Summarize the radiology report findings into an impression within 3 sentences.
    INPUT: Since the prior radiograph , a feeding tube has been replaced with nasointestinal tube terminating in the third portion of the duodenum . Cardiomediastinal contours are stable . Improving linear atelectasis is present in the periphery of the right lower lobe , but a worsening patchy and linear opacity is demonstrated in the retrocardiac portion of the left lower lobe . Lungs are otherwise clear , and there are no pleural effusions .
    OUTPUT:
    
Worsening patchy and linear left lower lobe opacity favors atelectasis , but coexisting pneumonia is also possible in the appropriate clinical setting . Short - term followup radiographs may be helpful in this regard .