Brainlab RT/RS Hardware User's Manual page 72

Imaging with the Headring and Mask System
No.
PVC Localizer Rods
Six PVC localizer rods ① are embedded into the acrylic glass of the localizer. In the axial CT
images, they are visible as six index markers. These markers provide the geometric matrix for
determining the exact position of any structure relative to the headring and mask system.
X-Ray Inserts
Four copper squares ② are built into the localizer plates. For each x-ray image, one pair of the
copper squares are used to localize structures in relation to the headring. These inserts enable
planar projection x-ray and stereotactic localization in angiography.
Removing the X-Ray Inserts
If you find artifacts in CT images, remove the x-ray inserts.
Steps
Reattaching the X-Ray Insert
To reattach the x-ray insert:
• Place the lower edge of the insert into the holding groove at the bottom of the localizer plate.
• Refasten the holding screw at the top of the x-ray inserts.
72
Component
③
Holding spigot
④
Holding screw
Unscrew the holding screw ④ using a small screwdriver.
1.
2. Remove the x-ray insert.
Hardware User Guide Rev. 4.9 RT / RS Stereotactic Hardware