Summarize the radiology report findings into an impression within 3 sentences.
    INPUT: The airways are clear . The chest is well expanded and clear without focal consolidation , pulmonary edema , or pneumothorax . The cardiac and hilar contours are within normal limits . No pleural abnormalities or effusions noted . Mild degenerative changes of the mid-thoracic spine noted .
    OUTPUT:
    
Normal chest radiograph without evidence of pneumonia