When I was pregnant, I must have spent half my check-ups on a bed with a sonography technician doing his magic on my belly... to later assure me that my baby is okay.
With the advent of modern technology, equipments are getting more and more sensitive, specialized and definite. Sonography schools probably invest in all the latest lab equipment so that the sonography tech graduating from their school can competently operate these machines and facilitate great medical service.
We've really come a long way. Before, there weren't even ultrasound machines, now, clinics in malls have sonography technicians performing 3D/4D ultrasounds. And what does this all mean? Healthier babies and peace of mind for their Mommies.