Here is a link to their prerequisite requirements: Program Details
Looks the same as most programs: English, Math, Psych, and Communication + the sciences with Anatomy and Physiology I & II, General Chemistry, and Microbiology. It seems they use a points scale too for admissions. Most RT programs have the same or almost the same prereqs as the RN programs in the same schools with the exception of a physics requirement, so if you're good to go for nursing you should be good to go for RT as well.
Interestingly enough though, it appears Mt. Hood's RT program doesn't require physics. Most RT programs require that, but without it that would be one less class you'd have to worry about. Although, as an RT myself I would strongly recommend taking it if you're able to. Everything in RT (ventilators, BiPAP's, oxygen delivery, hemodynamics, ECMO, IABP) is heavy on the physics and not having a physics class puts you at a pretty severe disadvantage in regards to the depth of comprehension required for your boards and for clinical practice.
It's not required, and you can always learn as you go - it's just a lot harder is all.
Either way, good luck in whichever path you choose. Feel free to PM me if you have any other RT related questions.