Summarize the radiology report findings into an impression within 3 sentences.
    INPUT: There has been interval removal of a nasogastric tube . The lungs are well expanded without pleural effusion , pneumothorax , or pulmonary edema . Patchy opacity at both lung bases most likely reflects atelectasis when correlated with an abdominal CT dated ___ and plain radiograph ___ . The cardiomediastinal silhouette is unchanged in appearance . There is no evidence of pneumoperitoneum .
    OUTPUT:
    
No acute cardiopulmonary process . Patchy bibasilar atelectasis . No free intraperitoneal air .