Method And System For Error Compensation
    1.
    发明申请
    Method And System For Error Compensation 审中-公开
    错误补偿方法与系统

    公开(公告)号:US20090202127A1

    公开(公告)日:2009-08-13

    申请号:US12305983

    申请日:2007-06-13

    IPC分类号: G06K9/00

    摘要: A method for generating a set of kernels for convolution error compensation of a projection image of a physical object recorded by an imaging system comprises calculating the set of kernels in such a way that for each pixel of the projection image an asymmetric scatter distribution for error compensation is calculated representing a X-ray scatter originating along a ray from an X-ray source to the pixel.

    摘要翻译: 用于生成用于由成像系统记录的物理物体的投影图像的卷积误差补偿的一组内核的方法包括以对投影图像的每个像素进行误差补偿的不对称散布分布的方式来计算该组内核 表示沿着从X射线源到像素的射线发生的X射线散射。

    Movable wedge for improved image quality in 3D X-ray imaging
    2.
    发明授权
    Movable wedge for improved image quality in 3D X-ray imaging 有权
    用于3D X射线成像提高图像质量的活动楔块

    公开(公告)号:US08483363B2

    公开(公告)日:2013-07-09

    申请号:US12740366

    申请日:2008-11-04

    IPC分类号: G21K3/00

    摘要: When generating a 3D image of a subject or patient, a cone beam X-ray source (20a, 20b) is mounted to a rotatable gantry (14) opposite an offset flat panel X-ray detector (22a, 22b). A wedge-shaped attenuation filter (24a, 24b) of suitable material (e.g., aluminum or the like) is adjustably positioned in the cone beam to selectively attenuate the beam as a function of the shape, size, and density of a volume of interest (18) through which X-rays pass in order to maintain X-ray intensity or gain at a relatively constant level within a range of acceptable levels.

    摘要翻译: 当产生被摄体或患者的3D图像时,锥形束X射线源(20a,20b)安装到与偏移平板X射线检测器(22a,22b)相对的可旋转机架(14)。 适当材料(例如铝等)的楔形衰减滤波器(24a,24b)可调节地定位在锥形束中,以根据感兴趣体积的形状,尺寸和密度来选择性地衰减光束 (18),以便在可接受水平的范围内使X射线强度或增益保持在相对恒定的水平。

    MOVABLE WEDGE FOR IMPROVED IMAGE QUALITY IN 3D X-RAY IMAGING
    3.
    发明申请
    MOVABLE WEDGE FOR IMPROVED IMAGE QUALITY IN 3D X-RAY IMAGING 有权
    在3D X射线成像中改善图像质量的可移动楔形

    公开(公告)号:US20100308229A1

    公开(公告)日:2010-12-09

    申请号:US12740366

    申请日:2008-11-04

    IPC分类号: G01T1/166 G21K1/10 A61B6/00

    摘要: When generating a 3D image of a subject or patient, a cone beam X-ray source (20a, 20b) is mounted to a rotatable gantry (14) opposite an offset flat panel X-ray detector (22a, 22b). A wedge-shaped attenuation filter (24a, 24b) of suitable material (e.g., aluminum or the like) is adjustably positioned in the cone beam to selectively attenuate the beam as a function of the shape, size, and density of a volume of interest (18) through which X-rays pass in order to maintain X-ray intensity or gain at a relatively constant level within a range of acceptable levels.

    摘要翻译: 当产生被摄体或患者的3D图像时,锥形束X射线源(20a,20b)安装到与偏移平板X射线检测器(22a,22b)相对的可旋转机架(14)。 适当材料(例如铝等)的楔形衰减滤波器(24a,24b)可调节地定位在锥形束中,以根据感兴趣体积的形状,尺寸和密度来选择性地衰减光束 (18),以便在可接受水平的范围内使X射线强度或增益保持在相对恒定的水平。

    Method and system for error compensation
    5.
    发明授权
    Method and system for error compensation 失效
    误差补偿方法和系统

    公开(公告)号:US08000435B2

    公开(公告)日:2011-08-16

    申请号:US12625600

    申请日:2009-11-25

    IPC分类号: A61B6/00

    CPC分类号: G06T11/005

    摘要: A method includes generating a plurality of scatter distributions based on geometric models having different object to detector distances, determining an imaged object to detector distance, and identifying a scatter distribution of the plurality of scatter distributions having a object to detector distance that corresponds to the imaged object to detector distance. The method also includes employing the identified scatter distribution to scatter correct projection data corresponding to the imaged object. Another method includes generating an estimate of wedge scatter by propagating a predetermined wedge scatter profile through an intermediate reconstruction of an object; and employing the estimate to wedge scatter correct the projection data.

    摘要翻译: 一种方法包括基于具有不同对象与检测器距离的几何模型来生成多个散射分布,将成像对象确定为检测器距离,以及识别具有对象的多个散射分布的散射分布与检测器距离对应于被成像 对象到检测器距离。 该方法还包括使用所识别的散布分布散布对应于成像对象的正确投影数据。 另一种方法包括通过传播预定的楔形散射剖面通过对象的中间重建来产生楔散射的估计; 并使用估计来楔形散射校正投影数据。

    Acquisition protocol assessment apparatus
    6.
    发明授权
    Acquisition protocol assessment apparatus 有权
    采集方案评估装置

    公开(公告)号:US09140803B2

    公开(公告)日:2015-09-22

    申请号:US13501257

    申请日:2010-09-16

    摘要: A method includes generating, via a dose estimator, a dose map indicative of an estimated dose deposited in a subject based on acquisition protocol parameter values of an acquisition protocol of an imaging system, and generating, via a noise estimator, at least one of a noise map indicative of an estimated image noise based on the acquisition protocol parameter values or a contrast-to-noise map based on the noise map and an attenuation map. The method further includes displaying, via a display, the dose and noise maps in a human readable format.

