extremely safe level light those we're also targeting something that might have a more immediate application which is breast cancer staging you might have heard that the standard breast cancer staging is invasive you have to surgically remove the first draining node or the central nerve node what we want to do is to inject organic dye near the tumor it's gonna flow toward a central enough node then we use the photo acoustics to detect us in the lymph node and use a needle which is guided by the photo acoustic technology