Becomming a radiological tech usually only requires a two year vocational course from a community college or hospital. Call around to your local community colleges and ask the admission office if they offer a program, if they don't they will probably steer you towards the nearest college who does.
If you would like to become a Radiologist on the other hand they are actually medical doctors and require a bachelors degree, medical school and then a residency for several years, usually 5 years.