What are good medical fields that only require a certificate program
or 2-year Associates degree?  I was looking up more information about
being an Ultrasound Technician, X-Ray Technician, or MRI Technician. 
I do know that for becoming an Ultrasound Technician there is about 2
years of school, although I can't find any schools that offer that. 
I've also heard of Medical Assistant and Physc Tech which both have
short school programs, but I prefer not having a career that involves
drawing out blood and also Medical (Doctor's)Assistant and Pharmacy
Technician are publicized a lot in my area because of constant
commercials on TV for these careers.  I would rather not go with a
career that already is saturating the market (not likely to find a job
after completing the education).

So what I need to know are some good medical careers that only require
2 years or less of school, a description of what is involved after I
get a job, how difficult each school program is, and websites that may
help me find a school in California.