Summarize the radiology report findings into an impression within 3 sentences.
    INPUT: The lungs are normally expanded and clear . Rightward rotation of the patient somewhat limits evaluation of the mediastinal structures , however the heart is not enlarged and the mediastinal contour is grossly normal . There is no focal airspace opacity to suggest pneumonia . There is no pleural effusion or pneumothorax . There is no evidence of thoracic vertebral compression or displaced rib fracture .
    OUTPUT:
    
No definite thoracic or rib abnormality is detected within the limitations of routine radiography .