Summarize the radiology report findings into an impression within 3 sentences.
    INPUT: AP upright and lateral views of the chest were obtained . The lungs are clear , though low lung volumes somewhat limit the evaluation . There is no pleural effusion or pneumothorax . Cardiomediastinal silhouette is stable and there are atherosclerotic calcification along the aortic knob . There is tortuosity of the thoracic aorta . Bony structures appear intact . Old left rib cage deformities are again noted .
    OUTPUT:
    
No acute findings in the chest .