Detector Calibration
4-30
CardioMD Service Manual
1MAN0158-H11 04-2005 CSIP Level 1
4.2.9
Center of Rotation (COR) Calibration
4.2.9.1
Description
A center of rotation correction is used when reconstructing tomographic data to correct for minor
misalignment between the center of the image and the axis of rotation. Center of rotation (COR)
corrections are stored in a correction table and will be applied automatically after a data set has
been acquired.
COR correction is collimator specific. It is necessary to acquire a COR correction for each set of
collimators used for tomographic scans.
4.2.9.2
Center of Rotation Calibration Procedure
To be performed:
When the EDC board, a PMT tube, X-E strip, Y strip or crystal is
replaced.
Detector:
Extrinsic (should be performed for each set of collimators used
for SPECT acquisition).
Source: Specific
isotope
LEHR collimator
40–120 MBq or 1–3 mCi point source
LEGP collimator
40–120 MBq or 1–3 mCi point source
Total calibration time:
Approximately 20 minutes
Calibration file created:
C:/Cardiocam/calibrations/CORcor/CORcor.coll-X
where X represents the assigned collimator number:
0 = LEGP
1 = LEHR.
Note
. Before the COR acquisition is started, the system identifies the type of the collimator
mounted on the detector. This enables the system to store the acquired COR corrections for a spe-
cific collimator under the matching file name.
Note
. If a correction table for the type of collimators already exists, the system automatically
overwrites the old table immediately after the new correction table has been acquired.
Procedure Details
1.
Verify that the collimators, for which the
COR correction is to be acquired, are
mounted on the detectors.
2.
Ensure that the CardioMD system is in the
patient load position.
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: ......