Summarize the radiology report findings into an impression within 3 sentences.
    INPUT: There is still extensive but slightly reduced subcutaneous emphysema seen globally . Mediastinal emphysema may be slightly worse than prior study . No pneumothorax is identified , however , given the subcutaneous emphysema , it is difficult to completely assess . Lungs are well inflated with no obvious areas of focal consolidation . There is no pleural effusion . The aorta is slightly tortuous and mildly calcified . Cardiac silhouette is within normal limits . The pleural surfaces are unremarkable .
    OUTPUT:
    
Slight interval decrease in subcutaneous emphysema . Possible slight increase in mediastinal emphysema . No pneumothorax is identified , however , study is limited by extensive subcutaneous emphysema .