Abstract：Objective To explore the application of OriQA equipment in the daily detection of post-mounted therapy equipment,
to offer data support for measurement accuracy and stability of the equipment. Methods After the initial calibration of the OriQA
equipment and independent calibration of the radioactive source activity, source placement accuracy and residence time accuracy,
repeated measurements were carried out on a daily basis for the quality assurance (QA) plan (QA plan contains 4 resident locations,
each with an initial residence time of 2 s). A total of 37 daily inspection data were gathered from August to October in 2022, and
the measurement results of radioactive source arrival, residence time and radioactive source activity were analyzed. Results
The deviation of the radioactive source calibration of the OriQA device was less than 0.3% compared with the well-type ionization
chamber measurement result, less than 0.2 mm compared with the ruler measurement, and less than 0.3 s compared with the
stopwatch timing result. The stability test results showed that the radioactive source activity deviation was 2.18%±1.33%. As the
decay continued, the measurement deviation increased, and the maximum deviation was 4.52%. The dwell positions in the QA plan
were 1150, 1160, 1170 and 1180 mm, respectively, and the measurement results were (1149.9±0.3), (1159.9±0.4), (1170.0±0.4)
and (1180.3±0.5) mm, respectively. For all dwell positions, the absolute error of dwell time was (0.06±0.05) s, and the measurement
results of each dwell position were in good agreement. Conclusion The OriQA equipment can be used as a detection method for
high-quality post-loading machine radioactive source in place, residence time accuracy and radioactive source activity. The postloading
accuracy of the experimental test meets the requirements of clinical use and can be widely used in the quality control of each
post-loading machine.
罗春丽，张杰，杨志伟，孙玉亮，孙显松，于浪. OriQA设备在后装治疗机质量
保证中的应用分析[J]. 中国医疗设备, 2023, 38(10): 51-55.
LUO Chunli, ZHANG Jie, YANG Zhiwei, SUN Yuliang, SUN Xiansong, YU Lang. Application of OriQA Equipment in Quality Assurance of After
Loading the Rapeutic Machine. China Medical Devices, 2023, 38(10): 51-55.
