Summarize the radiology report findings into an impression within 3 sentences.
    INPUT: Frontal and lateral views of the chest demonstrate normal cardiomediastinal silhouette . The lungs are clear . There is no appreciable pneumothorax or pleural effusion . A nondisplaced sternal fracture can be seen without displacement or evidence for change since the initial study although this is not to say necessarily that it might not be healing . Detailed assessment for slight change could be better assessed with CT if needed clinically .
    OUTPUT:
    
1 . Sternal fracture without displacement or pneumothorax . 2 . No acute cardiopulmonary process .