Summarize the radiology report findings into an impression within 3 sentences.
    INPUT: Portable semi upright frontal view of the chest . The lungs are clear without focal opacity , pleural effusion or pneumothorax . The cardiac and mediastinal contours are normal . No acute soft tissue or osseous abnormality is seen . An old third left anterior rib fracture is noted . Known nondisplaced left 5th rib fracture is not seen .
    OUTPUT:
    
No visualized pneumothorax on this semi erect film .