X-Ray Examination Apparatus and Radiation Detector
    1.
    发明申请
    X-Ray Examination Apparatus and Radiation Detector 失效
    X射线检查仪和放射检测仪

    公开(公告)号:US20070272871A1

    公开(公告)日:2007-11-29

    申请号:US11568271

    申请日:2005-04-25

    IPC分类号: G01T1/24

    CPC分类号: H04N5/32

    摘要: The invention relates to an X-ray detector (1) with an array (2) of sensor elements (21), wherein each row (i) of sensor elements is connected via an addressing line to an addressing unit (5), and wherein each column j) of sensor elements is connected via a read-out line to a read-out unit (3). In the read-out unit (3), sensor signals are preprocessed, for example amplified by amplifiers (31). The detector further comprises a control unit (6) which is adapted to set the gains of said amplifiers (31) for each column (j) and each row (i) individually. The values of the gains may particularly be derived from a priori knowledge, from previous images of the object, or from the image signals of rows that have already been read out.

    摘要翻译: 本发明涉及具有传感器元件(21)阵列(2)的X射线检测器(1),其中传感器元件的每一行(i)经由寻址线连接到寻址单元(5),并且其中 传感器元件的每个列j)经由读出线连接到读出单元(3)。 在读出单元(3)中,传感器信号被预处理,例如由放大器(31)放大。 检测器还包括控制单元(6),该控制单元适于为每个列(j)和每一行(i)分别设置所述放大器(31)的增益。 增益的值可以特别地从先验知识,从对象的先前图像,或者已经被读出的行的图像信号导出。

    X-ray examination apparatus and radiation detector
    2.
    发明授权
    X-ray examination apparatus and radiation detector 失效
    X射线检查仪和放射线检测仪

    公开(公告)号:US07408166B2

    公开(公告)日:2008-08-05

    申请号:US11568271

    申请日:2005-04-25

    IPC分类号: G01J1/24

    CPC分类号: H04N5/32

    摘要: The invention relates to an X-ray detector (1) with an array (2) of sensor elements (21), wherein each row (i) of sensor elements is connected via an addressing line to an addressing unit (5), and wherein each column j) of sensor elements is connected via a read-out line to a read-out unit (3). In the read-out unit (3), sensor signals are preprocessed, for example amplified by amplifiers (31). The detector further comprises a control unit (6) which is adapted to set the gains of said amplifiers (31) for each column (j) and each row (i) individually. The values of the gains may particularly be derived from a priori knowledge, from previous images of the object, or from the image signals of rows that have already been read out.

    摘要翻译: 本发明涉及具有传感器元件(21)阵列(2)的X射线检测器(1),其中传感器元件的每一行(i)经由寻址线连接到寻址单元(5),并且其中 传感器元件的每个列j)经由读出线连接到读出单元(3)。 在读出单元(3)中,传感器信号被预处理,例如由放大器(31)放大。 检测器还包括控制单元(6),该控制单元适于为每个列(j)和每一行(i)分别设置所述放大器(31)的增益。 增益的值可以特别地从先验知识,从对象的先前图像,或者已经被读出的行的图像信号导出。

    Apparatus and Method for the Processing of Sectional Images
    4.
    发明申请
    Apparatus and Method for the Processing of Sectional Images 审中-公开
    用于处理截面图像的装置和方法

    公开(公告)号:US20080144904A1

    公开(公告)日:2008-06-19

    申请号:US10597713

    申请日:2005-02-01

    IPC分类号: G06K9/00

    摘要: The invention relates to an apparatus and a method for the processing of reconstructed 3D images (I) in C-arm based volume imaging which often exhibit spatially slowly varying inhomogeneities caused by inconsistent projection data. To correct the images (I), a retrospective homogenization procedure is proposed. The image (I) is segmented (11, 12) into principal classes like bone, tissue and air based on their gray values. Only the tissue-regions (M) are then used as support in order to fit (14) a spatially slowly varying 2D baseline (B) representing the smooth shape of cupping or other inhomogeneities. Finally the inverse of the estimated 2D baseline is subtracted from the original slice (I) to correct for the inhomogeneities.

    摘要翻译: 本发明涉及一种用于处理基于C臂的体积成像中的重建3D图像(I)的装置和方法,其经常表现出由不一致的投影数据引起的空间上缓慢变化的不均匀性。 为了校正图像(I),提出了回顾性均匀化程序。 图像(I)根据其灰度值被分段(11,12)成主要类,如骨,组织和空气。 然后仅使用组织区域(M)作为支撑体,以便适应(14)代表拔罐或其他不均匀性的平滑形状的空间上缓慢变化的2D基线(B)。 最后,从原始切片(I)中减去估计的2D基线的逆,以校正不均匀性。

    Enhanced image data/dose reduction
    6.
    发明授权
    Enhanced image data/dose reduction 有权
    增强的图像数据/剂量减少

    公开(公告)号:US08938110B2

    公开(公告)日:2015-01-20

    申请号:US13508751

    申请日:2010-10-29

    摘要: A method includes generating enhanced image data based on lower dose image data and a predetermined image quality threshold, wherein an image quality of the enhanced image data is substantially similar to an image quality of higher dose image data, and a system includes an image quality enhancer (128) that generates enhanced image data based on lower dose image data and a predetermined image quality threshold, wherein an image quality of the enhanced image data is substantially similar to an image quality of higher dose image data.

    摘要翻译: 一种方法包括基于较低剂量图像数据和预定图像质量阈值生成增强图像数据,其中增强图像数据的图像质量基本上类似于较高剂量图像数据的图像质量,并且系统包括图像质量增强器 (128),其基于较低剂量图像数据和预定图像质量阈值生成增强图像数据,其中所述增强图像数据的图像质量基本上类似于较高剂量图像数据的图像质量。

    Method and system for error compensation
    7.
    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。

    Method and apparatus for triggering image acquisition in a c-arm system by a rotary encoder
    8.
    发明申请
    Method and apparatus for triggering image acquisition in a c-arm system by a rotary encoder 失效
    用于通过旋转编码器在c臂系统中触发图像采集的方法和装置

    公开(公告)号:US20070015986A1

    公开(公告)日:2007-01-18

    申请号:US10555575

    申请日:2004-04-26

    IPC分类号: A61B5/05

    CPC分类号: A61B6/4441 A61B6/547

    摘要: Method of generating an image of an object by means of an imaging system which has a radiation source that rotates relative to the object about an axis of rotation within a defined rotation angle range, said radiation source projecting radiation onto a radiation detector in order to record projection data, wherein at predefinable relative rotation angle positions of the radiation source a signal which is used to trigger recording of the projection data is generated, and also apparatus for carrying out this method.

    摘要翻译: 通过成像系统生成物体的图像的方法,所述成像系统具有围绕限定的旋转角度范围内的旋转轴线相对于物体旋转的辐射源,所述辐射源将辐射投射到辐射检测器上以便记录 投影数据,其中在辐射源的预定的相对旋转角度位置处产生用于触发投影数据的记录的信号,以及用于执行该方法的装置。

    Movable wedge for improved image quality in 3D X-ray imaging
    9.
    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
    10.
    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。