EBRT is the general method of aiming radiation from outside the body, while IMRT and SBRT are specific, advanced techniques that shape and focus the radiation beams differently. I think IMRT and SBRT are more advanced and accurate. For some reason SBRT can be done in like 5 sessions and IMRT is maybe 40. I would guess SBRT uses high dose of radiation and may be more accurate and used for small area. But as said I am new to all this and learning as may need radiation depending on how PSA does after prostatectomy.