Uniformity Calibration (Unifcor); Description; Uniformity Calibration Procedure - Philips CARDIOMD Service Manual

Procedure
The system proceeds to acquire Y linearity
data.
24. After a few million counts, check that all
slits in the phantom are clearly resolved.
When the detector has been calibrated in both
the X and Y direction, this message pops up.
25. Remove the source to avoid saturating the
open detector.
26. Click OK.
27. Repeat the procedure to calibrate the other
detector, or
28. Click Exit to close the LinCor page.
4.2.8

Uniformity Calibration (UnifCor)

4.2.8.1

Description

The uniformity of the scintillation crystal in the detector depends on the energy of the isotope
used, and the collimators may have minor variations in sensitivity. To compensate for non-
uniformity, CardioMD requires uniformity calibration.
The flexible scheme of uniformity correction supported by CardioMD enables the user to acquire
both intrinsic and extrinsic uniformity correction tables. Uniformity correction tables can be ac-
quired at any isotope peak (or combinations with multiple peaks) and with specific energy win-
dows to match the setup for clinical applications exactly.
4.2.8.2

Uniformity Calibration Procedure

To be performed:
Detector:
Source:
Total calibration time:
1MAN0158-H11 04-2005 CSIP Level 1
Details
Slits
When the detector has been re-calibrated or when intrinsic
uniformity is out of spec (2.5 % integral and 1.5 % differen-
tial).
One detector at the time, intrinsic or extrinsic.
Note. FOV mask is used for intrinsic calibrations
Specific isotope ~ 40 MBq or 1 mCi (intrinsic),
~ 120 – 200 MBq or 3 – 5 mCi (extrinsic).
Approximately 20 minutes per detector.
Calibration
CardioMD Service Manual 4-25