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| Estimation of radiation dose of workers in dealing with the lock of afterloading source |
| YU Hui, LI Ping, ZHANG Shuxu |
| Radiotherapy Center, Affiliated Cancer Hospital & Institute of Guangzhou Medical University, Guangzhou 510095 China |
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Abstract Objective To estimate the radiation dose of workers in dealing with the lock of the afterloading source.Methods Two phantoms were used to simulate the cervical cancer patient and the radiation worker, thermoluminescent dosimeters (TLD) were placed on surfaces of the phantom mimicked the worker in dealing with the lock of source, and the entrance surface doses (ESD) of the four radiosensitive organs (eye lens, thyroid, breast, gonald) were monitored.Results If the source strength was 370 GBq, the ESD of each OAR would be less than 0.12 mGy in whichever handling time and 1.7%~19.8% decrease after dressing the phantom with the radiation protective clothing.Conclusion In the case of source strength 370 GBq and the handling time 35 s, the ESD of therapist is less than 0.12 mGy without wearing the radiation protective clothing, which amount to the ESD of X ray radiographic examination only once.
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Received: 06 January 2019
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