Summarize the radiology report findings into an impression within 3 sentences.
    INPUT: Single frontal view of the chest was obtained . The heart is of normal size with normal cardiac and mediastinal contours . The pulmonary vessels are unremarkable . The lungs are clear without focal or diffuse abnormality . No pleural effusion or pneumothorax is present . A small metallic density overlies the right humeral head . The osseous structures are unremarkable .
    OUTPUT:
    
No acute cardiopulmonary process .