Summarize the radiology report findings into an impression within 3 sentences.
    INPUT: The lungs are normally expanded and clear . Costochondral calcifications project over the airways on the frontal radiograph and should not be mistaken for lung masses . There is no evidence of pneumonia . Heart size is normal . The mediastinal and hilar contours are normal . The aorta is unfolded . There is no pleural effusion or pneumothorax . Bibasilar atelectasis is mild .
    OUTPUT:
    
No acute cardiopulmonary abnormality .