Magnetic tracking system for an imaging system
    1.
    发明授权
    Magnetic tracking system for an imaging system 有权
    用于成像系统的磁跟踪系统

    公开(公告)号:US08232798B2

    公开(公告)日:2012-07-31

    申请号:US12065648

    申请日:2006-08-28

    IPC分类号: G01R33/00 G01R33/12 A61B5/05

    摘要: A magnetic tracking system is particularly adapted for a combination with an imaging system, for example with a rotational X ray device. The magnetic tracking system includes pairs of first and second field generators that are disposed on opposite sides of a measuring volume. The first field generators may particularly be attached to a radiation source and the second field generators to a detector of the X ray device. Moreover, the first and second field generators may be constituted by coils with opposite magnetic polarity. Due to the attachment of the field generators to the X ray device, motions of the X ray device do not disturb the magnetic field in a frame of reference fixed to the imaging system.

    摘要翻译: 磁跟踪系统特别适用于与成像系统的组合,例如用旋转X射线装置。 磁跟踪系统包括设置在测量体积的相对侧上的成对的第一和第二场发生器。 第一场发生器可以特别地附接到辐射源并且第二场发生器附接到X射线装置的检测器。 此外,第一和第二场发生器可以由具有相反磁极性的线圈构成。 由于场发生器与X射线装置的连接,X射线装置的运动不会干扰固定在成像系统上的参考系的磁场。

    Magnetic Tracking System for an Imaging System
    2.
    发明申请
    Magnetic Tracking System for an Imaging System 有权
    用于成像系统的磁跟踪系统

    公开(公告)号:US20080204012A1

    公开(公告)日:2008-08-28

    申请号:US12065648

    申请日:2006-08-28

    IPC分类号: A61B5/06 A61B6/00 G01V3/08

    摘要: The invention relates to magnetic tracking system that is particularly adapted for a combination with an imaging system, for example with a rotational X-ray device (10). The magnetic tracking system comprises pairs of first (21a, 22a, 23a) and second (21b, 22b, 23b) field generators that are disposed on opposite sides of a measuring volume (V). The first field generators may particularly be attached to the radiation source (13) and the second field generators (21b, 22b, 23b) to the detector (11) of an X-ray device. Moreover, the first and second field generators may be constituted by coils with opposite magnetic polarity. Due to the attachment of the field generators to the X-ray device, motions of the X-ray device do not disturb the magnetic field (B) in a frame of reference fixed to the imaging system.

    摘要翻译: 本发明涉及一种特别适用于与成像系统的组合的磁跟踪系统,例如用旋转X射线装置(10)。 磁跟踪系统包括设置在测量体积(V)的相对侧上的成对的第一(21a,22a,23a)和第二(21b,22b,23b)场发生器。 第一场发生器可以特别地附接到X射线装置的检测器(11)的辐射源(13)和第二场发生器(21b,22b,23b)。 此外,第一和第二场发生器可以由具有相反磁极性的线圈构成。 由于场发生器与X射线装置的连接,X射线装置的运动不会在固定于成像系统的参考系中干扰磁场(B)。

    Correction of measured values for a magnetic localization device
    3.
    发明授权
    Correction of measured values for a magnetic localization device 有权
    校正磁定位装置的测量值

    公开(公告)号:US07652468B2

    公开(公告)日:2010-01-26

    申请号:US10598013

    申请日:2005-02-11

    IPC分类号: G01B7/0004 G01B7/14 A61B5/05

    摘要: The invention relates to a device and a method for correction of the position (x) of a field sensor (4) measured by means of a magnetic localization device. External field distortions, such as caused for example by the rotating components (1a, 1b) of a computer tomograph (1), are then determined with the help of reference sensor (3) placed at a known position. It is possible to deduce, for example, the current angle of rotation (Φ) of the computer tomograph (1) from the measurement signals of the reference sensor (3). Based on an empirically determined correction (δ(x, Φ)), the uncorrected determined positions (x) of the field sensor (4) can then be converted to corrected positions (x′) in relation to the field distortions. The field generator (2) and the reference sensor (3) are preferably fastened to the gantry in order to eliminate the dependency of the field distortions on an inclination of the gantry.

