Summarize the radiology report findings into an impression within 3 sentences.
    INPUT: Low lung volume with subsegmental atelectasis in the lung bases . No interstitial edema . The cardiomediastinal silhouette is within normal limits for portable chest x-ray . No pleural effusions or pneumothorax . Moderate distention of the gastric bubble .
    OUTPUT:
    
Low lung volumes with subsegmental atelectasis .