Summarize the radiology report findings into an impression within 3 sentences.
    INPUT: The lungs are clear . Nodular opacities overlying the lung bases bilaterally are compatible with nipple shadows . The cardiomediastinal silhouette is within normal limits . No acute osseous abnormality is identified . Chronic likely posttraumatic changes identified at the right acromioclavicular joint .
    OUTPUT:
    
No acute cardiopulmonary process .