alt Hacker NewsAfter reading this first, it looked almost like a joke, like how Google used to do Google- TISP Toilet Internet Service Provider https://archive.google/tisp/install.html
Even now without Xrays it is very hard to really even see if there are blocks in your artery usuing ultrasound (Echocardiography alone). Ultrasound is used indirectly by measuring blood flow difference between stress and rest - not a spa session anyway. Looks like a prank really
3D Ultrasound helps a lot in this regard. Getting flow velocity out and tissue motion is very possible if you can support the data rates (in my group we've had some luck getting coronary artery 3D flow out using 3D ultrasound probes). The issue is that 2D ultrasound and flow is an unsolvable problem, so you really do need all 3 dimensions here.