| 箱包CT检测系统弱信号情况下的CT成像实验研究 |
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| 引用本文： | 刘金汇. 箱包CT检测系统弱信号情况下的CT成像实验研究[J]. CT理论与应用研究, 2014, 23(6): 931-938. |
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| 作者姓名： | 刘金汇 |
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| 作者单位： | [1]清华大学核能与新能源技术研究院,北京100084; [2]清华大学核检测技术北京市重点实验室,北京100084 |
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| 摘 要： | 在箱包CT检测中, 当放射源活度很低的情况时, 对CT成像进行了实验研究。利用多次累加的方法降低统计涨落和噪声的影响, 使CT图像质量得到提高。实验证明对于弱信号情况下, 利用多次累加的方法, CT成像具有比较高的质量, 能够实现物性判别的要求。另外对于A/D量化误差也进行了分析。
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| 关 键 词： | 弱信号 量化误差 CT成像 |
| 收稿时间： | 2014-07-21 |
Experimental Study of CT Imaging Under Weak Signal for Luggage CT Inspection System |
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| LIU Jin-hui. Experimental Study of CT Imaging Under Weak Signal for Luggage CT Inspection System[J]. CT Theory and Applications, 2014, 23(6): 931-938. |
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| Authors: | LIU Jin-hui |
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| Affiliation: | LIU Jin-hui(a. Institute of Nuclear and New Energy Technology; b. Beijing Key Laboratory of Nuclear Detection and Measurement, Tsinghua University, Beijing 100084, China) |
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| Abstract: | The experimental study of CT imaging was carried out when the activity of radiation source is very low in the case of CT detection for luggage CT inspection system. The method of adding and averaging was used to reduce the effect of statistical fluctuation and noise. And the quality of CT image is improved. Experiments show that for weak signal conditions, using the method of adding and averaging, CT imaging has high quality and can realize property identification requirements. In addition, the A/D quantization error is also analyzed. |
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| Keywords: | weak signal quantization error CT imaging |
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