Objective To analyze quality control of a thermoluminescence detection system (TDS) in the investigation of patients' entrance surface doses (ESD) so as to improve the reliability of the measurement.
Methods Standard curve of thermoluminescence dosimeters (TLDs) used in the investigation and dose comparison of blinded radiation samples were performed in a secondary standard dosimetry laboratory. Standardized measuring procedures and regular equipment calibration were adopted to control the monitoring quality of the TDS.
Results The differences between the detected blinded samples' values and true values were less than& #177;10%. Three standard curves presented good linearity (the correlations coefficients were 0.999 8, 0.999 6, and 0.999 9, respectively).
Conclusion The quality control of the TDS is in line with the requirements of relevant national standards. The monitoring results are accurate and reliable, and therefore can guarantee the patients' ESD investigation.
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