Summarize the radiology report findings into an impression within 3 sentences.
    INPUT: Lung volumes are low . This accentuates the size of the cardiac silhouette which otherwise appears normal . Mediastinal and hilar contours are unremarkable . Apart from mild bibasilar atelectasis , the lungs are clear . No focal consolidation , pleural effusion or pneumothorax is seen . No acute osseous abnormalities demonstrated . Multilevel degenerative changes are present within the thoracic spine .
    OUTPUT:
    
No acute cardiopulmonary abnormality .