Medical imaging method and an associated apparatus
    71.
    发明申请
    Medical imaging method and an associated apparatus 有权
    医学成像方法及相关装置

    公开(公告)号:US20070032735A1

    公开(公告)日:2007-02-08

    申请号:US11498798

    申请日:2006-08-04

    IPC分类号: A61B5/04

    摘要: In the course of an imaging method that is particularly suitable for creating an image data record of the heart and/or the blood vessels of a patient, a series of recording pulses, tuned to the cardiac rhythm, are derived from an ECG signal of the cardiac rhythm of the patient. The imaging is driven in a pulsed fashion from the series of recording pulses. In this case, an initial instant and a final instant of a future recording pulse are determined by taking account of at least one variability parameter characterizing the irregularity of the cardiac rhythm.

    摘要翻译: 在特别适合于创建患者的心脏和/或血管的图像数据记录的成像方法的过程中,调整到心律的一系列记录脉冲是从心电图的ECG信号导出的 患者的心律。 成像以脉冲方式从一系列记录脉冲驱动。 在这种情况下,通过考虑表征心律不规则的至少一个变异性参数来确定未来记录脉冲的初始时刻和最终时刻。

    Imaging tomography apparatus with two acquisition systems in different planes and method for determining position correction values for the planes
    72.
    发明授权
    Imaging tomography apparatus with two acquisition systems in different planes and method for determining position correction values for the planes 有权
    具有不同平面中的两个采集系统的成像断层摄影装置和用于确定平面的位置校正值的方法

    公开(公告)号:US07130369B2

    公开(公告)日:2006-10-31

    申请号:US11166969

    申请日:2005-06-24

    IPC分类号: G01N23/00

    CPC分类号: A61B6/032 A61B6/4014

    摘要: In a tomography apparatus and method for obtaining correction values for two measurement planes, wherein the tomography apparatus an acquisition system disposed in a first measurement plane and a second acquisition system disposed in a second measurement plane that are disposed in the azimuthal direction around a common rotation axis, position correction values for both measurement planes are determined for a substantially constant rotation angle speed of the two acquisition systems using measurement values calculated at a rotation angle position of a reference object that can be introduced into both measurement planes. An artifact-free reconstruction of a slice or volume image can be made using the position correction values.

    摘要翻译: 在用于获得两个测量平面的校正值的断层摄影装置和方法中,其中所述断层摄影装置设置在第一测量平面中的采集系统和设置在第二测量平面中的第二采集系统,所述第二测量平面围绕公共旋转设置在方位角方向 对于两个测量平面的位置校正值,使用在可以被引入到两个测量平面中的参考对象的旋转角度位置处计算的测量值来确定两个采集系统的基本恒定的旋转角度速度。 可以使用位置校正值来进行切片或体积图像的无伪影重建。

    Imaging method for a multi-slice spiral CT scan with 3D reconstruction, and a computed tomography unit for carrying out this method
    73.
    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。

    Method for producing tomograms of a periodically moving object with the aid of a focus detector combination
    74.
    发明授权
    Method for producing tomograms of a periodically moving object with the aid of a focus detector combination 失效
    借助于焦点检测器组合产生周期性移动物体的断层图像的方法

    公开(公告)号:US07020234B2

    公开(公告)日:2006-03-28

    申请号:US11042444

    申请日:2005-01-26

    IPC分类号: A61B6/03 H05G1/10

    摘要: A method is for improving CT image data from a moving examination object, in particular a beating heart. The method includes moving a focus on a circular track about the examination object, wherein scanning data streams, measured in parallel and in a fashion correlated with one another, are collected from a multirow detector. Further, movement data of the examination object are also collected. Angularly complementary data record elements of the same movement phase are retrospectively selected from a number of movement cycles. The data record elements are then reconstructed and reformatted to form incomplete CT images. Subsequently, the incomplete CT images are added up to form complete CT images.

    摘要翻译: 一种用于改善运动检查对象,特别是跳动心脏的CT图像数据的方法。 该方法包括将关于检查对象的圆形轨迹上的焦点移动,其中从多重检测器收集并行测量并以彼此相关的方式测量的扫描数据流。 此外,还收集检查对象的移动数据。 从多个移动周期追溯地选择相同移动阶段的角度互补的数据记录元素。 然后重建数据记录元素并重新格式化以形成不完整的CT图像。 随后,将不完整的CT图像相加,形成完整的CT图像。

    Computed tomography unit having an aperture stop
    75.
    发明申请
    Computed tomography unit having an aperture stop 有权
    具有孔径光阑的计算机断层摄影单元

    公开(公告)号:US20050232390A1

    公开(公告)日:2005-10-20

    申请号:US11100531

    申请日:2005-04-07

    摘要: A computed tomography unit includes at least one X-ray tube, that scans an object in a fashion rotating in a circle or spiral about a z-axis, in combination with an oppositely situated detector having a multiplicity of detector rows. Each detector row includes an aperture Δz in the z-direction, having a multiplicity of detector elements. Between the X-ray tube and detector, a detector diaphragm is arranged that reduces the aperture Δz of the detector rows in the z-direction. The X-ray tube includes a focus, of variable location relative to the X-ray tube and which alternatingly assumes during scanning at least two different positions that have different z-coordinates relative to the X-ray tube R.

