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 likely top normal . The mediastinal contour appears widened , likely due to low lung volumes , with crowding of the bronchovascular structures . There is hazy opacification within both lung bases likely reflective of atelectasis . No pneumothorax is detected . No acute osseous abnormalities are seen .
    OUTPUT:
    
Low lung volumes limit assessment of the lung bases . Bibasilar atelectasis is likely present though infection can not be excluded .