PERFUSION IMAGING
    11.
    发明申请
    PERFUSION IMAGING 有权
    灌注成像

    公开(公告)号:US20120045109A1

    公开(公告)日:2012-02-23

    申请号:US13266556

    申请日:2010-04-09

    IPC分类号: G06K9/00

    摘要: A method includes decomposing, with a decomposer (118), agent-based time series projection data for an object or a subject into at least an agent based component. A projection data decomposer (118) includes a time series decomposer (204) that determines agent-based projection data based on agent-based time series projection data based on at least two energy dependent components. A computer readable storage medium containing instructions which, when executed by a computer, cause the computer to perform the act of: determining an agent-based component of agent-based time series projection data utilizing at least two components of the agent-based time series projection.

    摘要翻译: 方法包括使用分解器(118)将用于对象或对象的基于代理的时间序列投影数据分解成至少基于代理的组件。 投影数据分解器(118)包括基于基于代理的时间序列投影数据基于至少两个能量相关分量来确定基于代理的投影数据的时间序列分解器(204)。 一种包含指令的计算机可读存储介质,所述指令在被计算机执行时使得所述计算机执行以下动作:使用基于代理的时间序列的至少两个组件来确定基于代理的时间序列投影数据的基于代理的组件 投影。

    Energy spectrum reconstruction
    12.
    发明授权
    Energy spectrum reconstruction 有权
    能谱重建

    公开(公告)号:US08000434B2

    公开(公告)日:2011-08-16

    申请号:US12373112

    申请日:2007-07-02

    IPC分类号: A61B6/00

    CPC分类号: G01T1/2985

    摘要: A computed tomography system includes an x-ray source (108) that rotates about and emits radiation through an imaging region (116). At least one finite energy resolution detector (112) detects the emitted radiation. The at least one finite resolution detector (112) includes a plurality of sub-detectors (204). Each of the plurality of sub-detectors (204) is associated with one or more different energy thresholds. Each of the energy thresholds is used to count a number of incident photons based on a corresponding energy level. A reconstruction system (136) reconstructs the photon counts to generate one or more images of a subject residing within the imaging region (116).

    摘要翻译: 计算机断层摄影系统包括绕着成像区域(116)旋转并发射辐射的x射线源(108)。 至少一个有限能量分辨率检测器(112)检测发射的辐射。 所述至少一个有限分辨率检测器(112)包括多个子检测器(204)。 多个子检测器(204)中的每一个与一个或多个不同的能量阈值相关联。 每个能量阈值用于根据相应的能级对一些入射光子进行计数。 重建系统(136)重建光子计数以产生驻留在成像区域(116)内的对象的一个​​或多个图像。

    Medical X-ray examination apparatus for performing K-edge imaging
    13.
    发明授权
    Medical X-ray examination apparatus for performing K-edge imaging 有权
    用于进行K边缘成像的医用X射线检查装置

    公开(公告)号:US07894569B2

    公开(公告)日:2011-02-22

    申请号:US12743867

    申请日:2008-11-14

    申请人: Roland Proksa

    发明人: Roland Proksa

    IPC分类号: A61B6/00

    摘要: The invention relates to a medical X-ray examination apparatus (1) for performing K-edge imaging. The medical X-ray examination apparatus (1) comprises an imaging unit (21), which is configured to spectrally decompose an X-ray absorption spectrum to image the X-ray absorption spectrum as a conventional X-ray absorption image (23a) and a K-edge absorption image (23b). The conventional X-ray absorption image (23a) includes data elements representing the anatomical background of an object of interest. The K-edge absorption image (23b) includes data elements representing quantitative information of local densities of material showing K-edge absorption within the object of interest. The imaging unit (21) comprises a spatial resolution reducer for reducing the spatial resolution of the K-edge absorption image, so that with a medical X-ray examination apparatus according to the invention an increased sensitivity of the selective imaging of a K-edge absorption image is achieved as compared to the sensitivity of the selective imaging of a K-edge absorption image of a known medical X-ray examination apparatus.

    摘要翻译: 本发明涉及一种用于进行K边缘成像的医用X射线检查装置(1)。 医疗用X射线检查装置(1)具备成像部(21),其被配置为对X射线吸收光谱进行光谱分解,将X射线吸收光谱图像作为常规的X射线吸收图像(23a)和 K边缘吸收图像(23b)。 传统的X射线吸收图像(23a)包括表示感兴趣对象的解剖背景的数据元素。 K边缘吸收图像(23b)包括表示在感兴趣对象内显示K边缘吸收的材料的局部密度的定量信息的数据元素。 成像单元(21)包括用于降低K边缘吸收图像的空间分辨率的空间分辨率降低器,使得利用根据本发明的医用X射线检查装置,K边缘的选择性成像的灵敏度增加 与已知医用X射线检查装置的K边缘吸收图像的选择性成像的灵敏度相比,实现了吸收图像。

    RADIATION DETECTOR WITH MULTIPLE ELECTRODES ON A SENSITIVE LAYER
    14.
    发明申请
    RADIATION DETECTOR WITH MULTIPLE ELECTRODES ON A SENSITIVE LAYER 有权
    辐射探测器与敏感层上的多个电极

