Brainlab RT/RS Hardware User's Manual page 38

Collimator Mount
Do not use the Collimator Mount if the Collimator Mount, or part of it, is damaged or
warped.
Make sure that the coded plug does not come into contact with moisture or fluids as the
electronic parts might be destroyed or damaged.
The Collimator Mount Siemens with Coded Plug is classified IPX0 according to IEC 60529.
How to Attach the Collimator Mount
Steps
1.
2.
3.
4.
5.
6.
7.
Safety Notes
Never change the Collimator Mount while anyone is beneath the Collimator Mount.
When using the Collimator Mount Siemens with coded plug, use a Conical Collimator of
maximum ø 45mm field size for treatment.
After installing the Collimator Mount on the Linac, do not perform any Linac modifications
that could alter the distance between the source and collimator mount.
Verify for every treatment field that the correct, intended conical collimator - as specified in
the treatment parameter printout - is actually mounted to the Collimator Mount.
Prior to each treatment make sure that the coded plug of the Collimator Mount is detected
correctly. Siemens code "ST5VAR" must be detected.
Prior to each treatment field always make sure that the correct LINAC Jaw settings
according to the Treatment Planning are set up.
Every modification/update or change of the LINAC Console Software, of the R&V system or
any other LINAC system components that might have effect on the LINAC coding requires
a diligent checkup of the correct function/ detection of the coded plug.
Be aware that "ST5VAR" detection does not provide a verification or detection of Conical
Collimator.
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Position the gantry at 90° (270°) (according to the IEC 61217 scale).
Turn the linac collimator so that the accessory tray slot opening points upward at an angle
of 225° (45°) (according to the IEC 61217 scale).
Unscrew the two fixation screws ④ so that they do not protrude.
Slide the collimator mount completely into the accessory tray slot. Make sure that the side
with beveled corners is inserted first. This is the only way the collimator mount can be at-
tached securely.
Make sure that the accessory locking mechanism of the Linac is engaged. Refer to the
linac manufacturer's manual for further information on attaching/detaching accessories.
With the fixation screws still open, carefully try to remove the locked collimator mount
from the accessory holder. The locks must work effectively so that removal is not possi-
ble.
Once you are sure that the accessory locking mechanism of the Linac is properly engag-
ed, push down the Collimator all way down again and then firmly tighten both fixation
screws by hand.
Hardware User Guide Rev. 4.9 RT / RS Stereotactic Hardware