Summarize the radiology report findings into an impression within 3 sentences.
    INPUT: The lungs are well - expanded and clear . No pleural abnormalities are seen . The cardiac and mediastinal silhouettes are unremarkable . Rounded metallic object is external to the patient . No pneumonia , pleural effusion or pulmonary edema is seen .
    OUTPUT:
    
No pneumonia , pleural effusion or pulmonary edema .