Why use doppler? Doppler is actually an application which is widely use to detect the flow..in medical ultrasound, we use it to see the flow of vessels. Why is it important? Because we can differentiate between blood vessels and ducts. Nowadays, almost all medium low range system packed up with this application. And of course for end users who are new to this they have to learn this in advanced workshop. But it is not difficult to pick up this new skill but this will make you love your job more and the challenges won't let you stay monotonic in your working hours..trust me!