At least in Germany, the ultrasound machines that most vets have are second-hand from (human) physicians and look older. I have yet to be at a doctor's office in Germany that didn't have an ultrasound, even general practitioners ("Hausarzt"). The concept of sending a patient off to an ultrasound technician for a routine scan seems baffling to German physicians.

Sources: asking the two vets I've brought birds to here, own visits to doctors