• Proceedings of the Korean Society of Radiological Science
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• 1997.05a
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• pp.95.2-95.2
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• 1997

• Journal of The Korean Radiological Technologist Association
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• v.29 no.1
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• pp.264-264
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• 2003

• Journal of Radiation Protection and Research
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• v.30 no.4
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• pp.185-196
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• 2005

Although medical exposure from diagnostic radiology procedures such as conventional x-rays, CT and PET scans is necessary for healthcare purposes, understanding its characteristics and size of the resulting radiation dose to patients is much of worth because medical radiation constitutes the largest artificial source of exposure and the medical exposure is in a trend of fast increasing particularly in the developed society. Annual collective doses and per-caput effective doses from different radiology procedures in Korea were estimated by combining the effective dose estimates per single medical procedure and the health insurance statistics in 2002. Values of the effective dose per single procedure were compiled from different sources including NRPB reports, ICRP 80, MIRDOSE3.1 code and independent computations of the authors. The annual collective dose reaches 27440 man-Sv (diagnostic radiology: 22880 man-Sv, nuclear medicine: 4560 man-Sv) which is reduced to the annual per-caput effective dose of 0.58 mSv by dividing by the national population of 47.7 millions. The collective dose is far larger than that of occupational exposures, in the country operated 16 nuclear power plants in 2002, which is no more than 70 man-Sv in the same year. It is particularly noted that the collective dose due to CT scans amounts 9960 man-Sv. These results implies that the national policy for radiation protection should pay much more attention to optimization of patient doses in medicine.

• Proceedings of the Korean Society of Medical Physics Conference
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• 2005.04a
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• pp.25-27
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• 2005

체적소 인형 모의피폭체는 방사선 관련 분야에서 다양하게 사용되고 있으며 최근 의료영상기술과 컴퓨터의 급속한 발전으로 더 많은 각광을 받고 있다. 하지만 현재까지 개발된 체적소 인형 모의피폭체는 환자 등 실제 인체의 영상을 이용하여 제작되었기 때문에 ICRP Reference Man (2002) 등의 표준 자료에 크게 벗어난다. 본 연구에서는 표준 성인 남성의 체형과 골격을 가진 물리적 인형 모의피폭체(ATOM Adult Male Phantom, CIRS, Virginia, USA)에 MIRD형 수학적 인형 모델의 장기들을 정의하여 표준의 체형과 장기를 가진 하이브리드 체적소 인형 모의피폭체를 개발한 후 몬테칼로 전산모사에 사용하였다.

• Health and Mission
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• s.23
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• pp.36-37
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• 2011

• Journal of radiological science and technology
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• v.25 no.2
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• pp.35-38
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• 2002

Recently, They are usually recording the patient information on the Hospital Information System. In the department of Radiology, For the purpose of assuming patient exposed dose, Authors contrived the mathematical calculation model by use of x-ray out put data on the Excel program, if they in put the exposure factors (kVp, mAs, thickness), the program could automatically calculate the patient Skin dose. The assuming data by three dimensional equation has average errors within ${\pm}5%$, there for We could make good use of clinical field in department of radiology.

• Proceedings of the Korean Society of Radiological Science
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• 1992.05a
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• pp.13.2-13.2
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• 1992

• The Journal of the Korea Contents Association
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• v.9 no.4
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• pp.228-235
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• 2009

As we recognize the health care, test of BMD is increased. There are various methods in BMD, Dual Energy X-ray absorptiometry (DEXA) which has high precision and accuracy, and low medical exposure dose has been widely used. To measure the changes of BMD, the test must be done as same posture at first and follow up study performed a year. we analyze the difference in the hour taken before and after the examination by radiologic technologist, frequency of scout scan, and the amount of the radiation exposure. The hour of the examination and frequency of the scout scan were shorten and the dose of the radiation exposure is reduced. As the numerical value of total subjects is converted into that of one person, the duration for the test was 52 seconds, the frequency for the scout scan 0.79 time, and the dose for the radiation exposure $13{\mu}Sv$. When the health care provider perform the precise and easy methods to minimize changes of posture and the skillful ability to manage the test, useless radiation is decreased.

• The Journal of the Korea Contents Association
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• v.11 no.12
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• pp.357-363
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• 2011

The aim of this study is to compare radiation dose in diagnostic X-ray radiography and calculated by different mathematical equation. The result of ESDs direct measurement and that calculated by Mori NDD-M shows the biggest difference. On the other hand, equation by Edmonds shows the lowest difference of ESDs. Also, Rectification due to the difference between direct dose measurement and calculation method commutated three-phase, single phase and inverter type, show less difference in the drive way. In conclusion, this study can be helpful for expecting radiation dose-exposure and control exposure parameters for the diagnostic x-ray radiography.

• Journal of radiological science and technology
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• v.34 no.3
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• pp.189-193
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• 2011

Sitting position upper extremity X-ray examinations (SUEX) is the most widely used patient positioning method for upper extremity X-ray examinations. For this method, the radiation dose is considerable for relatively less interesting organs. We investigated whether patients need to wear the apron during the examination or not. We also studied the examination methods which can reduce the radiation dose. The results showed that radiation dose was reduced as the distance of source to patient becomes longer and the thickness of object grows higher.