Summarize the radiology report findings into an impression within 3 sentences.
    INPUT: The lungs are well expanded and clear . Minimal atelectasis is seen in the left lung base . Cardiomediastinal silhouette is unremarkable . There is no pneumothorax or pleural effusion . Degenerative changes are seen in bilateral shoulders and acromioclavicular joints .
    OUTPUT:
    
No acute cardiopulmonary process .