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Accuracy of Center of Rotation Determination for SPECT Imaging. Peter W. Blue Nuclear Medicine Service, Fitzsimons Army Medical Center, Aurora, Colorado The center of rotation (COR) determination used in a commercially available software package for SPECT imaging is shown to be significantly inaccurate.
Test or calibrate COR (center of rotation) corrections at least monthly • Follow manufacturer’s recommendations and instructions for testing/calibration procedures
Quality improvement in the nuclear medicine laboratory can po-tentially reduce the number of studies that need to be repeated because of poor quality, increase diagnostic accuracy, reduce radiation exposure, increase patient satisfaction, and save resources.
1 maj 2016 · Objectives Center of rotation (COR) correction is a calibration and quality control procedure performed and applied to align gamma camera image centers to the gantry’s physical center of rotation. Values obtained from the calibration are used to correct clinically acquired SPECT projections prior to reconstruction.
SPECT Center-of-Rotation The center of the gamma camera in all acquired images must be known
3.5. Centre of rotation: Calibration test performs semi-annually to ensure that the camera image exactly matching the centre of the computer image when the images are reconstructed. 99mTc point sources can be used near the axis of rotation. Figure 4. point source at the centre (left), COR test (right) 4. Conclusion
This article reviews routine quality-control (QC) procedures for current nuclear medicine instrumentation, including the survey meter, dose calibrator, well counter, intraoperative probe, organ (“thyroid”) uptake probe, γ-camera, SPECT and SPECT/CT scanner, and PET and PET/CT scanner.
