Summarize the radiology report findings into an impression within 3 sentences.
    INPUT: PA and lateral images of the chest demonstrate well expanded lungs . There is an area of gas above the right lung again seen which is similar to previous imaging . There is subcutaneous air noted on the right side of the body and intramuscular free air within the pectoralis muscles on the right . There is interval improvement of the opacity in the upper portion of the right lung . The right lower lobe appears unchanged . The left lung remains clear . Cardiomediastinal silhouette appears unchanged .
    OUTPUT:
    
Unchanged right - sided pneumothorax , significant subcutaneous and intramuscular air , improvement in right upper lung opacity .