What undergrad degree you do doesn't make a dang bit of difference as far as getting into PT school as long as all the pre-reqs have been met, as far as I can tell. A year of anatomy/physiology, a year of physics, a year of chemistry, a year of psychology, a year of biology, an upper level biology class or two (such as cell biology, developmental biology, immunology, genetics, etc., etc.), a year of english comp (which will be required by every university as a GE requirement anyway), a semester of statistics and a semester of mathematics (perhaps calculus) will cover your bases at the majority of schools. Most will require some combination of these but not necessarily all of them. Probably 30-40% of the schools I've looked at require an exercise science class, and a few require something random like nutrition or economics, but not many.
If medical technologist is an effective degree for meeting pre-reqs, then I would take it. A lot of people have kinesiology/exercise science degrees but you will do fine in PT school if you don't, PT school is there to teach you what you need to know to be a PT. A guy I know in PT school told me he thought his biology degree was the best undergrad degree there was for preparing you for the firehose of information you get hit with the first year in PT school. You need to enter grad school with a solid knowledge of the basic sciences, not with the knowledge of how to do physical therapy.
