What degree in the healthcare field should I secure my degree in?

I don't want a Nurses degree, or Healthcare administration jobs, nor Medical assistant, nor Patient care technician. Absolutely nothing to do with blood and needles. I have narrowed it down to these two fields and I need a little more confidence before choosing. First, a DTR( Dietitian Technician)this requires only an associates degree but makes only 25k-30k a year. a RD(registered dietitian) I hear they make upwards of 50k a year. There is not a huge job market demand for these positions, but Americans aren't getting any healthier :-) and the job seekers for these positions are not numerous. Or seek a degree in Diagnostic Medical Sonography. An associates degree will leave me with the basics and further education can branch into specialties, cardiac, respiratory, gynecology. The earning potential with this degree I feel is a lot less limited than that of the Dietetics field. I am most passionate about the Dietetics but feel an urge to seek a better paying degree. Anyone with any personal experience with either field can you help guide me to the best decision for me? Thanks!