Computed tomography method and apparatus for acquiring images dependent on a time curve of a periodic motion of the subject
    2.
    发明授权
    Computed tomography method and apparatus for acquiring images dependent on a time curve of a periodic motion of the subject 有权
    计算机断层扫描方法和装置,用于根据受试者的周期性运动的时间曲线获取图像

    公开(公告)号:US06665370B2

    公开(公告)日:2003-12-16

    申请号:US10191628

    申请日:2002-07-09

    IPC分类号: A61B603

    摘要: In a spiral scan cone beam computed tomography method and apparatus, the output data are divided into sub-segments being shorter than the length required for the reconstruction of a CT image. Segment images having inclined image plane relative to the system axis are reconstructed for the sub-segments. A signal reproducing the time curve of the periodic motion is acquired during the scanning. A z-position on the system axis and a time position with respect to the periodic motion are allocated to the segment images. Segment images belonging to a desired range of z-positions and a desired range of time positions are selected such that the corresponding sub-segments have an overall length adequate for the reconstruction of a CT image. The selected segment images are at least indirectly combined into a resulting CT image with respect to a target image plane.

    摘要翻译: 在螺旋扫描锥束计算机断层摄影方法和装置中,输出数据被划分成比CT图像的重建所需的长度短的子段。 对于子段重建具有相对于系统轴的倾斜图像平面的段图像。 在扫描期间获取再现周期性运动的时间曲线的信号。 系统轴上的z位置和相对于周期运动的时间位置被分配给段图像。 选择属于期望的Z位置范围和期望的时间位置范围的段图像,使得对应的子段具有足以用于重建CT图像的总长度。 所选择的段图像至少间接地组合成相对于目标图像平面的结果CT图像。

    Computed tomography method and computed tomography apparatus
    3.
    发明授权
    Computed tomography method and computed tomography apparatus 有权
    计算机断层摄影法和计算机断层摄影仪

    公开(公告)号:US06819736B1

    公开(公告)日:2004-11-16

    申请号:US10371702

    申请日:2003-02-20

    IPC分类号: A61B603

    摘要: The invention relates to a method for performing computer tomography, and to a computed tomography (CT) apparatus, in which a) for scanning an object by a cone-shaped beam exiting from a focal point and by a matrix-like detector array for detecting the beam, the focal point is moved in relation to the object on a spiral path, whose center axis corresponds to a system axis, and the detector array provides output data corresponding to the received radiation; and b) for imaging an object region that executes a periodic motion, a signal that reproduces the course over time of the periodic motion is obtained during the scanning; c) from output data furnished during the motion of the focal point on a spiral segment, images with an inclined image plane are reconstructed, the image planes being inclined relative to the system axis both about a first axis, which perpendicularly intersects the system axis, by an angle of inclination &ggr; and about a second axis, which perpendicularly intersects both the first axis and the system axis, by a tilt angle &dgr;; and spiral segments that immediately succeed one another overlap one another by an overlap angle that is greater than or equal to zero; and the spiral segments are selected, taking into account the signal that reproduces the course over time of the periodic motion, such that they correspond to a phase of the periodic motion that is to be imaged.

    摘要翻译: 本发明涉及一种用于执行计算机断层摄影的方法,以及计算机断层摄影(CT)装置,其中a)通过从焦点出射的锥形束和用于检测的矩阵状检测器阵列扫描物体 光束,焦点相对于螺旋路径上的物体移动,螺旋路径的中心轴对应于系统轴,并且检测器阵列提供对应于接收到的辐射的输出数据; 以及b)为了对执行周期性运动的对象区域进行成像,在扫描期间获得在周期性运动中再现该过程的信号; c)从在焦点的运动中在螺旋段上提供的输出数据中重建具有倾斜图像平面的图像,图像平面相对于垂直于系统轴线的第一轴线相对于系统轴线倾斜, 通过与第一轴和系统轴两者垂直相交的倾斜角γ和大约第二轴的倾斜角δ; 并且立即成功的螺旋段彼此重叠大于或等于零的重叠角; 并且考虑到再现周期性运动的时间过程的信号,使得它们对应于要成像的周期性运动的相位,并选择螺旋段。

    Method and apparatus for spiral scan computed tomography
    4.
    发明授权
    Method and apparatus for spiral scan computed tomography 有权
    螺旋扫描计算机断层扫描的方法和装置

    公开(公告)号:US07215805B2

    公开(公告)日:2007-05-08

    申请号:US10074145

    申请日:2002-02-12

    IPC分类号: G06K9/00

    摘要: In a method for computed tomography and a computed tomography apparatus for scanning a subject with a conical ray beam emanating from a focus that detects a matrix-like detector array, the focus is moved relative to the subject on a spiral path around a system axis, and the detector array supplies output data corresponding to the incident radiation, and images having an inclined image plane are reconstructed from output data respectively supplied during the movement of the focus on a spiral segment, the image planes of these images are inclined by an inclination angle γ around a first axis intersecting the system axis at a right angle and also are inclined by a tilt angle δ with respect to the system axis around a second axis that intersects the first axis as well as the system axis at a right angle.