    公开(公告)号:US20100187429A1

    公开(公告)日:2010-07-29

    申请号:US12514595

    申请日:2007-11-12

    IPC分类号: G01T1/24

    CPC分类号: G01T1/2928

    摘要: The invention relates to a radiation detector (200), particularly an X-ray detector, which comprises at least one sensitive layer (212) for the conversion of incident photons (X) into electrical signals. A two-dimensional array of electrodes (213) is located on the front side of the sensitive layer (212), while its back side carries a counter-electrode (211). The size of the electrodes (213) may vary in radiation direction (y) for adapting the counting workload of the electrodes. Moreover, the position of the electrodes (213) with respect to the radiation direction (y) provides information about the energy of the detected photons (X).

    摘要翻译: 本发明涉及一种辐射探测器(200),特别是一种X射线检测器,其包括用于将入射光子(X)转换成电信号的至少一个敏感层(212)。 电极(213)的二维阵列位于敏感层(212)的前侧,而其背面承载对电极(211)。 电极(213)的尺寸可以在辐射方向(y)上变化,以适应电极的计数工作量。 此外,电极(213)相对于辐射方向(y)的位置提供关于检测到的光子(X)的能量的信息。

    IMAGING SYSTEM FOR IMAGING AN OBJECT IN AN EXAMINATION ZONE
    15.
    发明申请
    IMAGING SYSTEM FOR IMAGING AN OBJECT IN AN EXAMINATION ZONE 审中-公开
    用于在检查区中成像对象的成像系统

    公开(公告)号:US20100119115A1

    公开(公告)日:2010-05-13

    申请号:US12518475

    申请日:2007-12-10

    申请人: Roland Proksa

    发明人: Roland Proksa

    IPC分类号: G06K9/00 G01N23/04

    摘要: The invention relates to an imaging system for imaging an object (14) in an examination zone (5). The imaging system comprises a radiation source emanating radiation for illuminating the examination zone (5), a detection unit for generating detection values depending on the radiation after having passed the examination zone (5) and a moving unit for moving the 5 radiation source and the examination zone relative to each other along a first trajectory (15) and along a second trajectory (16). The position of at least one of the first trajectory (15) and of the second trajectory (16) with respect to the object is determined by a determination unit. The imaging system further comprises a reconstruction unit for reconstructing an image of the object (14) from the detection values using the determined position of the at least one of 10 the first trajectory (15) and the second trajectory (16).

    摘要翻译: 本发明涉及一种用于对检查区(5)中的物体(14)进行成像的成像系统。 成像系统包括用于照射检查区(5)的辐射源发射辐射,用于在通过检查区(5)之后产生取决于辐射的检测值的检测单元和用于移动5个辐射源的移动单元和 检查区域沿着第一轨迹(15)相对于彼此并沿着第二轨迹(16)。 第一轨迹(15)和第二轨迹(16)中的至少一个相对于物体的位置由确定单元确定。 成像系统还包括重建单元,用于使用所确定的第一轨迹(15)和第二轨迹(16)中的至少一个轨迹的位置,根据检测值重建对象(14)的图像。

    IMAGING SYSTEM FOR IMAGING A REGION OF INTEREST FROM ENERGY-DEPENDENT PROJECTION DATA
    16.
    发明申请
    IMAGING SYSTEM FOR IMAGING A REGION OF INTEREST FROM ENERGY-DEPENDENT PROJECTION DATA 有权
    用于形成能源依赖投影数据的兴趣区域的成像系统

    公开(公告)号:US20100091946A1

    公开(公告)日:2010-04-15

    申请号:US12596751

    申请日:2008-04-17

    申请人: Roland Proksa

    发明人: Roland Proksa

    IPC分类号: G01N23/04 H05G1/60

    摘要: The invention relates to an imaging system for imaging a region of interest from energy-dependent projection data, wherein the imaging system comprises a projection data providing unit (1, 2, 3, 6, 7, 8) for providing energy-dependent first projection data of the region of interest. The imaging system comprises further an attenuation component image generation unit (12) for generating attenuation component images of the region of interest by generating energy-dependent second projection data using a model in which the projection data depend on attenuation component images. The component image generation unit (12) is adapted for generating the attenuation component images such that deviations of the second projection data from the first projection data are reduced.

    摘要翻译: 本发明涉及一种用于从能量相关投影数据对感兴趣区域成像的成像系统,其中成像系统包括投影数据提供单元(1,2,3,6,7,8),用于提供能量依赖的第一投影 感兴趣区域的数据。 成像系统还包括衰减分量图像生成单元(12),用于通过使用其中投影数据取决于衰减分量图像的模型来生成依赖于能量的第二投影数据来产生感兴趣区域的衰减分量图像。 分量图像生成单元(12)适于生成衰减分量图像,使得第二投影数据与第一投影数据的偏差减小。

    CT IMAGING SYSTEM
    17.
    发明申请
    CT IMAGING SYSTEM 有权
    CT成像系统

    公开(公告)号:US20100061504A1

    公开(公告)日:2010-03-11

    申请号:US12517254

    申请日:2007-11-29

    申请人: Roland Proksa

    发明人: Roland Proksa

    IPC分类号: H05G1/60 G01N23/04

    摘要: The invention relates to a CT imaging system for determining the flow of a substance within an object, wherein the CT imaging system comprises a polychromatic X-ray source and an energy-resolving X-ray detector for obtaining detection signals depending on the X-ray radiation after passing through the object. A calculation unit (12) determines a k-edge 5 component of the substance from the detection signals, and a reconstruction unit (13) reconstructs a time series of k-edge image from the determined k-edge component. A flow determination unit (14) determines flow values indicative for the flow within the object from the time series of k-edge images.

