Summarize the radiology report findings into an impression within 3 sentences.
    INPUT: There is stable calcification of the aortic arch . The size of the cardiomediastinal silhouette is at the upper limits of normal and stable . The lungs are clear , without consolidations or pulmonary edema . Trace bilateral pleural effusions are unchanged . There is no pneumothorax .
    OUTPUT:
    
No evidence of pneumonia .