Summarize the radiology report findings into an impression within 3 sentences.
    INPUT: The lungs are clear with no pneumothorax , pleural effusion or focal airspace consolidations . The cardiomediastinal silhouette , pulmonary vasculature and hilar contours are unremarkable . There are multilevel degenerative changes along the thoracic spine .
    OUTPUT:
    
No acute intrathoracic process .