Summarize the radiology report findings into an impression within 3 sentences.
    INPUT: Portable frontal chest radiograph demonstrates low lung volumes and bibasilar atelectasis . There is no focal consolidation , pleural effusion , or pneumothorax . There is no evidence of pulmonary vascular congestion . The cardiomediastinal silhouette is normal .
    OUTPUT:
    
No acute cardiopulmonary process .