Summarize the radiology report findings into an impression within 3 sentences.
    INPUT: Frontal and lateral chest radiographs demonstrate a normal cardiomediastinal silhouette . Low lung volumes somewhat limit evaluation , resulting in bronchovascular crowding and bibasilar atelectasis without focal consolidation . No pleural effusion or pneumothorax is seen . Marked degenerative changes of the thoracic spine are unchanged .
    OUTPUT:
    
No acute cardiopulmonary process .