86 Software User Guide Rev. 1.0 Kolibri cranial/ENT Ver. 2.7
z-touch Registration
z-touch Registration
Ensuring Successful z-touch Registration
About Successful
Registration
Successful z-touch registration depends on the area of the patient’s head which can be ac-
cessed for laser point acquisition.
If access to suitable areas is restricted due to the surgical setting, try to scan as much of the
surface of the patient’s face as possible.
In some cases marker-based registration may be preferable, e.g., posterior fossa approach.
NOTE: Before you begin, consider carefully whether
z-touch
registration is suitable for
the current treatment, or if marker-based registration should be performed instead.
Suitable Scan
Regions
NOTE: Generally, all (bony) structures with a characteristic surface that does not change
during anaesthesia are appropriate for scanning.
Optimal
• Zygomatic bone: complete zygomatic bone
• Frontal bone: complete regions of the frontal bone which are not cov-
ered by hair
• Nose: bridge of the nose or nasal cartilages
• Ear: tragus
Possible
If the patient has been shaved, or using a pointer:
• Parietal bone
• Occipital bone
Avoid
• Eyes: Eyes must be taped carefully to prevent damage e.g., swelling.
Do not tape areas important for scanning.
• Ears (except tragus)
• Mouth and jowls: these areas are either not included in the scan or are
distorted by the intubation.
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