Summarize the radiology report findings into an impression within 3 sentences.
    INPUT: AP portable upright view of the chest . Lung volumes are low limiting assessment . Mild bibasilar atelectasis is noted without convincing signs of pneumonia or edema . No large effusion or pneumothorax is seen . Cardiomediastinal silhouette appears normal . No acute osseous injury .
    OUTPUT:
    
Mild basilar atelectasis , otherwise unremarkable exam .