Study on dose rate distribution inside diagnostic X-ray room by using MCNP5 code
Trương Thị Hồng LoanT NguyenHien Thi DoanKhanh Ai TranDung Thi Thuy VoPhuong Nguyen DangPhe My ThaiSon Thai LoXuan T. LeTruc Thi Quynh PhamTuan Anh Nguyen
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Abstract:
In this paper, the scattering influence on image quality and radiation safety because of changing room size was studied. To estimate the radiation safety in X-ray room, the exact determination of dose rate distribution inside the room and absorbed dose rate for patient is the first task. The authors simulated the dose rate distribution inside diagnostic X-ray room at Nhi Dong hospital with using MCNP5 code. The dependence of dose rate distribution on various peak voltages of X-ray tube was also investigated in this studyKeywords:
Dose rate
X-ray tube
Code (set theory)
Objective To study CR in the correct exposure condition,ensure the cases,image quality reduce a patient radiation dose.Methods Use konica 170 CR system,choose three parts,60 patients,KVP and mAs respectively by different exposure,the value analysis image quality Results Appropiate high KVP radiography exposure about 3.57-5.00 time,image quality there is no obvious differences.Conclusion CR high KVP photography reduces the X-ray exposure,reduced the patient radiation dose.
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A substantial increase in computed tomography (CT) scanning with availability of state-of-the-art multidetector-row CT scanners has generated debate about its safety and considerable interest in formulating clinical and technologic strategies to reduce radiation exposure. This review describes the magnitude of radiation exposure associated with CT scanning and projected radiation risks as well as clinical strategies and major technologic innovations for reducing radiation dose to patients undergoing CT scanning.
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Dose rate
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Dose rate
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Dose rate
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BiCMOS
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Table (database)
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Absorbed dose was measured in clinical X-ray examinations using TLD. Moreover, we distributed the levels of radiation exposure into 3 classes. The presumed dose of the internal organs, e. g., uterus dose, was computed to depth doses with a surface dose. This information provides a prediction of the influence of radiation, and the examination can be performed with te informed consent of the patient. Moreover, we examined the distribution of the level of absorbed dose. We proposed two kinds of radiation exposure level, one to the fetus in a pregnant woman and a general level of radiation exposure that is not applied to pregnant women. The levels were as follows : 0.5 mGy and 100 mGy were considered the boundaries for fetal radiation exposure in a pregnant woman, and 200 mGy and 3 Gy were considered the boundaries for the general level of radiation exposure (excluding pregnant women).
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Dose area product
Medical radiation
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