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| Study and Analysis of the Influence of Measuring Phantom on Protective Effect of Medical Accelerator Rooms |
| TANG Xiao-hao1, REN Fu-li2, PAN Shi-xiang3, CAO Lei4, DENG Jun4 |
1. China Institute of Atomic Energy, Beijing 102413 China;
2. Inner Mongolia Health Supervision;
3. The Affiliater Hospital of Qingdao University;
4. National Institute for Radiological Protection, Chinese Center for Disease Control and Prevention |
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Abstract Objective The protective effect of medical accelerator room was analyzed, and shielding data were accumulated so as to provide the control of occupational exposure with scientific reference through in-site measurement and calculation with the existence of measuring phantom. Methods Radiation levels at concerned points were measured by X-ray dose rate meter with and without phantom, and accordance degree between the data measured and the one calculated based on NCRP 151 report was analyzed. Results The result shows that the X-ray dose level at the entrance of room and in the maze was increased with the use of phantom. Meanwhile, it shows strong link between scattered X-ray and radiation protection design of the maze and the orientation of X-rays. Conclusion Attention should be paid to the influence of measuring phantom on protective effect of treating room, and proper assessing model and method should be chosen to carry out the radioactive occupational hazard assessment for medical accelerator room.
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Received: 27 November 2013
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