Summarize the radiology report findings into an impression within 3 sentences.
    INPUT: The lungs are well expanded and clear . The cardiac silhouette is top normal . The mediastinal silhouette and hilar contours are normal . No pleural effusion or pneumothorax is present . Prominent right superior mediastinal contous is likely related to ectatic vasculature . Mild degenerative disc and joint disease is noted of the thoracic and lumbar spine .
    OUTPUT:
    
No acute intrathoracic process .