[en] This paper reports the annual dose levels of 3124 radiation workers in Shanxi province measured by thermoluminescense dosimetry. the minimum annual level is 0.2 mGy and the maximum is 70 mGy, with an average of 1.79 mGy. The annual dose levels for persons engaged in different occupations such as medical radiodiagnostic workers, nuclear medicine, and radiotherapy personnel, industrial radiographers, geological survey workers, teaching and research workers and others are 1.95 mGy, 1.15 mGy, 0.91 mGy, 2.11 mGy, 1.76 mGy, 0.65 mGy, and 1.14 mGy, respectively. Of the 3124 investigated radiation workers 95.9 per cent received an annual dose below three tenths of the annual dose limit of 50 mGy and 89.8% had a dose below one tenth of that limit

[en] Pursuant to the relevant national standards, a survey was made by the Hygienic Supervision Bureau of Shanxi Province for the protection performance of 28 ⁶⁰Co radiotherapy units and 21 medical accelerators in 39 medical units in Shanxi, together with monitoring and assessment being conducted of their protection equipment. The result shows a good protection performance in general, especially the medical electron accelerator superior to ⁶⁰Co machine in protection performance in accordance with the national standards. (authors)

[en] In order to provide quality control of radiation dosimetry for radiation protection, a dosimetry laboratory was established in our Institute. Periodical calibration of radiation monitoring instruments and intercomparisons of personnel dosimetry were carried in the realm of x-ray protection monitoring, and survey of doses and effects in medical exposures and in roentgenological workers. In this paper the basic instrumentation and methods utilized by the laboratory, and the results of the first intercomparison of thermoluminescent personnel dosimetry and the first calibration of dose meters used in radiation protection monitoring are presented. (author)

[en] The author presents investigation results of individual external dose of radiation workers in Shanxi, 1987∼1995. LiF(Mg, Cu, P) TLDs were adopted in monitoring and the TLD monitoring results were used for individual effective doses assessment. The results indicated that annual average effective dose was 1.93 mSv for the 12494 person-year monitored from 1987 to 1995, the annual average effective dose decreased from 3.49 mSv for 1987 to 1.80 mSv for 1995. As an example, the monitoring results in 1990 indicated that annual average effective dose was 1.79 mSv averaged over 3124 individuals monitored among 5577 radiation workers in the year, annual collective effective dose, S, was 5.59 man·Sv, the number of individuals who received effective dose greater than 15 mSv, N(>15), was 68 and the ratio of their collective effective dose, S(>15), to the total annual collective effective dose, S, was SR₁₅ =3D S(>15)/S =3D 0.33. Among them, 10 individuals received dose greater than the dose limit (50 mSv), accounting for about 0.3% of the monitored individuals. In 1990, X radiodiagnosis, nuclear medicine, radiotherapy, industrial radioscopy, geological exploration, teaching and scientific research, and other radiation workers received effective doses 1.95, 1.17, 0.92, 2.13, 1.73, 0.64 and 1.15 mSv, respectively. Comparison with those of other provinces and recommendations for improving radiation protection were made

[en] 1340 examinees were random sampled in 56 hospitals of different kinds in Beijing and thier surface exposures were measured by using LiF (Mg, Cu, P) thermoluminescent dosimeters. The results of these exposures for 22 kinds of radiographic examination are presented in this paper

[en] Both image quality and health protection performance of 120 medicial CT machine across Shanxi province were tested and reviewed, with the used methods and gained results shown in this paper. Such certificated parameters of those equipment as space resolutin ratio, low contrast resolution ratio, dose index, CT value of water, degree of consistency, layer thickness derivation, posioning accuracy and bed displacement acurracy are lOO%, 99%, 91%, 94%, 94%, 93%, 95% and 97% respectively. (authors)