Philips CARDIOMD Service Manual page 80

Detector Calibration
Procedure
15. Place the point source holder at a mini-
mum distance of approximately 1.85 me-
ters (6 ft.) from the detector to be cali-
brated.
16. Place a Tc-99m or Co-57 point source of
approximately 160 – 200 MBq or 4 – 5
mCi in the holder.
17. Ensure that the source is placed precisely
in front of the center of the detector FOV.
18. Verify that the count rate is < 40 kcps and
that slits are displayed vertically in the im-
age window.
19. Click Start.
After a few million counts, check that all the
slits in the phantom are clearly resolved. The
purpose is to make sure that a defective table
is not causing neighbor tubes to "pull" counts
and distort linearity.
When the calibration in the X-direction is
done, this message pops up.
Note. Do not click OK at this point.
20. Remove the point source.
Note. The source must be removed to avoid
saturating the open detector.
21. Swap phantom from X to Y.
22. Put the source back in place.
23. Click OK in the message box.
4-24 CardioMD Service Manual
Details
185 +/- 3 cm
Slits
185 +/- 3 cm
Y-linearity phantom
1MAN0158-H11 04-2005 CSIP Level 1