Summarize the radiology report findings into an impression within 3 sentences.
    INPUT: The cardiomediastinal silhouette is unremarkable . The lungs are hyperexpanded and note is made of a prominent bulla in the right apex . Left hemidiaphragm is mildly elevated . . There is no pneumothorax . Osseous structures are unremarkable .
    OUTPUT:
    
No acute cardiopulmonary abnormality . No evidence of acute , displaced rib fracture or pneumothorax