Captus 3000 Thyroid Uptake System
My new Captus 3000 system has a large accuracy deviation, what is the problem?
All systems are carefully tested using sources before shipment to a customer. Each customer uses a different dedicated check source. Before using your new system, enter the calibration date and activity of your source and re-measure the efficiency. The check source information must be entered in two locations, once for the constancy test and once for the Chi-Square test. Efficiencies must be measured for each detector, well and probe. Follow up by performing the QC tests.
My Captus 3000 deviation exceeds 5% on the uptake probe, what is the problem?
The well accuracy is fine. The check source may not be in the same position as it was during the initial calibration. When measuring a check source in the uptake probe, turn the collimator upwards facing the ceiling and gently place the rod source in the center of the probe. If the source is off center, the lead shielding will attenuate some of the activity.
I cannot find my Captus 3000 manual.
All new systems now have the Owner’s Manual added to the PC. Just click the Captus 3000 Manual icon on your screen.
I made a counting error during a thyroid uptake procedure, is there a way to continue the measurement?
The Captus 3000 includes a 1024 channel fully functional MCA module. Any counting procedure can be performed manually using the MCA. Setup a defined ROI around the region of interest and measure the background and all samples. Manually subtract the background and perform calculations.