    摘要翻译: 本发明涉及用于校正通过磁定位装置测量的场传感器(4)的位置(x)的装置和方法。 然后借助放置在已知位置的参考传感器(3)来确定诸如由计算机断层摄影机(1)的旋转部件(1a,1b)引起的外部场失真。 例如,可以从参考传感器(3)的测量信号推断计算机断层摄影机(1)的当前旋转角度(Phi)。 基于经验确定的校正(delta(x,Phi)),场传感器(4)的未校正的确定位置(x)可随后被转换为与场失真相关的校正位置(x')。 场发生器(2)和参考传感器(3)优选地紧固到台架,以消除场失真对台架倾斜的依赖性。

    Motion Compensation in Functional Imaging
    4.
    发明申请
    Motion Compensation in Functional Imaging 有权
    功能成像中的运动补偿

    公开(公告)号:US20080226149A1

    公开(公告)日:2008-09-18

    申请号:US11997410

    申请日:2006-07-27

    IPC分类号: G01T1/164 A61B5/00

    摘要: Medical images are collected in a plurality of cardiac and respiratory phases. The images are transformed into a series of respiratory compensated images with the plurality of cardiac phases, but all at a common respiration phase. The series of respiratory compensated images are transformed into one image at a selected cardiac phase and the common respiration phase. In some embodiments, a database of gated transform matrices is generated. The database may be based on specific patient information or on information generated from a pool of patients. The database may account for respiratory motion, cardiac contractile motion, other physiological motion, or combinations thereof. For a current image to be motion corrected, the transformation matrices collected in the database are used to estimate a current set of transformation matrices accounting for the motion in the current image, and a motion-compensated image is generated based on the current set of transform matrices.

    摘要翻译: 在多个心脏和呼吸相中收集医学图像。 图像被转换成具有多个心脏相的一系列呼吸补偿图像,但都在共同的呼吸阶段。 一系列呼吸补偿图像在选定的心脏相和共同的呼吸期转化为一个图像。 在一些实施例中,生成门控变换矩阵的数据库。 数据库可以基于具体的患者信息或从患者池产生的信息。 数据库可以解释呼吸运动,心脏收缩运动,其他生理运动或其组合。 对于要进行运动校正的当前图像,使用在数据库中收集的变换矩阵来估计当前图像中运动的当前转换矩阵,并且基于当前变换集合生成运动补偿图像 矩阵。

    Correction of Measured Values for a Magnetic Localization Device
    6.
    发明申请
    Correction of Measured Values for a Magnetic Localization Device 有权
    磁定位装置的测量值的校正

    公开(公告)号:US20080157755A1

    公开(公告)日:2008-07-03

    申请号:US10598013

    申请日:2005-02-11

    IPC分类号: G01B7/004

    摘要: The invention relates to a device and a method for correction of the position (x) of a field sensor (4) measured by means of a magnetic localization device. External field distortions, such as caused for example by the rotating components (1a, 1b) of a computer tomograph (1), are then determined with the help of reference sensor (3) placed at a known position. It is possible to deduce, for example, the current angle of rotation (Φ) of the computer tomograph (1) from the measurement signals of the reference sensor (3). Based on an empirically determined correction (δ(x, Φ)), the uncorrected determined positions (x) of the field sensor (4) can then be converted to corrected positions (x′) in relation to the field distortions. The field generator (2) and the reference sensor (3) are preferably fastened to the gantry in order to eliminate the dependency of the field distortions on an inclination of the gantry.

