NEMA Performance Measurement
1MAN0158-H11 04-2005 CSIP Level 1
CardioMD Service Manual
10-5
Procedure Details
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
µ
Ci (7–20MBq) Tc-
99m point source yielding 20 kcps or less
in the holder.
1
2
75
+
/-
3 c
m
185 +/- 3 cm
1
2
75
+
/- 2 c
m
185 +/- 3 cm
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 Details
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%.
8.8%
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-
Summary of Contents for CARDIOMD
Page 1: ...CARDIOMD SERVICE MANUAL 1MAN0158 H11 04 2005 CSIP Level 1 ...
Page 10: ...Introduction x CardioMD Service Manual 1MAN0158 H11 04 2005 CSIP Level 1 ...
Page 16: ...Safe Operating Practices 1 6 CardioMD Service Manual 1MAN0158 H11 04 2005 CSIP Level 1 ...
Page 164: ...Detector Calibration Files 5 60 CardioMD Service Manual 1MAN0158 H11 04 2005 CSIP Level 1 ...
Page 328: ...Installation Procedures 9 38 CardioMD Service Manual 1MAN0158 H11 04 2005 CSIP Level 1 ...
Page 348: ...Planned Maintenance Procedures 11 6 CardioMD Service Manual 1MAN0158 H11 04 2005 CSIP Level 1 ...
Page 465: ......