    摘要翻译: 本发明涉及一种用于确定物体内物质流动的CT成像系统,其中CT成像系统包括多色X射线源和能量分辨X射线检测器,用于根据X射线获得检测信号 穿过物体后的辐射。 计算单元(12)根据检测信号确定物质的k边缘5分量,重建单元(13)根据确定的k边缘分量重构k边缘图像的时间序列。 流量确定单元(14)根据k边缘图像的时间序列确定指示对象内的流动的流量值。

    Motion artifacts compensation
    18.
    发明授权
    Motion artifacts compensation 失效
    运动假象补偿

    公开(公告)号:US07672490B2

    公开(公告)日:2010-03-02

    申请号:US10597871

    申请日:2005-02-04

    IPC分类号: G06K9/00 A61B6/00 A61B5/05

    摘要: Motion is one of the most critical sources of artifacts in helical conebeam CT. By comparing opposite rays corresponding to projection data, the amount of motion may be estimated and, in the following suppression of corresponding motion artifacts may be performed according to an exemplary embodiment of the present invention. The method of motion artifact compensation may be implemented in both approximate reconstruction algorithms and exact reconstruction algorithms. Advantageously, motion during the data acquisition is detected automatically and related motion artifacts may be suppressed adaptively.

    摘要翻译: 运动是螺旋锥束CT中最重要的文物来源之一。 通过比较与投影数据相对应的相对射线,可以估计运动量,并且可以根据本发明的示例性实施例来执行以下对相应运动伪像的抑制。 运动伪像补偿的方法可以在近似重建算法和精确重构算法中实现。 有利地,自动检测数据采集期间的运动,并且可以自适应地抑制相关的运动伪像。

    Computer tomography method for a periodically moving object
    19.
    发明授权
    Computer tomography method for a periodically moving object 有权
    用于周期性移动物体的计算机断层摄影方法

    公开(公告)号:US07426257B2

    公开(公告)日:2008-09-16

    申请号:US10552399

    申请日:2004-04-02

    IPC分类号: A61B6/03

    摘要: The invention relates to a computer tomography method in which a periodically moving object, in particular an organ of the body, is irradiated by a cone-shaped beam cluster (4) along a trajectory which runs on a cylindrical surface. The radiation transmitted through the object is measured by means of a detector unit (16), and at the same time the periodic movement of the object is recorded. In order to reconstruct the absorption distribution of the object, the measured values or the corresponding beams are rebinned to form a number of parallel projections, where for each of these projections a measured value is determined whose beam irradiates the object. The point in time at which this measured value was acquired is allocated to the respective projection. For the reconstruction, which may for example be carried out using a filtered back-projection, only projections whose allocated points in time lie within a predefined, specific time range (H1) within a period of the object movement are used.

    摘要翻译: 本发明涉及一种计算机断层摄影方法,其中周期性移动的物体,特别是身体的脏器被沿着在圆柱形表面上运行的轨迹由锥形束簇(4)照射。 通过检测器单元(16)测量透过物体的辐射,同时记录物体的周期性运动。 为了重建物体的吸收分布,将测量值或对应的光束重新组合以形成多个平行投影,其中对于这些投影中的每一个,确定其光束照射物体的测量值。 将获取该测量值的时间点分配给相应的投影。 对于可以例如使用滤波反投影来进行的重建,仅使用其分配的时间点在物体移动的时段内在预定义的特定时间范围(H 1)内的投影。

    Energy-Resolved Photon Counting For Ct
    20.
    发明申请
    Energy-Resolved Photon Counting For Ct 失效
    能量解析光子计数

    公开(公告)号:US20080205585A1

    公开(公告)日:2008-08-28

    申请号:US11912689

    申请日:2006-04-25

    IPC分类号: A61B6/00

    摘要: Spectral CT systems require cheap detectors with high energy resolution. According to an aspect of the present invention, a computer tomography apparatus comprises a detector element which is segmented into a plurality of sub-pixels. Each sub-pixel has at least two thresholds and counting channels, wherein the second threshold for each sub-pixel varies over the nominal detector element. This may provide for an improved energy-resolved photon counting.

    摘要翻译: 光谱CT系统需要具有高能量分辨率的廉价检测器。 根据本发明的一个方面,计算机断层摄影装置包括被分割成多个子像素的检测器元件。 每个子像素具有至少两个阈值和计数通道,其中每个子像素的第二阈值在标称检测器元件上变化。 这可以提供改进的能量分辨光子计数。