Northern Digital Inc.

Olaf Zerres

Mark R Schneider

Stefan R Kirsch

Georg Brunner

Vladimir F Kogan

Christian J Schilling

Nikolai Mikuszeit

Westley D Ashe

A system comprising: a sensor configured to be introduced into a clearance hole of a surgical implant, wherein the sensor is configured to be introduced in proximity to a generated magnetic field and cause distortion of the magnetic field; and one or more field measuring coils configured to: measure a characteristic of the magnetic field when the sensor is in proximity to the magnetic field; and provide, to a computing device, a signal representative of the measured characteristic of the magnetic field, wherein the computing device is configured to determine one or both of a position and an orientation of the sensor and the clearance hole based on the measured characteristic of the magnetic field.

Tracking a cylindrical opening

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Radolfzell, Germany

Olaf Zerres