Summarize the radiology report findings into an impression within 3 sentences.
    INPUT: Frontal and lateral chest radiographs demonstrate unremarkable cardiomediastinal and hilar contours . Symmetric partially circumscribed nodular densities projecting over the lung bases are likely nipples . Lungs are clear . Redemonstration of multiple healed right - sided rib fractures . No pleural effusion or pneumothorax is evident .
    OUTPUT:
    
No acute intrathoracic process .