Summarize the radiology report findings into an impression within 3 sentences.
    INPUT: Mild enlargement of the cardiac silhouette persists . The mediastinal and hilar contours are unchanged . The pulmonary vasculature is normal . Apart from mild bibasilar atelectasis , the lungs are clear without focal consolidation . No pleural effusion or pneumothorax is identified . There are mild degenerative changes noted in the imaged thoracic spine .
    OUTPUT:
    
No acute cardiopulmonary abnormality apart from minimal bibasilar atelectasis .