Summarize the radiology report findings into an impression within 3 sentences.
    INPUT: No significant interval change . Lung volumes are slightly low , perhaps related to respiratory effort . The lungs are clear . No edema , effusion , pneumothorax , or focal consolidation . The cardiomediastinal silhouette is normal . The hila and pleura are unremarkable . No acute osseous abnormality . Mild degenerative changes in the visualized thoracic spine are similar to the prior exam .
    OUTPUT:
    
No acute cardiopulmonary process .