A section != a region. Querying images for a location via ```irsa_dust```,  returns an xml response that has an image for each of the sections - emission, reddening and temperature.  ```get_images``` will return all these images together as a list. The section query may be required if the user wants to get the image for only one of these sections and not all three. But I don't know if this would be an expected use case? An example of the xml output is  http://irsa.ipac.caltech.edu/applications/DUST/docs/dustProgramInterface.html#result