Summarize the radiology report findings into an impression within 3 sentences.
    INPUT: The lungs remain clear without consolidation or edema . Mild aortic tortuosity is stable . The cardiac silhouette is within normal limits for size . No effusion or pneumothorax is noted . The visualized osseous structures are unremarkable . Changes are seen throughout the thoracic spine .
    OUTPUT:
    
No acute pulmonary process .