Summarize the radiology report findings into an impression within 3 sentences.
    INPUT: Overlying trauma board slightly limits assessment . The lung volumes are low . This accentuates the size of the cardiac silhouette which is mildly enlarged . There is no mediastinal widening . Crowding of the bronchovascular structures is likely related to low lung volumes . Mild atelectasis is noted within the lung bases . No focal consolidation , large pleural effusion or pneumothorax is identified . No displaced fractures are seen .
    OUTPUT:
    
Low lung volumes with mild bibasilar atelectasis . No acute traumatic injury identified .