Summarize the radiology report findings into an impression within 3 sentences.
    INPUT: The heart size is normal . The aortic knob is calcified . No focal consolidation , pleural effusion or pneumothorax is seen . The pulmonary vasculature is normal . Convexity noted overlying the left paraspinal region at the level of the diaphragm may reflect a small hiatal hernia . Degenerative changes are noted throughout the thoracic spine .
    OUTPUT:
    
No acute cardiopulmonary abnormality . Probable small hiatal hernia .