Summarize the radiology report findings into an impression within 3 sentences.
    INPUT: The cardiac silhouette size is normal . The mediastinal and hilar contours are unremarkable . The lungs are clear and the pulmonary vascularity is normal . No pleural effusion or pneumothorax is present . Diffuse demineralization of the osseous structures is noted , which limits the detection for subtle fractures . No grossly displaced rib fractures are present , and no other acute osseous abnormalities are visualized .
    OUTPUT:
    
No acute cardiopulmonary abnormality . Diffuse osteopenia limits evaluation for subtle fractures , but no acutely displaced fracture is visualized .