Summarize the radiology report findings into an impression within 3 sentences.
    INPUT: The left - sided pacemaker is noted with the leads terminating in the expected position of the right atrium and right ventricle . The cardiomediastinal silhouette is stable . There are bibasilar linear opacities representing atelectasis . There is no effusion or pneumothorax . Degenerative changes of the thoracic spine are noted .
    OUTPUT:
    
No acute cardiopulmonary process . Bibasilar atelectasis .