    摘要翻译: 在用于计算机断层摄影的方法和用于使用从检测矩阵状检测器阵列的焦点发出的锥形射线束扫描对象的计算机断层摄影装置中,聚焦在围绕系统轴线的螺旋路径上相对于被摄体移动, 并且检测器阵列提供对应于入射辐射的输出数据,并且具有倾斜图像平面的图像从在焦点移动到螺旋段时分别提供的输出数据重建,这些图像的图像平面倾斜倾斜角 围绕与系统轴线成直角相交的第一轴线的伽马,并且相对于围绕与第一轴线相交的第二轴线的系统轴线以及直角的系统轴线倾斜倾斜角度。

    Imaging method for a multi-slice spiral CT scan with 3D reconstruction, and a computed tomography unit for carrying out this method
    5.
    发明授权
    Imaging method for a multi-slice spiral CT scan with 3D reconstruction, and a computed tomography unit for carrying out this method 失效
    用于具有3D重建的多层螺旋CT扫描的成像方法,以及用于执行该方法的计算机断层摄影单元

    公开(公告)号:US07058156B2

    公开(公告)日:2006-06-06

    申请号:US10686596

    申请日:2003-10-17

    IPC分类号: A61B6/03

    摘要: An imaging method is for a multi-slice spiral CT scan with 3D back projection. Use is made, for the reconstruction of the absorption value of at least one voxel, of the measured and filtered data that are produced by rays which penetrate the at least one voxel. A CT unit is further used to carry out the method. In the method, the filtering of the data, required for the reconstruction, in the image of the virtual detector is performed in the direction of the projection of spiral segments imaged thereon which are produced by the spiral scanning over a prescribed angular range. The CT unit includes a device for carrying out directional filtering of this type.

    摘要翻译: 一种成像方法是用于具有3D背投影的多层螺旋CT扫描。 对于通过穿透至少一个体素的射线产生的测量和滤波的数据,用于重构至少一个体素的吸收值。 进一步使用CT单元执行该方法。 在该方法中,在虚拟检测器的图像中对在虚拟检测器的图像中进行重建所需要的数据的滤波是在其上成像的螺旋段的投影方向上执行的,这些螺旋段是通过螺旋扫描在规定的角度范围内产生的。 CT单元包括用于执行这种类型的方向滤波的装置。

    Retrospective and/or window-controlled filtering of images for adapting sharpness and noise in computed tomography
    6.
    发明授权
    Retrospective and/or window-controlled filtering of images for adapting sharpness and noise in computed tomography 有权
    用于在计算机断层摄影中适应锐度和噪声的图像的回溯和/或窗口控制滤波

    公开(公告)号:US06901130B2

    公开(公告)日:2005-05-31

    申请号:US10644740

    申请日:2003-08-21

    摘要: A method is for window-controlled filtering of CT images. A CT raw data record is acquired, for example, with the aid of a CT unit or of a C-arc unit. A primary data record is then reconstructed from the CT raw data record by way of, for example, a sharp convolution core and, for example, a narrow slice sensitivity profile. A transfer function is then provided as functional relationship between window width and image sharpness. The image sharpness of the CT image of a selected slice is then automatically calculated, situated in the primary data record, as a function of a selected window width for the selected slice by way of an image processing procedure on the basis of the transfer function.

    摘要翻译: 一种用于CT图像窗口控制滤波的方法。 例如,借助于CT单元或C弧单元获取CT原始数据记录。 然后,通过例如锐利的卷积核心和例如窄的片段灵敏度轮廓,从CT原始数据记录重构主数据记录。 然后提供传递函数作为窗口宽度和图像清晰度之间的功能关系。 然后,通过基于传递函数的图像处理过程,将所选切片的CT图像的图像清晰度自动计算为位于主数据记录中的所选切片的选定窗口宽度的函数。

    Method for production of tomographic slice images of an examination object using at least two X-ray beams at offset angles, and a computed tomography scanner for carrying out this method
    7.
    发明授权
    Method for production of tomographic slice images of an examination object using at least two X-ray beams at offset angles, and a computed tomography scanner for carrying out this method 有权
    使用偏移角度的至少两个X射线束生成检查对象的断层图像的方法,以及用于执行该方法的计算机断层摄影扫描器

    公开(公告)号:US07403588B2

    公开(公告)日:2008-07-22

    申请号:US11213679

    申请日:2005-08-30

    IPC分类号: H05G1/60

    摘要: A method is disclosed for production of tomographic slice images of an examination object using a computed tomography scanner. In order to scan an examination object, at least two X-ray beams are produced, which each are at offset angles and fan out from a focus to an opposite detector and scan the examination object. The scans at least partially overlap. Detector output data which is emitted from the detector elements is measured together with physical orientation data of the beams and is converted to projection data sets. Slice images are then calculated. In order to calculate the complete slice images, data which is redundant from the measured data of the at least two X-ray beams from overlapping projection intervals is used for each complete slice image. The size of the overlap area of the projection data used from the individual X-ray beams is defined before the calculation of the slice images, in order to vary time resolution and image quality.

