| Wei Zongyuan,Zhang Qixin,Zong Xiyuan.Studies on optimization of radiation Protection for patients in diagnostic radiology[J].Chinese Journal of Radiological Medicine and Protection,1995,15(6):387-392 |
| Studies on optimization of radiation Protection for patients in diagnostic radiology |
| Received:December 26, 1994 Revised:March 08, 1995 |
| DOI： |
| KeyWords:Diagnostic radiology optimization radiation protection patient dose |
| FundProject:国际原子能机构资助 |
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| Abstract:: |
| For the exposure of patients in diagnostic radiology, individual dose limit does not apply, but optimization of radiological protection may play a major role.This project has been carried out on purpose to improve the protection of patients in medical diagnostic radiology in China,utilizing the principle of optimization.Taking Sichuan, Shandong and Beijing of China as surveyed areas,we investigated the present situation of protection of patients.In the survey.the patient dose was classified into practical dose,justified dose and optimized dose to evaluate the influences of managerial and equipment factors separately.The results show that there are some urgent protection problems in Xray protection in surveyed regions to be solved.This paper, however,points out that the prospects of reducing patient dose are encouraging provided that appropriate measures are adopted.For instance,taking proper managerial measures without radical change of existing equipment may reduce the patient dose in chest fluoroscopy and radiography by 40% and 18%, and refitting some equipment may reduce the dose respectively by 82.4% in chest fluoroscopy, 66% in chest radiography,and 80% in barium meal examination of gastrointestinal tract.Using chest radiography instead of fluoroscopy supplemented by other protective measures may reduce the dose by 91.7%.Optimization analysis shows that adoption of the above measures conforms to the principle of optimization of radiation protection .1.Laboratory of Industrial Hygiene,Ministry of Health,Beijing 100088,China;2.Institute of Radiation Medicine,Shandong Academy of Medical Sciences,Jinan 250001,China;3.Sichuan Institute of Radiation Health Protection,Chengdu 610041. China; 4.Beijing Institute of Radiation Health Protection,Beijing 100013, China. |
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