 My name is Elias Taktidis. I'm a professional in biomedical engineering in the University of London, in the Department of Medical Physics and biomedical engineering. From the go-ahead, one of the things that I do teach to my younger students is all the opportunities that we have by being an engineer. I do teach a lot of medical students as well that there are some hidden engineers in them. For me, an engineer is somebody that can see ways of building something, putting something together, looking at different ways to look at a problem and see that that needs to be solved through some new development. I lead the metabolite group, which is to develop the new instruments in the hospital and try to help our clinical colleagues. The key thing that we're trying to do with this technology is to try to measure the brain oxygen levels and the brain metabolic levels. And we wanted to do that in a non-destructive way at the patient bedside without affecting this very sensitive population of newborn babies. For us, that is an engineering challenge. So light is safe because we surround it by light. The type of light that we're using is infrared light and that is a particular type of the spectrum. You cannot see with your naked eye, but it can actually penetrate deep into the tissue. And as it happened, we discovered that it would be absorbed by the hemoglobin, the main carrier of oxygen in your blood. And when it does that, it changes color and we can identify that change in color, so we can identify the changes in blood volume and oxygen levels. My approach is a team approach. My approach is trying to have my team together and work with them to actually, first of all, identify the problems and then see how we can solve them together. And the good thing about my team is that we are a multidisciplinary team. We are engineers, clinicians working together, physicists, mathematicians, so we can actually bring analogies all together to solve the difficult problems. You need all these people together. Talking with my clinical colleagues and sort of learning that we discovered something, we did something important. We actually made a difference in just a single patient. That, for me, it makes my whole day.