Summarize the radiology report findings into an impression within 3 sentences.
    INPUT: The ascending aorta is moderately tortuous . Heart size is normal . The lung fields are clear . No pneumothorax or pleural effusion . Mild compression deformity of a midthoracic vertebral body .
    OUTPUT:
    
No acute cardiopulmonary abnormality . Mild compression deformity of a midthoracic vertebral body .