    摘要翻译: 一种方法包括:基于成像系统的获取协议的获取协议参数值,经由剂量估计器生成指示被放置在被摄体中的估计剂量的剂量图,并且经由噪声估计器生成以下各项中的至少一个: 基于采集协议参数值或基于噪声图和衰减图的对比噪声映射表示估计图像噪声的噪声映射。 该方法还包括通过显示器以人类可读格式显示剂量和噪声图。

    Imaging apparatus including correction unit for scattered radiation
    7.
    发明授权
    Imaging apparatus including correction unit for scattered radiation 有权
    成像设备包括用于散射辐射的校正单元

    公开(公告)号:US08290116B2

    公开(公告)日:2012-10-16

    申请号:US13063486

    申请日:2009-09-09

    IPC分类号: A61B6/00 G01D18/00

    摘要: The present invention relates to an imaging apparatus for generating an image of a region of interest of an object. The imaging apparatus comprises a radiation source (2) for emitting radiation (4) and a detector (6) for measuring the radiation (4) after having traversed the region of interest and for generating measured detection values depending on the measured radiation (4). The imaging apparatus further comprises an attenuation element for attenuating the radiation (4) before traversing the region of interest and an attenuation element scatter values providing unit (12) for providing attenuation element scatter values, which depend on scattering of the radiation (4) caused by the attenuation element. A detection values correction unit (17) corrects the measured detection values based on the provided attenuation element scatter values, and a reconstruction unit (18) reconstructs an image of the region of interest from the corrected detection values.

    摘要翻译: 本发明涉及一种用于生成对象的感兴趣区域的图像的成像装置。 成像设备包括用于发射辐射的辐射源(2)和用于在穿过感兴趣区域之后测量辐射(4)的检测器(6),并且用于根据所测量的辐射(4)产生测量的检测值, 。 成像装置还包括用于在穿过感兴趣区域之前衰减辐射(4)的衰减元件和用于提供依赖于辐射(4)的散射的衰减元件散射值的衰减元件散射值提供单元(12) 通过衰减元件。 检测值校正单元(17)基于所提供的衰减元件散射值来校正测量的检测值,并且重建单元(18)从校正的检测值重建感兴趣区域的图像。

    IMAGE GENERATION DEVICE WITH OPTIMIZED DOSE CONTROL
    8.
    发明申请
    IMAGE GENERATION DEVICE WITH OPTIMIZED DOSE CONTROL 有权
    具有优化剂量控制的图像生成装置

    公开(公告)号:US20110110573A1

    公开(公告)日:2011-05-12

    申请号:US13000030

    申请日:2009-06-23

    IPC分类号: G06K9/00 G06K9/34

    摘要: The present invention relates to an image generation device for generating an image from measured data, wherein image quality is optimized for a region of interest and to an imaging system comprising this image generation device. The image generation device comprises a noise determination unit for determining a distribution of noise in a projection domain of the region of interest, and a dose control unit (32) for determining a dose profile for a radiation source (2) of said image generation device based on said determined distribution of noise by using a noise propagation algorithm. Thereby, signal-to-noise ratio of a reconstructed volume can be improved and is not sensitively dependent on a selected region of interest.

    摘要翻译: 本发明涉及一种用于根据测量数据产生图像的图像产生装置,其中对于感兴趣的区域和包括该图像生成装置的成像系统优化图像质量。 该图像生成装置包括用于确定感兴趣区域的投影域中的噪声分布的噪声确定单元,以及用于确定所述图像生成装置的辐射源(2)的剂量分布的剂量控制单元(32) 基于所述确定的噪声分布,使用噪声传播算法。 因此,可以改善重建体积的信噪比并且不敏感地依赖于所选择的感兴趣区域。

    METHOD AND SYSTEM FOR ERROR COMPENSATION
    10.
    发明申请
    METHOD AND SYSTEM FOR ERROR COMPENSATION 失效
    错误补偿的方法和系统

    公开(公告)号:US20100119139A1

    公开(公告)日:2010-05-13

    申请号:US12625600

    申请日:2009-11-25

    IPC分类号: G06K9/62

    CPC分类号: G06T11/005

    摘要: A method includes generating a plurality of scatter distributions based on geometric models having different object to detector distances, determining an imaged object to detector distance, and identifying a scatter distribution of the plurality of scatter distributions having a object to detector distance that corresponds to the imaged object to detector distance. The method also includes employing the identified scatter distribution to scatter correct projection data corresponding to the imaged object. Another method includes generating an estimate of wedge scatter by propagating a predetermined wedge scatter profile through an intermediate reconstruction of an object; and employing the estimate to wedge scatter correct the projection data.

    摘要翻译: 一种方法包括基于具有不同对象与检测器距离的几何模型来生成多个散射分布,将成像对象确定为检测器距离,以及识别具有对象的多个散射分布的散射分布与检测器距离对应于被成像 对象到检测器距离。 该方法还包括使用所识别的散布分布散布对应于成像对象的正确投影数据。 另一种方法包括通过传播预定的楔形散射剖面通过对象的中间重建来产生楔散射的估计; 并使用估计来楔形散射校正投影数据。