Summarize the radiology report findings into an impression within 3 sentences.
    INPUT: The cardiomediastinal and hilar contours are stable with tortuosity of the aorta . There is no pneumothorax or large pleural effusion . Left basilar atelectatic changes are similar to the prior exam . There is no new focal consolidation concerning for pneumonia . Pulmonary vascularity is within normal limits .
    OUTPUT:
    
No acute cardiopulmonary process . Stable appearance of left lower lobe atelectasis .