箱包CT检测系统弱信号情况下的CT成像实验研究

详细信息

Experimental Study of CT Imaging Under Weak Signal for Luggage CT Inspection System

1. Institute of Nuclear and New Energy Technology, Tsinghua University, Beijing 100084, China;
2. Beijing Key Laboratory of Nuclear Detection and Measurement, Tsinghua University, Beijing 100084, China

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。
- 弱信号 /
- 量化误差 /
- CT成像
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.
- weak signal /
- quantization error /
- CT imaging