Summarize the radiology report findings into an impression within 3 sentences.
    INPUT: Single supine AP portable radiograph through the chest demonstrate low lung volumes with atelectasis or scarring at the bases . Aortic valve is again identified in the expected position . No focal consolidation convincing for pneumonia is identified . Multilevel compression fractures and vertebroplasties throughout the visualized spine are noted as are calcifications through the splenic artery within the left upper abdomen . Significant degenerative changes involving bilateral shoulder joints noted . There is no large pleural effusion or pneumothorax .
    OUTPUT:
    
Stable appearance of the chest without an acute abnormality detected .