Liu Qian,Yang Shuhui,Song Gang,Min Nan,Liu Fang,Niu Fei,Chen Rui,Chen Yingmin.Survey on frequency of medical X-ray diagnosis in Shandong province[J].Chinese Journal of Radiological Medicine and Protection,2019,39(5):363-369
Survey on frequency of medical X-ray diagnosis in Shandong province
Received:March 13, 2019  
DOI:10.3760/cma.j.issn.0254-5098.2019.05.008
KeyWords:X-ray diagnostic imaging  Frequency  Medical exposure
FundProject:山东省自然科学基金项目(ZR2017YL006);山东省2018年重点研发计划(2018GSF118164)
Author NameAffiliationE-mail
Liu Qian Institute of Radiation Medicine, Shandong Academy of Medical Sciences, Jinan 260062, China  
Yang Shuhui Institute of Radiation Medicine, Shandong Academy of Medical Sciences, Jinan 260062, China  
Song Gang Institute of Radiation Medicine, Shandong Academy of Medical Sciences, Jinan 260062, China  
Min Nan Institute of Radiation Medicine, Shandong Academy of Medical Sciences, Jinan 260062, China  
Liu Fang Institute of Radiation Medicine, Shandong Academy of Medical Sciences, Jinan 260062, China  
Niu Fei Institute of Radiation Medicine, Shandong Academy of Medical Sciences, Jinan 260062, China  
Chen Rui Institute of Radiation Medicine, Shandong Academy of Medical Sciences, Jinan 260062, China  
Chen Yingmin Institute of Radiation Medicine, Shandong Academy of Medical Sciences, Jinan 260062, China ying2012min@163.com 
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Abstract::
      Objective To analyze the distribution characteristics and influencing factors of X-ray diagnostic imaging in Shandong province, and to estimate the application frequency of X-ray diagnostic imaging in the province, and provide data support for X-ray equipment. Methods A random sampling method was used to extract 32 medical institutions as respondents from 10 prefecture-level cities in Shandong province. The basic information of medical institutions and the age, sex, examination and procedure of the subjects were analyzed. The distribution of the X-ray application was analyzed and estimated by using a multiple linear regression model. Results Totally 14 694 085 subjects were surveyed, and the proportion of male and female in the sample was not completely uniform. A total of 2 099 155 X-ray diagnostic information was collected in 2016, and the frequency of conventional radiography was the highest, accounting for 59.49%. The next was CT examination, accounting for 28.34%. The frequency of the two examinations showed an increasing trend with the age of subjects. For the total frequency of conventional diagnostic radiography and CT examination, the tertiary hospitals accounted for the highest proportion of the total, up to 52.13%, while the secondary hospitals accounted for the relatively low proportion of 30.09%, and the primary hospitals the lowest with 17.77%. The chest radiography had the highest proportion in conventional radiography accounting for 32.79% of the total frequency of X-ray diagnostic imaging, and the head procedure had the highest proportion in CT examination, accounting for 10.07% of the total frequency of X-ray diagnostic imaging. The fluoroscopy, mammography and dental radiography were mainly concentrated in the tertiary hospitals, and the primary hospitals had mainly radiography. Multiple linear regression models showed that the frequency of application of conventional X-ray diagnostic imaging(including radiography, fluoroscopy, dental radiography and mammography) was positively correlated with equipment quantity, number of outpatient and emergency patients, and tertiary hospitals (t=4.334, 3.615, 2.339,P<0.05). CT examination was positively correlated with equipment quantity and the number of inpatient (t=2.167, 2.595,P<0.05). The frequency of conventional X-ray diagnostic imaging and CT examination in Shandong province were estimated about 491.17 examinations per 1 000 population and 258.17 examinations per 1 000 population respectively. Conclusions The frequency of X-ray exposure in Shandong province increased significantly compared with that during the "9th Five-Year Plan" period. All relevant departments should take effective measures to strengthen medical radiation protection and reduce radiation risk.
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