Summarize the radiology report findings into an impression within 3 sentences.
    INPUT: Cardiac silhouette is top - normal in size . There is mild vascular congestion . The thoracic aorta is tortuous . Lungs are grossly clear . There is no pneumothorax or pleural effusion . There is no acute osseous abnormality . There are degenerative changes of the bilateral acromioclavicular joints .
    OUTPUT:
    
No evidence of pneumonia .