Summarize the radiology report findings into an impression within 3 sentences.
    INPUT: The lungs are well - expanded and clear . The cardiomediastinal and hilar contours are unchanged . The aorta is tortuous . A nodular opacity projecting over the left upper lung appears unchanged from ___ , and is without anatomical correlate on CT torso from ___ although may be related to fragmented ossification at the first rib costochondral junction . Degenerative changes in the thoracic spine .
    OUTPUT:
    
No acute cardiopulmonary process seen .