Collimator Alignment Procedure _2

8/22/2019 Collimator Alignment Procedure _2

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Ceph Collimator Alignment Procedure

Prepared by: Greg Hecker

Date: 4/30/07Purpose: To install and align the Ceph collimator for both Pan and Ceph.

1)

Ensure Ceph Arm is Level and Ceph Arm Plate centerhole is lined up with Adjuster Base hole.

2) Before attaching PanX-C Collimator Assembly (4990-

420), place Collimator Thread Ring (4990-632) inside

collar ring and adjust screws to hold in neutral position,(Centered)

3) Remove Collimator Thread Ring from collar ring, butleave screws in set position.

4) Screw on Collimator Thread Ring (4990-632) to X-raytube head.

5) Ensure that brass thread from tube head protrudes 1 threadabout 1/16 from Clamp and set screws are at about 45

degree angle

6) Tighten set screws.

7) Place Collimator Track Top (4990-622) in neutral

position.




8) Place Collimator Assembly on Collimator Thread Ring.

9) Ensure Collimator Joint Bar is square to tube head and

side plate is parallel to tube head bottom.

10) Attach Collimator Core Clamp (4990-630) to side plates.

11) Tighten the 2 M4 screws on the Core clamp to secure theCollimator Assembly to tube head.

12) Remove Collimator Slide Plate

13) Install Tube Head Lock Bracket (4990-640). Do not

tighten cap screws.




14) Install Cam and Arm Assembly

15) Tighten Plunger until bottomed out on cam and then back

out 1 full turn.

16) Tighten Jam nut.

17) Place large phosphor screen in front of Pan Sensor. Havecenter of graph aligned with center of sensor active area.

18) Temporally tape the Pan Slide Plate Limit switch in the

active position.

19) Set PanX machine to Test Mode 10

20) Activate X-ray and align beam so that the top thin part iscentered on phosphor. Beam alignment is achieved by

rotating tube head and shifting the Tube Head Lock

Bracket.




21) Tighten M4 Cap screws on Tube Head Lock Bracket

when beam is aligned.

22) Place Slide Assembly (4990-524) in place and put into

Pan Position.

23) Adjust Collimator Track Top (4990-622) to center X-raybeam on phosphor.

24) Tighten 4 M4 Screws on Collimator Track Top.

25) Reset PanX Machine26) Rotate Tube head into Ceph position.

27) Slide Collimator into AP position.

28) Ensure PanX-C Collimator Cross Hair (4905-170) is in

place

29) Place Imager Cross Hair is in place.




30) Have a computer running DICOM set up to take Ceph

images.

31) Center hole of Collimator Cross Hair to be aligned with

Stand-off ring on imager Cross Hair.

32) With Adjustment Cam cap screws loose, adjust the left

and right of the Collimator Cross hair by rotating tube

head.

33) Tighten M4 cap screws when aligned.

34) With 6 M4 screws on Collimator Track Assembly loosethe height can be adjusted by the Collimator Ring

adjustment screws. (To move image down loosen top

screw and tighten bottom screw. To move image up,

loosen bottom screw and tighten top screw.)

35) Tighten the 6 M4 screws on the Collimator Track

Assembly




36) Tighten the 2 M4 side screws on the Collimator Ring.

37) Set Slide Plate to Pan

38) Have Dicom set up to take Pan images

39) Rotate Tube Head into Pan position.

40) Set PanX machine to Test Mode 9

41) Install Pan Collimator on Slide Plate.

42) With Steel filter in place take Pan Image

43) By examining Pan image, adjust Pan Collimator so that itis vertically straight and centered.

44) Tighten Pan Collimator screws.

45) Remove PanX-C Collimator Cross Hair and place PanX-C

Reducer Collimator on Slide Plate.

46) The Collimator Assembly is now aligned.

47) Adjust Rotation Selection Switches for both Pan and Cephon PanX-C Tube Head Lock Bracket.




48) Adjust 2 Stopping M4 Cap Screws on Tube Head Lock

Bracket.

Documents

Collimator Alignment Procedure _2