Landmark registration uses a paired point matching technique to correlate the image set to the actual patient anatomy.
- Multi-Modality Donut Registration Markers worn by the patient during scanning
- Anatomical landmarks
Before You Begin
Do not remove markers from the patient’s skin until patient registration has been performed. Otherwise, these markers cannot be used for Landmark registration.
Placing Multi-Modality Donut Registration Markers
At least four landmarks are required for registration. It is recommended to attach six or seven markers to the patient to ensure a sufficient number of landmarks in case markers fall off.
- Position the fiducial markers/landmarks around the head, as randomly and far apart as possible. Avoid placing fiducial markers/landmarks in a symmetric structure (e.g., in a row or regular shape).
- The fiducial marker/landmark positions should surround the region of interest.
- Avoid areas with loose skin.
When registering markers and pre-planned landmarks, hold the tip perpendicular to the marker/landmark. This prevents inadvertent skin shifting caused by the force of the instrument.
|Multi-Modality Donut Registration Markers|
|Screws||Softouch or Brainlab Pointer, Blunt Tip: Place the tip on the center of the screw and slowly pivot while keeping the tip in place.|