Summarize the radiology report findings into an impression within 3 sentences.
    INPUT: The lungs are clear of focal consolidations . Streaky atelectasis at both lung bases is present . Cardiac silhouette is normal in size . Tortuosity of the thoracic aorta is again noted , with possible dilatation of the ascending aorta , unchanged . No pleural effusion or pneumothorax .
    OUTPUT:
    
No evidence of pneumonia .