Objective To analyze bedside radiation dose rates for interventional surgery operators in Guangdong Province, examine dose distribution patterns, and identify potential weaknesses in radiation protection, and to provide guidance for optimizing radiation monitoring and protection measures. Methods A total of 209 digital subtraction angiography devices measured in Guangdong Province between 2017 and 2024 were used as the research objects. The first and second operator positions were set at 30 cm and 90 cm horizontally from the X-ray tube focal point, respectively. Monitoring points were set up at 155, 125, 105, 80, and 20 cm above the ground. Results The median bedside radiation dose rate for interventional surgery operators in Guangdong Province was 83.0 (3.9, 1044.0) μSv/h, indicating instances of exceeding standard limits. The overall dose rates under the old and new standards were 29.8 (3.9-346.5) μSv/h and 114.0 (4.0-1044.0) μSv/h respectively. Results for both standards showed a higher dose rate at the second than the first operator position. The dose rates at the heights of 105 cm (abdomen), 125 cm (chest), and 155 cm (head) were higher in the second operator position than in the first operator position. Additionally, 71.5% and 56.8% of the highest dose rate points under the new and old standards, respectively, were concentrated at 105 cm (abdomen), 125 cm (chest) and 155 cm (head) in the second operator position. Conclusion The principle of protection optimization should be followed, auxiliary protective facilities should be placed correctly, and attention should be paid to the protection of the second surgery operator position, especially above the abdomen. The dose rate results under the new standard were lower than those under the old standard, suggesting that the measurement method may overestimate radiation exposure at the secondary operator position.

New quality productivity is a strategic engine for promoting high-quality development and is an inherent requirement and important focus for enhancing new driving forces and building national advantages.The cultivation of innovative talents and technological innovation are key to the development of new quality productivity.Laboratory animal science is a comprehensive interdisciplinary subject that integrates multiple disciplines including biology,medicine,pharmacy,and biomedical engineering.Teaching and research of laboratory animal science not only promotes the creation of innovative talent teams by cultivating innovative consciousness,thinking,spirit,and operational abilities,but also promotes the development of cutting-edge technologies and the transformation of disruptive research result in the fields of basic research and clinical translation of biomedicine,thus providing important guarantees for China's scientific and technological progress and innovative development.

New quality productivity is a strategic engine for promoting high-quality development and is an inherent requirement and important focus for enhancing new driving forces and building national advantages.The cultivation of innovative talents and technological innovation are key to the development of new quality productivity.Laboratory animal science is a comprehensive interdisciplinary subject that integrates multiple disciplines including biology,medicine,pharmacy,and biomedical engineering.Teaching and research of laboratory animal science not only promotes the creation of innovative talent teams by cultivating innovative consciousness,thinking,spirit,and operational abilities,but also promotes the development of cutting-edge technologies and the transformation of disruptive research result in the fields of basic research and clinical translation of biomedicine,thus providing important guarantees for China's scientific and technological progress and innovative development.

【Objective】 To analyze the correlation between platelet distribution width (PDW) and hyperuricemia (HUA). 【Methods】 For this study we recruited 4 885 teaching and administrative staff of Xi’an Jiaotong University who took the physical examination in 2020 and met the requirements. The basic information, blood routine and serum biochemical index results were collected and analyzed retrospectively. Data were sorted by gender, and the serum UA level and the prevalence of HUA in different PDW quartiles were compared after dividing PDW into quartiles. The association of PDW with other indexes including age, serum biochemical indexes and blood routine indexes was analyzed. Then, the factors related to HUA in different genders were analyzed, and the independent influence of PDW on HUA was further analyzed. 【Results】 The serum UA level and prevalence of HUA were on the increase among different PDW quartiles both in two genders, and PDW level was positively correlated with serum UA level (P<0.05). In addition, PDW was correlated with age, fasting blood glucose, indicators related to liver and kidney function, and certain indexes of blood lipid and blood routine tests. Among the above indicators, glutamic-pyruvic transaminase, glutamic oxalacetic transaminase, creatinine, urea, white blood cell count, hematocrit, and blood lipid were all significantly associated with HUA in both genders (P<0.05). In addition, HUA significantly associated with platelet count in males (P<0.05), but with age, fasting blood glucose, hemoglobin, red blood cell distribution width, and PDW in females (P<0.05). After excluding the above confounding factors, the risk of HUA in males with high levels of PDW was still significantly increased (P<0.05), but there was no significant difference in females (P>0.05). 【Conclusion】 PDW is correlated with HUA, and PDW may be an independent risk factor for HUA in males. However, further study is needed.

Objective To obtain the information on the frequency of diagnostic X-ray examinations in Guangdong province in order to provide reference data for the rational application of diagnostic radiology.Methods A typical stratified sampling method was used to select 56 medical institutions in 7 districts in Guangdong province for the survey of the frequencies of diagnostic X-ray examinations.Multiple linear regression analysis was performed using the relevant variables of the surveyed sample (total number of hospitals,number of outpatients,number of inpatients,number of radiation workers,and number of diagnostic equipment).The dependent independent variables were fitted to the linear regression equation to estimate the frequency of routine diagnostic X-ray examinations and diagnostic CT examinations and the total frequency of diagnostic medical X-ray examinations in Guangdong province in 2016.Results By the largest percentage contribution,chest radiography accounted for 60.84％ of the routine diagnostic X-ray examinations,brain scans 28.03％ of diagnostic CT examinations,and cardiovascular interventions 48.83％ of interventional radiology.For the group of above 40 years old,the largest percentage contributions were,respectively,routine diagnostic X-ray examination 47.95％,diagnostic CT examinations 65.41％,and interventional radiology 75.64％.All types of medical X-ray examinations are concentrated in the tertiary and secondary hospitals.Based on this survey,the examination frequencies for 2016 in Guangdong were estimated to be,respectively,diagnostic X-ray examination 699 examinations per 1 000 population and CT diagnostic 231 examinations per 1 000 population,with the total of 992 examinations per 1 000 population.Conclusions This survey was completed to a limited degree and less investment.The results showed that the diagnostic radiology in Guangdong province is developing with increased frequencies,with wide varieties of X-ray examination types in the tertiary and secondary hospitals.Relevant competent defpartments should pay attention to strengthening the radiation protection of examined individuals and actively providing guidance on the correct and rational applicc ation of diagnostic radiology so as to achieve profit and avoid disadvantages.