Summarize the radiology report findings into an impression within 3 sentences.
    INPUT: The cardiomediastinal silhouette and hilar contours are unremarkable . Slight increased attenuation projecting over bilateral lung bases is similar to prior examination and corresponds to soft tissue folds on the lateral view . Lungs are clear . Pleural surfaces are clear without effusion or pneumothorax . No overt traumatic abnormality is identified .
    OUTPUT:
    
No acute cardiopulmonary abnormality . No overt traumatic findings . Dedicated rib series may be helpful if there is focality on physical exam .