Are there accredited Sonographer programs for online study? What about Radiology Techs?

I live in a fairly rural area and am looking to persue a career as either a Radiology Tech or Sonographer. I have an ociates degree in communications so I was wondering if there are any online programs for certification without having to take the whole ociates program again. All I can find for online schooling have to do with ociate of Applied Science Programs. Any help is greatly appreciated :)