CAJ | 학술논문

研究了边界能量为1-10MeV的高能X射线成像系统中采用双能成像法识别物质问题.通过研究其物理机理,提出了一个近似线性的数学模型;定义了物质识别灵敏度用于评价物质识别效果;发现了双能X射线的最优能谱分布区间.提出并验证了面向最优能谱分布区间的双能X射线能谱调制方法,大大提高了物质识别灵敏度,并较好解决了不易识别薄物质的问题.建成了9MeV/6MeV交替双能成像实验样机,获得了物质识别着色图像.相关实验研究结果与理论研究符合得很好.
연구료변계능량위1-10MeV적고능X사선성상계통중채용쌍능성상법식별물질문제.통과연구기물리궤리,제출료일개근사선성적수학모형;정의료물질식별령민도용우평개물질식별효과;발현료쌍능X사선적최우능보분포구간.제출병험증료면향최우능보분포구간적쌍능X사선능보조제방법,대대제고료물질식별령민도,병교호해결료불역식별박물질적문제.건성료9MeV/6MeV교체쌍능성상실험양궤,획득료물질식별착색도상.상관실험연구결과여이론연구부합득흔호.
Material discrimination by high-energy (1-10MeV) X-ray dual-energy imaging is investigated in this paper, and an approximately linear model is also proposed. The sensitivity of material discrimination is defined to evaluate the effect of material discrimination. The energy ranges of dual-energy X-ray are optimized by analyzing the X-ray attenuation coefficients after the X-ray penetrate the materials. The sensitivity of material discrimination can be improved by modulating the X-ray energy spectrum with filters. A prototype emitting alternating dual-energy X-ray with 9MeV & 6MeV boundary energies is designed. It can present us the tinctorial images with the material discrimination information. Finally, the experimental results we made agree with the theoretical simulation.