Summarize the radiology report findings into an impression within 3 sentences.
    INPUT: Frontal and lateral views of the chest were obtained . The lungs are well expanded without focal consolidation , pleural effusion , or pneumothorax . Pulmonary vasculature is normal without pulmonary edema . Heart size is normal . Mediastinal silhouette and hilar contours are normal aside from unchanged mild aortic tortuosity . A healed left rib fracture is seen . There is no free air under the diaphragm . Degenerative changes are seen in the thoracic spine .
    OUTPUT:
    
No acute intrathoracic process .