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 appears mild to moderately enlarged . Mediastinal and hilar contours are unremarkable . Crowding of the bronchovascular structures likely is due to low lung volumes . No overt pulmonary edema . Patchy opacities in the lung bases likely reflect atelectasis in the setting of low lung volumes . No pleural effusion or pneumothorax is identified . No acute osseous abnormality is detected .
    OUTPUT:
    
Low lung volumes with probable bibasilar atelectasis .