Chemotherapy is a scam. Blasting yourself with radiation to cure cancer is like setting yourself on fire to heal a burn. The only thing chemo will do is increase your chances of getting leukemia. I recommend you do alot of research on radiation, cancer, and chemo before you go through with this.
P.S Rather than smoke pot you should Eat candy (jolly ranchers) laced with hash oil. There's a lot research that suggest THC kills cancer cells.