Spatial Linearity Correction Calibration (Lincor); Description; Spatial Linearity Correction Calibration Procedure - Philips CARDIOMD Service Manual

Detector Calibration
Procedure
When the ECor calibration is complete, this
message appears.
17. Click OK to close the message box.
18. Repeat the procedure to calibrate the other
detector, or
19. Click Exit to close the ECor page.
4.2.7

Spatial Linearity Correction Calibration (LinCor)

4.2.7.1

Description

Linearity correction is a spatially related linearity correction. The map is generated based on im-
ages of phantoms with slit patterns, one for the X direction and one for the Y direction. From
those images, deviations from an "ideal" slit pattern are calculated and a map with correction fac-
tors is generated. Once generated, each address in the map will contain a correction factor that is
applied to the position signals during acquisition.
Note. LinCor must be preceded by HV, PMT, ECal, GeoCal and ECor calibration.
Note. If the CardioMD system is equipped with the AC Option, the transmission scanners must be
removed before spatial linearity correction calibration can be performed. See Chapter 12 Car-
dioMD AC Option for instructions.
4.2.7.2

Spatial Linearity Correction Calibration Procedure

To be performed:
Detector:
Source:
Total calibration time:
Calibration file created:
Procedure
1. Remove the collimators 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.
4-22 CardioMD Service Manual
Details
When the EDC board, a PMT tube, X-E board, Y board or
crystal is replaced.
One detector at a time, X and Y spatial masks (part of ser-
vice calibration kit).
Tc-99m or Co-57 ~ 120 – 200 MBq or 3-5 mCi.
Approximately 90 minutes per detector.
C:/Cardiocam/calibrations/lincor.det1
respectively.
Details
and
det2
1MAN0158-H11 04-2005 CSIP Level 1