Philips CARDIOMD Service Manual page 333

Procedure
7. Place the point source holder at a mini-
mum distance of approximately 1.85 me-
ters from the detector.
8. Place a ~ 200–500 µCi (7–20MBq) Tc-
99m point source yielding 20 kcps or less
in the holder.
Note. Make sure that the position of the source holder is aligned with the center of the detector
FOV. It is important that the entire detector FOV is exposed to the source.
Procedure
9. Make sure that the entire detector FOV is
exposed to the source and that the count
rate is < 20 kcps.
10. Click Start.
When the test is complete, the result is shown
in a pop-up window.
11. Note both the Fwhm and the Energy peak
result. Click OK to remove the pop-up.
The energy resolution specification is ≤ 9.4%.
12. Remove the Tc-99m source and place a ~
200–500 µCi (7–20MBq) Co-57 point
source yielding 20 kcps or less in the
holder.
13. On the Energy resolution page, enter 122.1
in the Energy field for Co-57.
14. Click Start.
When the test is complete, the result is shown
in a pop-up window.
15. Note the Fwhm and the Energy peak re-
sult. Click OK to remove the pop-up.
Now calculate the NEMA Energy resolution
result:
16. Subtract the Energy peak result for Co-57
from the Energy peak result for Tc-99m.
Divide the result by 18.4 to get a correc-
tion figure.
17. Divide the Fwhm result for Tc-99m by the
correction figure to get the true NEMA re-
1MAN0158-H11 04-2005 CSIP Level 1
Details
185 +/- 3 cm
Details
8.8%
NEMA Performance Measurement
185 +/- 3 cm
CardioMD Service Manual 10-5