Summarize the radiology report findings into an impression within 3 sentences.
    INPUT: PA and lateral views of the chest provided . Retrocardiac opacity consistent with small hiatal hernia . Platelike left basal atelectasis noted . No signs of pneumonia or edema . No pleural effusion or pneumothorax . Cardiomediastinal silhouette is unchanged . Bony structures are intact .
    OUTPUT:
    
Small hiatal hernia again noted . Otherwise unremarkable .