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Microscope Navigation
Verifying the Calibration
Verification
You can verify the calibration using either the reference array cone or anatomical or pre-
Methods
planned landmarks. Verification using the cone verifies both the tracking calibration and the
HUD calibration.
You can verify calibration at any time during navigation.
NOTE: BrainLAB provides cross-hair oculars for integrated microscopes. Using the
cross-hair aids in the verification and calibration of the microscope. The ocular may be re-
placed with a standard, clear one after calibration.
How to Verify Using
the Cone
Steps
1.
2.
3.
4.
5.
Software User Guide Rev. 1.0 Kolibri cranial/ENT Ver. 2.7
Focus the microscope at maximum zoom on the bottom of the reference array
cone.
For best results, position the microscope directly over the reference array. Try to
focus as perpendicular as possible to the plane of the array to avoid distortions.
The angle between the axis of the array and the focal axis of the microscope is
displayed in the microscope video view.
The distance from the navigated focal point to the cone is displayed at the bottom
of the views. This value shows the deviation of the current calibration.
Verify that the deviation is within an acceptable range.
The displayed outlines should match the actual reference array and cone.
Verify that the match of the outlines is acceptable.
Repeat the above steps at different distances between the microscope and the ref-
erence array.
• If accuracy is sufficient, press
• If accuracy is insufficient, press
tion
dialog.
Next
.
Recalibrate
to open the
Microscope Calibra-
209
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