• Title/Summary/Keyword: 방사선 발생장치

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Assessment of Spatial Dose Distribution in the Diagnostic Imaging Laboratory by Monte Carlo Simulation (몬테카를로 전산해석에 의한 X선 실습실의 공간선량분포 평가)

  • Cho, Yun-Hyeong;Kang, Bo Sun
    • Journal of the Korean Society of Radiology
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    • v.11 no.6
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    • pp.423-428
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    • 2017
  • In this study, the calculation of the effective spatial dose distribution of the diagnostic imaging laboratory of K university was performed by the Monte Carlo simulation. The radiation generator has a maximum tube voltage of 150 kVp and a maximum current of 700 mA. Using the results, we compared the spatial effective dose distributions of diagnostic imaging laboratory when the shielding door was closed and opened. In conclusion, it was found that the effective dose in the operating room of the diagnostic imaging laboratory does not exceed the annual dose limit (6 mSv/y) of the student (occasional visitor) even when the door is opened. However, since the effective dose when the door is open is about 16 times higher in front of the lead glass window and about 3,000 times higher in front of the doorway than the case when the door is closed, closing the shielding door at the time of the practical exercising reduces unnecessary radiation exposure by great extent.

A Study on QA for Radiation Therapy Machine by Using Implemented Electronic Portal Imaging Device (전자포탈영상장치의 제작과 방사선치료장치의 QA 적용에 관한 연구)

  • Lee, Dong-Hoon
    • Journal of the Institute of Electronics Engineers of Korea SC
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    • v.43 no.6 s.312
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    • pp.68-75
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    • 2006
  • During cancer therapy by using high energy radiation, it is possible to improve the radiation therapy efficiency by performing a precise radiation therapy after verification of generated setup errors. In this paper, the video based electronic portal imaging device (EPID) which could display the portal image with near real time was developed to verify treatment position errors in radiation therapy instead of an analog typed portal film. This EPID system for applying QA tool of radiation therapy machine was consisted of a metal/fluorescent screen, $45^{\circ}$mirror, camera and image grabber. Radiation field verification has been performed to check quality assurance of the treatment machine itself by using this EPID system. The radiation field error was easily observed by edge detection of irradiated field size on EPID image when $0.6^{\circ}$ shift of collimator angle was generated. So, this implemented EPID system could be used as a radiation QA tool.

Knowledge, Attitude, and Practice of Radiation Management among Radiation Generating Device Manufacturers and Medical Personnel (방사선 발생장치 제조업체 및 의료기관 종사자의 방사선 관리에 대한 지식, 태도 및 실천)

  • Kim, Kyu-Hwan;Bae, Seok-Hwan
    • Journal of the Korea Academia-Industrial cooperation Society
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    • v.22 no.2
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    • pp.418-426
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    • 2021
  • This study investigates the perception of radiation safety management in radiation generator manufacturing workers and medical institutions. The basic data obtained is further applied to improve active coping ability and safety levels. The knowledge and attitude practice score of radiation was found to be related to gender, age, marital status, occupation, position, current work period, total work period, radiation related work period, the manual available, defense facility maintenance, number of defense equipment, radiation safety education, special health examination, and recognition of radiation terms. In particular, the knowledge score of radiologists was highest among the radiation-related occupations (<0.05). Radiation safety management requires active defense endeavors to prevent radiation exposure, by both workers of radiation manufacturers and medical institutions. Moreover, institutional devices such as compliance with guidelines, periodic education, facility reinforcement, manual preparation, and special health checkups are required for efficient radiation safety management.

Temperature compensation algorithm implemented in a portable radiation detection device based on the Android platform (안드로이드 플랫폼 기반의 휴대용 방사선 검출장치에서의 온도보상 알고리즘 구현)

  • Lee, Jon-hwey;Kim, Young-kil
    • Proceedings of the Korean Institute of Information and Commucation Sciences Conference
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    • 2013.05a
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    • pp.141-143
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    • 2013
  • Portable radiation detection devices currently available, there are a lot of functional constraints. In order to solve these drawbacks, research has been done on a portable radiation detection device based on the Android platform. Since the early stages of research, it is possible to measure the radiation, but The accuracy is worse than the product being sold. Portable radiation detection device based on the Android platform, the error occurs when the temperature changes. Temperature compensation algorithm was implemented to improve accuracy by eliminating errors due to temperature changes.

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A Base Study on the Constancy Quality Control Test and Clause of Diagnosis Radiation Equipment (진단용 방사선 발생장치의 수시 정도관리 항목 및 기준에 관한 기초 연구)

  • Heo, Yeji;Kim, Kyotae;Noh, Sicheul;Nam, Sanghee;Park, Jikoon
    • Journal of the Korean Society of Radiology
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    • v.8 no.3
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    • pp.105-110
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    • 2014
  • Diagnostic radiation equipment diagnosis and treatment of disease of recent plays a central role, but this is based on the assumption of an appropriate balance of benefits and risks of diagnostic. If balance is not maintained has the potential to give an adverse effect on the health of the public. In the case of an overseas, the importance of (QA) quality assurance of medical equipment is growing, but evaluation criteria of quality assurance has not been clearly presented in domestic. Therefore, the modernization of medical equipment from the point at which the degree of cycle-by-cycle management system of foreign national to be suitable for diagnostic radiation generator entry and quality control standards by introducing a tailoring is necessary. In this study the most frequently used diagnostic radiation generator X-ray imaging apparatus of the general three-year periodic inspections at any time between the periodic inspection items and quality control methods and standards for the establishment of the United States, Canada and abroad, and international electronic literature search Technical Committee (International Electro-technical Commission, IEC) were compared with the provisions of item. Based on the national quality control items when opening frequent inspection items and standards presented as a basis for setting up study.