I finally felt like the choice of my own career belonged to me. Health-care was my passion and the opportunity had finally come
for me to make my own decision.
---I wouldn't use the word "arrive" again so soon.---
My first job in the United States
was as an Anesthesia technician at Brackenridge/Children Hospital of Austin. It was a
job that gave me ample opportunity to research and observe the majority of health-care careers.
In my search for my future career I received input from every health-care professional
I ever met about the positive and negative aspects
---Again, I wouln't use the word "career" again
so soon.--- (heh, heh get it?...nvm...)
The final input came from my brother-in-law, a cardiologist, which
introduced me to the field of echocardiography.
Overall good job in showing your ample work experience and story. One thing that could be just a matter of taste is that you might want to talk more about what you like about sonography specifically. You spend alot of time talking about how you got to the point where you decided to get into your chosen field but not explicitely why.
As it stands it looks like the only reason you want to go into sonography is because you wish you could understand the big words your brother was saying to you. There are big words thrown around in many scientific professions so why choose this one?
You could talk about how sonography allows you to connect with the patients more by giving them a visual that they can understand for what is happening inside them. This can be comforting as most people going to the hospital don't really understand all the technicalities of what their doctors are talking about. A picture, however, can be of great comfort and understanding for patients. (I don't know, maybe you wont be showing the patients their echo pictures but just try to come up with something more specific for why you chose this field. Good luck!)