Summarize the radiology report findings into an impression within 3 sentences.
    INPUT: Single frontal view of the chest demonstrates no evidence of pneumothorax . The cardiomediastinal silhouette is unremarkable . There is no vascular congestion or pleural effusion . No displaced osseous injury is evident . A 6 - mm well - circumscribed radiodensity projecting over the right humeral head may represent a bone island , but is not encompassed on preceding radiographs of the chest .
    OUTPUT:
    
No acute cardiopulmonary process such as pneumothorax .