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Objective To analyze the levels of entrance surface dose (ESD) to patients from diagnostic medical X-ray examinations in Inner Mongolia autonomous region.Methods The investigation of diagnostic medical X-ray examinations was completed in 30％ of the number of hospitals under the requirement of the program plan of the national survey on frequency and dose from medical exposure.The investigation of ESDs to patients from general diagnostic X-ray examinations was carried out in terms of the scale of annual outpatients in different levels of hospital.The difference in ESDs to patients was compared for different equipments,different grade hospitals and different exposure sites,with the comparison result being subjected to rank sum test.Results In all types of diagnostic medical X-ray equipment,DR photography equipment accounted for the majority.During various routine diagnostic X-ray examinations,the average ESDs was lumbar vertebral 3.39 mGy,pelvic and hip 1.65 mGy,cervical spine 0.90 mGy,extremities 0.38 mGy and thorax 0.37 mGy,respectively.In the diagnostic examinations of chest,lumbar and cervical spine,the ESDs caused by the use of screen film photography equipment were higher than those by DR photography equipment,with statistically significant difference (Z =-3.229,-4.820,-5.265,P＜0.05).Conclusions Screen film photography equipment results in higher ESD than DR photography equipment.The doctor's operation behavior is an important factor that affects the ESD.
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Objective@#To analyze the levels of entrance surface dose (ESD) to patients from diagnostic medical X-ray examinations in Inner Mongolia autonomous region.@*Methods@#The investigation of diagnostic medical X-ray examinations was completed in 30% of the number of hospitals under the requirement of the program plan of the national survey on frequency and dose from medical exposure. The investigation of ESDs to patients from general diagnostic X-ray examinations was carried out in terms of the scale of annual outpatients in different levels of hospital. The difference in ESDs to patients was compared for different equipments, different grade hospitals and different exposure sites, with the comparison result being subjected to rank sum test.@*Results@#In all types of diagnostic medical X-ray equipment, DR photography equipment accounted for the majority. During various routine diagnostic X-ray examinations, the average ESDs was lumbar vertebral 3.39 mGy, pelvic and hip 1.65 mGy, cervical spine 0.90 mGy, extremities 0.38 mGy and thorax 0.37 mGy, respectively. In the diagnostic examinations of chest, lumbar and cervical spine, the ESDs caused by the use of screen film photography equipment were higher than those by DR photography equipment, with statistically significant difference (Z=-3.229, -4.820, -5.265, P<0.05).@*Conclusions@#Screen film photography equipment results in higher ESD than DR photography equipment. The doctor′s operation behavior is an important factor that affects the ESD.
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Objective To study the frequencies of diagnostic exposure and distribution of examined patients in Jiangsu province and to evaluate the frequencies of commom diagnostic exposure and CT examination by investigating public hospitals in Jiangsu. Methods Public hospitals in 4 counties ( districts) were sampled, and the information of examined patients on sex, age, diagnostic type and exposure category were gathered through radiology information system ( RIS ) of the sampled hospitals. Results A total of 728196 records of diagnostic procedures were gathered from the sampled hospitals. Among them 479024 records were on common diagnostic procedures, whereas 249172 records were on CT diagnostic procedures. The sex ratio was relatively balanced. the above 40 years of age group amounted for 62% the highest proportion, among the three age groups. The diagnostic frequencies in level Ⅱ hospitals contributed the highest proportion although 70% of the sampled hospitals were level I hospitals. Such diagnostic procedures as barium enema and mammography were highly distributed in level Ⅲ hospitals. Diagnostic frequencies were estimated in 2015 at 303 common diagnostic examinations and 173 CT diagnostic procedures per 1000 persons in Jiangsu province. Conclusions Frequencies of diagnostic radiology in Jiangsu became increased since the last investigation of medical exposure examinations during the Ninth Five-year Plan, which was a challenge for health care. It is important to mobilize more resources in protection against medical radiation exposure.
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Objective To study the frequencies of diagnostic exposure and distribution of examined patients in Jiangsu province and to evaluate the frequencies of commom diagnostic exposure and CT examination by investigating public hospitals in Jiangsu. Methods Public hospitals in 4 counties ( districts) were sampled, and the information of examined patients on sex, age, diagnostic type and exposure category were gathered through radiology information system ( RIS ) of the sampled hospitals. Results A total of 728196 records of diagnostic procedures were gathered from the sampled hospitals. Among them 479024 records were on common diagnostic procedures, whereas 249172 records were on CT diagnostic procedures. The sex ratio was relatively balanced. the above 40 years of age group amounted for 62% the highest proportion, among the three age groups. The diagnostic frequencies in level Ⅱ hospitals contributed the highest proportion although 70% of the sampled hospitals were level I hospitals. Such diagnostic procedures as barium enema and mammography were highly distributed in level Ⅲ hospitals. Diagnostic frequencies were estimated in 2015 at 303 common diagnostic examinations and 173 CT diagnostic procedures per 1000 persons in Jiangsu province. Conclusions Frequencies of diagnostic radiology in Jiangsu became increased since the last investigation of medical exposure examinations during the Ninth Five-year Plan, which was a challenge for health care. It is important to mobilize more resources in protection against medical radiation exposure.