So far up to date, there are many different companies out there like ZONARE, PHILIPS, GE, SIEMANS which are the big companies. Basically there used to be many more companies, but most of them merged with these companies. There are still smaller ultrasound companies out there trying to make it.
This is big business especially since imaging is the forefront in medicine before surgeries.
That is why quality counts over the amount of studies being done a day.
I spoke yesterday about how if licensure matters. If there were licensure in the ultrasound community I hope that it could be a National licensure where if I moved to different state I would not have to get relicensed for that state. ARDMS, American Registry for Diagnostic Medial Sonography is the recognized all over as the credentialing organization that most people know about. CCI, Cardiovascular Credentialing International is the other organization that technologists get credentialed in as well.
Ultrasound scanning is about quality first!