Summarize the radiology report findings into an impression within 3 sentences.
    INPUT: Frontal and lateral views of the chest . The lungs are clear without consolidation , effusion or pulmonary vascular congestion . Cardiac silhouette is within normal limits . Tortuosity of the thoracic aorta is again seen with atherosclerotic calcifications at the arch and a prominent contour of the ascending aorta . No acute osseous abnormality is identified . Degenerative changes are noted at the left acromioclavicular joints as well as mild compression deformity of an upper thoracic vertebral body as seen on prior .
    OUTPUT:
    
No acute cardiopulmonary process .