Summarize the radiology report findings into an impression within 3 sentences.
    INPUT: The lungs are well inflated , with no parenchymal opacity identified . The pleural and hilar surfaces are unremarkable . There is no pneumothorax . The aorta is quite tortuous , but the cardiomediastinal silhouette is unchanged compared to the prior study , with a top - normal sized heart .
    OUTPUT:
    
No radiographic evidence of underlying pulmonary drug toxicity . Tortuous aorta .