Summarize the radiology report findings into an impression within 3 sentences.
    INPUT: Frontal radiograph of the chest demonstrates interval change in position of NG tube which is now looped in the mid esophagus and projects cranially , distal tip is not visualized on this study . The lung volumes remain low , unchanged since the prior study . No evidence of complications , notably no pneumothorax .
    OUTPUT:
    
Malposition of esophageal tube . The above findings were communicated to Dr . ___ , ___ page by Dr . ___ at ___ , at the time of discovery .