Patent ID: 11957445
Assignee: MEDTRONIC NAVIGATION, INC.
Field: Medical technology (Instruments)
Classification: CPC A | IPC A

Claim 0:
1. A method of maintaining a registration of a subject space to an image space, comprising:
fixing a mounting portion of a dynamic reference frame to a subject in the subject space;
placing a tracking device at a first configuration relative to the fixed mounting portion in the subject space;
operating a navigation system having a processor to register the subject space to the image space while the tracking device is placed at the first configuration in the subject space;
moving the tracking device to a second configuration relative to the fixed mounting portion, wherein the tracking device in the second configuration is in the subject space;
tracking the tracking device at the first configuration and the second configuration with a localizer from a localizer position;
operating the processor to determine an adjustment factor that defines at least a translational change of the tracking device based at least on a plurality of known configurations stored with a memory; and
operating the navigation system having the processor to maintain the registration after the translational change of the tracking device at least by application of the adjustment factor to the registration of the subject space to the image space.