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    • 33. 发明申请
    • CT SYSTEMS AND METHODS THEREOF
    • CT系统及其方法
    • US20150199804A1
    • 2015-07-16
    • US14576705
    • 2014-12-19
    • Tsinghua UniversityNuctech Company Limited
    • Zhiqiang CHENLi ZHANGJi ZHAOQingping HUANGXin JIN
    • G06T7/00
    • G06T7/0002G01V5/005G06T2207/30112
    • A CT system and method thereof are discloses. The system includes: a fixed multi-plane multi-source X-ray generation device and a control system thereof that provide X-ray source used in luggage inspection; a single-energy, pseudo-dual-energy or spectral detector system and data transfer system that receive perspective data of X ray penetrating the luggage, and transfer the data to a computer for processing; a conveyor and a control system thereof that control a speed for moving the luggage forth and back, and perform tomogram scanning; and a host computer system that performs tomogram reconstruction and provides man-machine interaction. The system takes full advantage of characteristics, such as high speed and stability, brought by the distributed ray sources which replace the normal slip ring technology. The system also adopts the idea of inverse-geometry CT, and reduces detector area and cost by increasing the number of ray sources. With the reduction of detector area, cone-beam artifacts and cup-shape artifacts caused by scattering are also reduced, and influence of the oblique effect on registration of dual-energy data is suppressed.
    • 公开了一种CT系统及其方法。 该系统包括:提供行李检查中使用的X射线源的固定多平面多源X射线产生装置及其控制系统; 单能量,伪双能量或光谱检测器系统和数据传输系统,其接收穿透行李的X射线的透视数据,并将数据传送到计算机进行处理; 输送机及其控制系统,其控制行李前后移动的速度,并执行断层图像扫描; 以及执行断层图像重建并提供人机交互的主计算机系统。 系统充分利用了代替普通滑环技术的分布式射线源带来的高速度,稳定性等特点。 该系统还采用反几何CT的思想,通过增加射线源数量,减少探测器面积和成本。 随着检测器面积的减小,散射引起的锥束伪影和杯形伪影也减少,并且斜率对双能数据配准的影响受到抑制。