Summarize the radiology report findings into an impression within 3 sentences.
    INPUT: Heart size is normal . Mediastinal and hilar contours are unremarkable . Pulmonary vasculature is not engorged . Apart from atelectasis in the lung bases , lungs are clear without focal consolidation . No pleural effusion or pneumothorax is present . No acute osseous abnormality is visualized .
    OUTPUT:
    
Minimal bibasilar atelectasis . Otherwise no acute cardiopulmonary abnormality .