X-ray CT reconstruction algorithms for airport security and process tomography

尽管目前使用x射线计算机断层扫描来扫描机场行李，寻找潜在的爆炸装置，但这些机器速度很慢，而且会产生大量的误报。英国CXR公司开发了一种x射线扫描仪，具有多个光源，可以按预定顺序打开。这比传统的方法要快得多，传统的方法是在物体周围旋转单个光源。然而，从该系统中重建图像需要新的数学理论和算法。新的快速系统还可用于监测管道中油、气和水等混合物的流动，这是石油开采行业的一个重要问题。在这个项目中，我们将为这些应用开发和测试新的重建算法。

Although X-ray computerized tomography is currently used to scan airport luggage for potential explosive devices, these machines are slow and produce a large number of false positives. A UK company CXR have developed an X-ray scanner with multiple sources that can be switched on in a predetermined sequence. This is much faster than the the conventional approach where a single source is rotated around the object. However the reconstruction of images from this sytem requires new mathematical theory and algorithms.The new fast system can also be used to monitor the flow of mixtures such as oil, gas and water in in pipes, an important problem in the oil extraction industry.In this project we will develop and test new reconstruction algorithms for these applications.