Summarize the radiology report findings into an impression within 3 sentences.
    INPUT: As compared to previous radiograph from a few hours earlier , the right middle and right lower lobes have substantially improved aeration and a right apical hydro pneumothorax has decreased in size with indwelling chest tube remaining in place . The previously described right middle lobe nodule is no longer seen representing superimposition .
    OUTPUT:
    
As compared to previous radiograph from a few hours earlier , the right middle and right lower lobes have substantially improved aeration and a right apical hydropneumothorax has decreased in size