Summarize the radiology report findings into an impression within 3 sentences.
    INPUT: Study is slightly limited due to patient rotation . Lung volumes are low . Cardiac and mediastinal contours are unchanged . Crowding of bronchovascular structures is likely due to low lung volumes . There is minimal atelectasis at the lung bases without focal consolidation . No pleural effusion or pneumothorax is seen . Rightward deviation of the trachea is re - demonstrated and due to a left - sided thyroid nodule . Multilevel degenerative changes are seen in the thoracic spine .
    OUTPUT:
    
Low lung volumes with bibasilar atelectasis .