Summarize the radiology report findings into an impression within 3 sentences.
    INPUT: Heart size is normal . Cardiomediastinal silhouette and hilar contours are unremarkable . Atherosclerotic calcifications are noted within the aortic arch . Lungs are clear . There is no pleural effusion or pneumothorax . Scattered pleural plaques are again noted and unchanged .
    OUTPUT:
    
No acute intrathoracic process .