Summarize the radiology report findings into an impression within 3 sentences.
    INPUT: Lung volumes are low , due to elevation of the diaphragms during expiration . No evidence of free subdiaphragmatic air . Except for mild with basilar atelectasis , lungs are clear without focal consolidation , effusion , or pneumothorax . Cardiomediastinal silhouette is unremarkable .
    OUTPUT:
    
No evidence of free subdiaphragmatic air . Low lung volumes due to expiratory phase of this chest radiograph .