looking for a job, page-23

"Neurosurgery numbers in the U.S.A

Average annual revenue generated by each surgeon
More than $1.6 million

Average salary for neurosurgeons
About $670K

Top Pittsburgh neurosurgeon salary
More than $2.5 million

Estimated surgeries performed every year in the United States
906,500

Sources: Merritt Hawkins 2013 Physician Inpatient / Outpatient Revenue Survey; Neurosurgery Executives' Resource Value Education Society "

906,500 surgeries in the U.S in 2013 that may equate to a lot of the Zeiss/Optiscan machines.
Additionally the sheath sales will be Massive.