公开(公告)号：US11789175B2

公开(公告)日：2023-10-17

申请号：US17302320

申请日：2021-04-30

申请人： Baolei Li ,  Yantao Hu ,  Yunxiang Li ,  Zhili Cui ,  Jian Gao ,  Jie Luo

发明人： Baolei Li ,  Yantao Hu ,  Yunxiang Li ,  Zhili Cui ,  Jian Gao ,  Jie Luo

IPC分类号： G01V5/00

CPC分类号： G01V5/005

摘要： A multi-energy static security CT system comprises at least one N-stage image chain structure (5) and a baggage conveying belt (4) provided at an inner side at the bottom of the N-stage image chain structure (5). The N-stage image chain structure (5) and the baggage conveying belt (4) are fixed at a pre-configured positions by means of a machine frame (8). The N-stage image chain structures (5) are sequentially arranged in a forward direction of a baggage channel, and adjacent N-stage image chain structures (5) are offset relative to each other. By exposing radiation sources in the N-stage image chain structure (5) at different times, the static security CT system generates an image having a higher temporal resolution and more energy spectrum levels than an image generated by a spiral CT system. Also provided is an imaging method implemented by means of the static security CT system.

公开(公告)号：US08064676B2

公开(公告)日：2011-11-22

申请号：US12514541

申请日：2007-06-08

申请人： Yunxiang Li ,  Hongguang Cao

发明人： Yunxiang Li ,  Hongguang Cao

IPC分类号： G06K9/00

CPC分类号： A61B6/00 ,  A61B6/5282 ,  G03B42/02 ,  G06T5/002 ,  G06T5/003 ,  G06T5/008 ,  G06T5/50 ,  G06T2207/10116 ,  G06T2207/20016 ,  G06T2207/30004

摘要： A virtual grid imaging method capable of eliminating scattered radiation effect and an imaging system thereof for imaging with high energy rays, in which scattered rays reaching a surface of a detector are not filtered, and data of the scattered rays and straight rays are all sampled. The method includes decomposing a digital image into multi-band images from high to low according to frequencies; performing de-scattering process for low-frequency band images; performing contrast enhancement process for high-frequency band images; and merging the images of various frequency bands processed in the second and third steps, and forming an output image. In digital X-ray imaging the scattered radiation effect is eliminated. Significant reduction of the dosage of the rays, in which only one third of the required dosage of a common grid is used to obtain the same image brightness.

摘要翻译： 能够消除散射辐射效应的虚拟网格成像方法及其成像系统，其中高能射线成像，其中到达检测器表面的散射光未被滤波，并且散射光线和直线的数据都被采样。 该方法包括根据频率将数字图像从高到低分解为多频带图像; 对低频带图像执行去散射处理; 对高频带图像进行对比度增强处理; 并且合并在第二和第三步骤中处理的各种频带的图像，并且形成输出图像。 在数字X射线成像中，消除了散射辐射效应。 明显减少光线的剂量，其中仅使用三分之一的所需剂量的共同网格来获得相同的图像亮度。