    摘要翻译: 计算机断层摄影单元包括至少一个X射线管,其以相对位置的具有多个检测器行的检测器的组合,以围绕z轴旋转的方式扫描物体或旋转物体。 每个检测器行包括沿z方向的孔径Deltaz,具有多个检测器元件。 在X射线管和检测器之间,布置了检测器膜片,其减小了检测器行在z方向上的孔径Deltaz。 X射线管包括相对于X射线管可变位置的焦点,并且在扫描期间交替地假设相对于X射线管R具有不同z坐标的至少两个不同位置。

    Method for producing tomograms of a periodically moving object with the aid of a focus detector combination
    77.
    发明申请
    Method for producing tomograms of a periodically moving object with the aid of a focus detector combination 失效
    借助于焦点检测器组合产生周期性移动物体的断层图像的方法

    公开(公告)号:US20050169424A1

    公开(公告)日:2005-08-04

    申请号:US11042444

    申请日:2005-01-26

    摘要: A method is for improving CT image data from a moving examination object, in particular a beating heart. The method includes moving a focus on a circular track about the examination object, wherein scanning data streams, measured in parallel and in a fashion correlated with one another, are collected from a multirow detector. Further, movement data of the examination object are also collected. Angularly complementary data record elements of the same movement phase are retrospectively selected from a number of movement cycles. The data record elements are then reconstructed and reformatted to form incomplete CT images. Subsequently, the incomplete CT images are added up to form complete CT images.

    摘要翻译: 一种用于改善运动检查对象,特别是跳动心脏的CT图像数据的方法。 该方法包括将关于检查对象的圆形轨迹上的焦点移动,其中从多重检测器收集并行测量并以彼此相关的方式测量的扫描数据流。 此外,还收集检查对象的移动数据。 从多个移动周期追溯地选择相同移动阶段的角度互补的数据记录元素。 然后重建数据记录元素并重新格式化以形成不完整的CT图像。 随后,将不完整的CT图像相加,形成完整的CT图像。

    Detector for x-ray computer tomography scanners
    78.
    发明申请
    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:US20050167601A1

    公开(公告)日:2005-08-04

    申请号:US10507896

    申请日:2003-03-07

    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。

    Method and apparatus for three-dimensional imaging of a moving examination subject, particularly for heart imaging
    79.
    发明授权
    Method and apparatus for three-dimensional imaging of a moving examination subject, particularly for heart imaging 有权
    用于移动检查对象的三维成像的方法和装置,特别是用于心脏成像

    公开(公告)号:US06909769B2

    公开(公告)日:2005-06-21

    申请号:US10126049

    申请日:2002-04-19

    IPC分类号: A61B5/0456 A61B6/00 H05G1/60

    摘要: In a method and apparatus for three-dimensional imaging of a moving examination subject, particularly heart imaging with an examination apparatus having at least one C-arm with a radiation source and a radiation receiver, the C-arm rotates around the examination subject at least once through 180° plus the radiation fan angle during the time span in which a contrast agent is in the examination subject for the registration of the two-dimensional projection images, on the basis of which a three-dimensional image reconstruction ensues.

    摘要翻译: 在用于运动检查对象的三维成像的方法和装置中,特别是使用具有至少一个具有辐射源和辐射接收器的C臂的检查装置的心脏成像技术,C臂至少围绕检查对象旋转 在二维投影图像的登记的检查对象中的造影剂的时间跨度期间,通过180°加上辐射扇角度,基于此进行三维图像重建。

    Method for production of tomographic section images of a periodically moving object with a number of focus detector combinations
    80.
    发明申请
    Method for production of tomographic section images of a periodically moving object with a number of focus detector combinations 失效
    具有多个焦点检测器组合的周期性移动物体的断层图像的生成方法

    公开(公告)号:US20050111622A1

    公开(公告)日:2005-05-26

    申请号:US10991454

    申请日:2004-11-19

    摘要: A method and CT scanner are proposed for the production of tomographic section images, in particular X-ray CT images, of a periodically moving object with periodically changing movement and rest phases. For scanning, a number of focus detector combinations with flat detectors are moved on coaxial spiral paths and movement signals from the moving object are measured at the same time in order to detect movement and rest phases. Further, the time correlation between the movement data and the detector output data stored and axial segment image stacks are then reconstructed independently of one another from sub-segments of the spiral paths using the detector output data from each detector which represent a rest phase of the moving object. Additionally, segment image stacks from the n spiral paths of the n focus detector combinations at the correct time are added up in a complementary angle form and in layers to form 180° tomography section images. The axial segment image stacks are reconstructed in a first step from double-inclined reconstruction planes. Further, in a second step, they are reformatted to produce axial segment image stacks, and detector data from a number of successive movement periods are used for this purpose.

    摘要翻译: 提出了一种方法和CT扫描仪,用于生产具有周期性变化的运动和休息阶段的周期性移动物体的断层图像,特别是X射线CT图像。 为了进行扫描,将多个具有平面检测器的焦点检测器组合在同轴螺旋路径上移动,并且同时测量来自移动物体的运动信号,以便检测运动和休止阶段。 此外,使用来自每个检测器的检测器输出数据,代表休息阶段,运动数据和存储的检测器输出数据和轴段图像堆叠之间的时间相关性由螺旋路径的子段彼此独立地重建, 移动物体 此外,来自n个聚焦检测器组合在正确时间的n个螺旋路径的分段图像堆叠以互补的角度形式和层叠相加以形成180°断层摄影部分图像。 从双重重构平面的第一步重建轴向段图像堆叠。 此外,在第二步骤中,它们被重新格式化以产生轴向段图像堆叠,并且为此目的使用来自多个连续移动周期的检测器数据。