Summarize the radiology report findings into an impression within 3 sentences.
    INPUT: Nodular opacities in the mid to low lungs bilaterally likely represent nipple shadows . If needed repeat radiograph with nipple markers may be obtained to further assess . Aside from this , lungs appear clear . No pleural effusion or pneumothorax is seen . Cardiomediastinal silhouette is normal . Bony structures are intact . No free air below the right hemidiaphragm .
    OUTPUT:
    
Prominent nipple shadows noted bilaterally . Otherwise normal .