to take cells out of the simple nerves node do you test if there's any presence of cancer cells so once this is a proven we can convert the surgical surgical procedure into a needle biopsy procedure this is some of the initial test results in humans you can see the central nodes note we can see the needle here at as well in there another clinical problem is to monitor the brain oxygen consumption in the surgery you want to do it in the war but there's no non-invasive technique allows us to do that well so the current technique is