Summarize the radiology report findings into an impression within 3 sentences.
    INPUT: There is substantial subcutaneous emphysema involving the lateral and posterior portions of the chest with a minimal amount tracking anteriorly . There are post-traumatic changes that are not well characterized involving right - sided ribs as well as a prior fracture of the right clavicle . The right hemidiaphragm is moderate to severely elevated . The lateral view shows that there is substantial opacification of the right lower lobe with volume loss suggesting collapse or extensive atelectasis and probably a persistent pleural effusion . The left lung is clear without evidence for pleural effusion . Despite the presence of subcutaneous air , there is no definitive evidence for pneumothorax , although two small locules of gas projecting over the right upper lung field may potentially be intrapleural or project from elsewhere in overlying soft tissues .
    OUTPUT:
    
Subcutaneous emphysema . Widespread opacification of the right lower lobe with volume loss suggesting collapse or substantial atelectasis with a suspected pleural effusion . Suspected post-traumatic changes among right ribs and right clavicle .