Summarize the radiology report findings into an impression within 3 sentences.
    INPUT: One portable AP upright view of the chest . No pneumothorax is seen . Subcutaneous air is unchanged . The left lower lobe opacity is unchanged . Right lung is clear . The cardiac , mediastinal , and hilar contours are normal . The most superior portions of the apices are slightly obscured by patient 's chin .
    OUTPUT:
    
1 . No interval pneumothorax seen ; however , the most superior portion of the apices are slightly blurred by the patient 's chin . 2 . Left lower lobe opacity and subcutaneous are are unchanged .