Calibration
1MAN0158-H11 04-2005 CSIP Level 1
CardioMD Service Manual
4-33
4.3
Detector Performance Tests
The verification procedures described in this section are to be performed in the field during instal-
lation, when directed by another procedure, or as part of normal maintenance.
4.3.1
Center of Rotation (COR) Analysis
4.3.1.1
Description
COR analysis is performed to test the center of rotation registration of the detector. A center of
rotation correction is used when reconstructing tomographic data to correct for minor misalign-
ment between the center of the image and the axis of rotation. Center of rotation (COR) correc-
tions are stored in a correction table and are applied as the data set is being acquired.
A COR correction is specific to a collimator. Therefore COR analysis should be performed for
each set of collimators.
Note
. It is necessary to acquire a COR correction for each collimator that is used for tomographic
scans.
4.3.1.2
Center of Rotation Analysis Procedure
To be performed:
After acquiring a COR correction.
Detector:
Extrinsic (should be performed for each set of collimators used
for SPECT acquisition).
Source: Specific
isotope
LEHR collimator
~ 40 MBq or 1mCi point source
LEGP collimator
~ 40 MBq or 1mCi point source
Total calibration time:
Approximately 15 minutes.
See the procedure in Chapter 5
Maintenance
of the CardioMD Operator’s Manual.
4.3.2
Flood Uniformity Test
4.3.2.1
Description
The flood uniformity test ensures that the uniformity of the camera field is sufficient to prevent
the introduction of artifacts into clinical studies. The test is performed intrinsically or extrinsically,
using either Tc-99m or Co-57. You must ensure that appropriate uniformity correction can be
applied. The most accurate check is performed intrinsically with an intrinsically acquired uniform-
ity correction table applied.
After acquisition of the QC check image, a uniformity calculation is performed to present uni-
formity figures as well as images for visual inspection.
4.3.2.2
Flood Uniformity Check Procedure
See the procedure in Chapter 5
Maintenance
of the CardioMD Operator’s Manual.
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: ......