    摘要翻译: 公开了使用计算机断层摄影扫描仪生产检查对象的断层图像切片图像的方法。 为了扫描检查对象,产生至少两个X射线束,每个X射线束各自以偏移角度从焦点扇出到相对的检测器,并扫描检查对象。 扫描至少部分重叠。 从检测器元件发射的检测器输出数据与波束的物理定向数据一起测量并被转换为投影数据集。 然后计算切片图像。 为了计算完整的切片图像,对于每个完整的切片图像使用从重叠投影间隔的至少两个X射线束的测量数据中冗余的数据。 为了改变时间分辨率和图像质量,在计算切片图像之前定义从各个X射线束使用的投影数据的重叠区域的大小。

    Method for production of tomographic slice images of an examination object using at least two X-ray beams at offset angles, and a computed tomography scanner for carrying out this method
    8.
    发明申请
    Method for production of tomographic slice images of an examination object using at least two X-ray beams at offset angles, and a computed tomography scanner for carrying out this method 有权
    使用偏移角度的至少两个X射线束生成检查对象的断层图像的方法,以及用于执行该方法的计算机断层摄影扫描器

    公开(公告)号:US20060045235A1

    公开(公告)日:2006-03-02

    申请号:US11213679

    申请日:2005-08-30

    摘要: A method is disclosed for production of tomographic slice images of an examination object using a computed tomography scanner. In order to scan an examination object, at least two X-ray beams are produced, which each are at offset angles and fan out from a focus to an opposite detector and scan the examination object. The scans at least partially overlap. Detector output data which is emitted from the detector elements is measured together with physical orientation data of the beams and is converted to projection data sets. Slice images are then calculated. In order to calculate the complete slice images, data which is redundant from the measured data of the at least two X-ray beams from overlapping projection intervals is used for each complete slice image. The size of the overlap area of the projection data used from the individual X-ray beams is defined before the calculation of the slice images, in order to vary time resolution and image quality.

    摘要翻译: 公开了使用计算机断层摄影扫描仪生产检查对象的断层图像切片图像的方法。 为了扫描检查对象,产生至少两个X射线束,每个X射线束各自以偏移角度从焦点扇出到相反的检测器并扫描检查对象。 扫描至少部分重叠。 从检测器元件发射的检测器输出数据与波束的物理定向数据一起测量并被转换为投影数据集。 然后计算切片图像。 为了计算完整的切片图像,对于每个完整的切片图像使用从重叠投影间隔的至少两个X射线束的测量数据中冗余的数据。 为了改变时间分辨率和图像质量,在计算切片图像之前定义从各个X射线束使用的投影数据的重叠区域的大小。

    Method for detecting and visualizing dynamic processes in an object volume
    9.
    发明授权
    Method for detecting and visualizing dynamic processes in an object volume 失效
    用于检测和可视化对象卷中的动态过程的方法

    公开(公告)号:US07277524B2

    公开(公告)日:2007-10-02

    申请号:US11169913

    申请日:2005-06-30

    IPC分类号: A61B6/00

    摘要: A method is disclosed for a multislice computer assisted tomograph, capable of carrying out a spiral scan of an object volume with a pitch p selected to be small enough that each slice of the object volume is multiply detected during the spiral scan. The method includes calculating, using measured data of two temporally consecutive at least one of revolutions and half revolutions, an image of the object volume from which a change inside the object volume between the two temporally consecutive at least one of revolutions and half revolutions is directly visible. An embodiment of the method can permit, for example, the detection and visualization of dynamic processes with an enhanced time resolution.

    摘要翻译: 公开了一种用于多层计算机辅助断层摄影机的方法,其能够对所选择的节距p的物体体积进行螺旋扫描,所述间距p被选择为足够小,使得在螺旋扫描期间对对象体积的每个切片进行乘法检测。 该方法包括使用两个时间上连续的至少一个旋转和半圈的测量数据来计算在两个时间上连续的至少一个转和半转之间的对象体积内的变化直接在其中的对象体积的图像 可见。 该方法的实施例可以允许例如具有增强的时间分辨率的动态过程的检测和可视化。

    Detector for x-ray computer tomography scanners
    10.
    发明授权
    Detector for x-ray computer tomography scanners 有权
    x射线计算机断层扫描仪的检测器

    公开(公告)号:US07238944B2

    公开(公告)日:2007-07-03

    申请号:US10507896

    申请日:2003-03-07

    IPC分类号: G01T1/20

    摘要: A detector for x-ray computer tomography scanners, includes a number of adjacent detector lines extending in an x direction, whereby each detector line is formed from a multitude of adjacent scintillator elements. In order to increase the resolution in the z direction and to simplify the design of the detector, the surface of the scintillator elements are partially covered, which further serves to reduce the size of the aperture in the z direction.

    摘要翻译: 用于x射线计算机断层扫描仪的检测器包括沿x方向延伸的多个相邻的检测器线,由此每个检测器线由多个相邻的闪烁体元件形成。 为了提高z方向的分辨率和简化检测器的设计,闪烁体元件的表面被部分地覆盖,这进一步用于减小孔径在z方向上的尺寸。