleural fluid coming from the chest tube . Right chest tube remains unchanged in position . There is now slight shift to the mediastinal and cardiac structures to the left . There is improved aeration at the left base with interval appearance of patchy opacity in the left mid lung which may reflect an area of atelectasis , although pneumonia can not be excluded . No pneumothorax . Heart remains enlarged .