Summarize the radiology report findings into an impression within 3 sentences.
    INPUT: AP and lateral views of the chest : The lungs are clear . There is no pleural effusion , pneumothorax or focal airspace consolidation to suggest pneumonia . The heart size is normal . The mediastinal contours are unremarkable . Calcification of the anterior longitudinal ligament is noted .
    OUTPUT:
    
No acute intrathoracic process .