Summarize the radiology report findings into an impression within 3 sentences.
    INPUT: The lungs are normally expanded without focal airspace opacity . The cardiomediastinal silhouette and hilar contours are stable without cardiomegaly . There are aortic calcifications . There is no pleural effusion or pneumothorax . Bilateral ovoid densities projecting over the lower lung fields likely reflect nipple shadows . There is similar degree of rightward curvature centered over the thoracic spine . There are postoperative changes projecting over the upper mediastinum and neck with anterior and posterior fusion hardware and surgical clips .
    OUTPUT:
    
No evidence of acute cardiopulmonary abnormality .