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 is top normal . Mediastinal and hilar contours are normal . The pulmonary vasculature is normal . Streaky opacities in the lung bases likely reflect atelectasis in the setting of low lung volumes . No large pleural effusion , focal consolidation or pneumothorax is present . No subdiaphragmatic free air seen .
    OUTPUT:
    
Low lung volumes with probable bibasilar atelectasis .