vivo and watch how red blood cells bifurcate at this Junction we can also look at the color of each red blood cell and look at how oxygen is released from red blood cells as we know red blood cells are oxygen carriers so this is the ultimate level oximetry it allows us to study some of the fundamental biology related to oxygen delivery and of course this is very much relevant to to cancer metabolism now this is very recent the data is unpublished as we know cancer primary tumor will not normally kill patients is the metastasis that kills