Summarize the radiology report findings into an impression within 3 sentences.
    INPUT: The lungs are clear of airspace or interstitial opacity . The cardiomediastinal silhouette is unchanged with unfolding of the thoracic aorta and moderate calcifications of the aortic arch . No pleural effusions or pneumothorax .
    OUTPUT:
    
No acute radiographic intrathoracic pulmonary disease