Northern Digital Inc.

Established in 1981 and now a subsidiary of Roper Industries, NDI is a worldwide leader in medical measurement solutions. NDI designs and manufactures advanced tracking systems including optical tracking systems Polaris series and electromagnetic tracking systems Aurora and 3D Guidance series. With more than 40,000 systems installed worldwide, the applications cover neuro, orthopedics, intervention, radiotherapy, endoscope, dental, ENT, surgical robotics, and virtual reality where NDI technologi