| Obtaining low energy γ dose with CMOS sensors |
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| 引用本文： | 王芳,王明远,刘玉芳,马春旺,常乐.Obtaining low energy γ dose with CMOS sensors[J].核技术(英文版),2014(6). |
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| 作者姓名： | 王芳 王明远 刘玉芳 马春旺 常乐 |
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| 基金项目： | Supported by National Natural Science Foundation of China(No.10905017);the Science and Technology Innovation Team Support Plan in Henan Province(No.13IRTSTHN016) |
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| 摘 要： | A method is established for measuring low energy γ-rays dose by using CMOS sensors without any X-/γ-ray converters. Gamma-ray source of241 Am and152Eu are used to test the system. Based on gray value, an analysis method is proposed to obtain the γ-ray dose. Cumulative dose is determined by correlating the gray value to the dose readings of standard dosimeters. The relationship between gray value and the cumulative dose of γ-rays are trained by using back propagation neural network with BFGS algorithm. After comparison, it shows that BFGS algorithm trainings are suitable for different γ-ray sources under higher error condition. These indicate the feasibility of measuring low energy γ-ray dose by using common CMOS image sensors.
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| 关 键 词： | CMOS image sensor Low energy γ-ray detection Image processing BP neural network BFGS algorithm |
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