I would say it would be useful not necessarily you know absolutely necessary to ask for an fdg-pet scan and do a PET CT especially I mean with GBM it's gonna light up like there's no tomorrow right so just for the listener so fdg-pet means you take glucose you label glucose with a molecule yeah and then when you do the PET scan shows by lighting up anything that absorbs that and the most rapidly metabolizing tissues of glucose light that up which is almost always any cancer and then a brain normally lights up so a brain with cancer takes that to another level yeah so you're doing that to document that this is a high glycolytic tumor yeah okay