Detector Calibration
4-20 CardioMD Service Manual 1MAN0158-H11 04-2005 CSIP Level 1
Procedure Details
17. Click Exit to close the GeoCal page.
4.2.6 Energy Correction Calibration (ECor)
4.2.6.1 Description
Energy correction is a spatially related energy correction map. The map is generated based on
relative count rate information in two energy windows, one on each side of the chosen isotope
peak. The map generation is an iterative process typically consisting of 3-5 iterations.
Once generated, each address in the map will contain a correction factor that is applied to the en-
ergy signal during acquisitions.
Note. ECor must be preceded by HV, PMT, ECal and GeoCal calibration.
Note. If the CardioMD system is equipped with the AC Option, the transmission scanners must be
removed before Energy correction calibration can be performed. See Chapter 12 CardioMD AC
Option for instructions.
4.2.6.2 Energy Correction Procedure
To be performed: When the EDC board, PMT tube, X-E board, Y board or
crystal is replaced.
Detector: One detector at a time, intrinsic.
Source: Tc-99m or Co-57 ~ 40 MBq or 1 mCi in the source holder.
Total calibration time: Approximately 30 minutes per detector.
Calibration file created:
C:/Cardiocam/calibrations/ecor.det1 and det2
respectively.
Procedure Details
1. Remove the collimator from the detector
to be calibrated. See the Operator’s Man-
ual for instructions.
2. Ensure that the CardioMD system is in the
patient load position.
3. On the Persistence page, click the Tools
button.
4. When the Calibration & Configuration
menu appears, click Service.
5. If prompted, enter the service password
(see page 4-9 for instructions).
6. In the Service Calibrations menu, click
ECor.
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