Bhargava Chandra Devineni

Hello everybody, My name is Bhargava. I'm a medical graduate from India. Though I've got into medicine for some reasons I have a great passion for Robotics and AI. So could someone please let me know any way I can do a PhD in Robotic or AI in the Carnegie Mellon. That being said, I would like to say that I'm aware of the fact that this path is extremely competitive and challenging. And since my aim is to dedicate the rest of my career life to the research, it doesn't matter how long it takes for me to get there. Please suggest me any possible way to get there. It doesn't matter if I have to do masters or additional research prior to applying or any competitive test that I need to take apart from GRE and TOEFL. Awaiting reply..... Thank you, Bhargava.