| 摘要 |
A method of improving the detection of nuclear weapons in cargo containers. The container moves through an imaging region. An x-ray source emits a cone beam through the imaging region and to two or more detector columns, each detector column defining a fan beam. This hardware combines (1) the use of at least two detector assemblies, (2) use of both the current method and the photon counting method to determine x-ray intensities, and (3) use of large detector elements to increase the measured x-ray intensity by a typical factor of 270. The x-ray intensity for a pixel is read by each detector assembly at the appropriate time and the resulting x-ray intensities from each detector assembly are summed. A method of detecting a nuclear weapon includes identifying the nuclear device as the area of the image wherein a high absorption area is surrounded by a lower absorption area. |
