Summarize the radiology report findings into an impression within 3 sentences.
    INPUT: A single portable view of the chest demonstrates low lung volumes without pleural effusion , focal consolidation or pneumothorax . The hilar and mediastinal silhouettes are unremarkable . Calcifications of the aortic arch are again noted . Heart size is top normal . The lungs appear clear .
    OUTPUT:
    
No evidence of acute disease .