Summarize the radiology report findings into an impression within 3 sentences.
    INPUT: PA and lateral views of the chest were reviewed . Cardiomediastinal and hilar contours are unremarkable with calcification of the aortic knob . There is no pleural effusion or pneumothorax . The lungs are well expanded and clear . There is no pulmonary edema . Degenerative changes are seen in the thoracic spine .
    OUTPUT:
    
No acute cardiopulmonary process .