Summarize the radiology report findings into an impression within 3 sentences.
    INPUT: The heart size , mediastinal , and hilar contours are normal . The tortuous aorta is unchanged , and slightly more calcified . The lungs are clear without pleural effusion , focal consolidation , or pneumothorax . Significant degenerative change of the thoracic spine is noted .
    OUTPUT:
    
No evidence of acute cardiopulmonary process , pulmonary mass , or pneumonia .