Summarize the radiology report findings into an impression within 3 sentences.
    INPUT: The lungs are well - expanded and clear . The heart is normal in size . The mediastinum is not widened . No pleural effusion or pneumothorax . No focal consolidation or edema . No evidence of acute fracture on these nondedicated views . There may an old right lower rib fracture .
    OUTPUT:
    
1 . No pneumothorax . 2 . No evidence of rib fracture on this single portable chest radiograph . If clinical concern for rib fracture persists , dedicated rib radiographs are recommended with a BB marker placed on the area / s of focal exam findings .