    摘要翻译: 本发明涉及用于校正通过磁定位装置测量的场传感器(4)的位置(x)的装置和方法。 然后借助放置在已知位置的参考传感器(3)来确定诸如由计算机断层摄影机(1)的旋转部件(1a,1b)引起的外部场失真。 例如,可以从参考传感器(3)的测量信号推断计算机断层摄影机(1)的当前旋转角度(Phi)。 基于经验确定的校正(delta(x,Phi)),场传感器(4)的未校正的确定位置(x)可随后被转换为与场失真相关的校正位置(x')。 场发生器(2)和参考传感器(3)优选地紧固到台架,以消除场失真对台架倾斜的依赖性。

    Array of sensor elements
    7.
    发明授权
    Array of sensor elements 有权
    传感器元件阵列

    公开(公告)号:US07161154B2

    公开(公告)日:2007-01-09

    申请号:US10542093

    申请日:2004-01-12

    IPC分类号: G01T1/24

    摘要: The invention relates to an array of sensor elements, wherein the sensor elements are provided to detect electromagnetic radiation such as X-radiation or light, and in doing so to generate a charge signal corresponding to the intensity of the radiation. A sensor element further comprises means enabling the incoming dose of radiation to be determined. In the array, the sensor elements form groups, so that the outputs of all sensor elements of a group are coupled. This on the one hand enables a determination of the dose in these areas, and on the other hand enables images to be formed with a lower resolution in a simple manner, by the combining of output signals from several sensor elements. Furthermore, the sensor elements of one group are preferably arranged “isolated” in such a way that they are surrounded by sensor elements of other groups. Such an array can be used, for example, in an X-ray diagnostic facility or in an optical image recording system.

    摘要翻译: 本发明涉及一种传感器元件阵列,其中提供传感器元件以检测诸如X射线或光的电磁辐射,并且这样做以产生对应于辐射强度的电荷信号。 传感器元件还包括能够确定入射剂量的辐射的装置。 在阵列中,传感器元件形成组,使得组中的所有传感器元件的输出耦合。 这一方面能够确定这些区域中的剂量,另一方面通过组合来自多个传感器元件的输出信号,能够以简单的方式以更低的分辨率形成图像。 此外,一组的传感器元件优选地被布置成“隔离”,使得它们被其他组的传感器元件包围。 这种阵列可以用于例如X射线诊断设备或光学图像记录系统中。

    Flat dynamic radiation detector
    8.
    发明授权
    Flat dynamic radiation detector 失效
    平面动态辐射探测器

    公开(公告)号:US06989539B2

    公开(公告)日:2006-01-24

    申请号:US10189960

    申请日:2002-07-08

    IPC分类号: G01T1/24 G01T1/20 H01J47/02

    CPC分类号: G01T1/2002 G01T1/2018

    摘要: The invention relates to a radiation detector for converting electromagnetic radiation (15) into electric charge carriers. The invention also relates to an X-ray examination apparatus provided with such a radiation detector, and to a method of manufacturing a radiation detector. In order to achieve a small building height of the radiation detector while nevertheless satisfying the same requirements as regards the resetting of the converter arrangement (16, 18) by means of an illumination device (6), it is proposed to provide a supporting layer (8) underneath a glass plate (2a) with a photosensor arrangement (2b), which supporting layer on the one hand provides uniform distribution of the light incident from below and on the other hand imparts the necessary stability to the radiation detector. In a further embodiment it is proposed to provide a scatter foil (14) instead of the supporting layer (8), which scatter foil provided the homogeneous light distribution while the supporting function is taken over by the illumination device.

    摘要翻译: 本发明涉及一种用于将电磁辐射(15)转换成电荷载体的放射线检测器。 本发明还涉及具有这种放射线检测器的X射线检查装置以及制造放射线检测器的方法。 为了实现放射线检测器的小建筑物高度,尽管如此,通过照明装置(6)满足与转换器装置(16,18)的重置相同的要求,提出了一种支撑层( 8)在具有光电传感器布置(2b)的玻璃板(2a)下方,该支撑层一方面提供从下方入射的光的均匀分布,另一方面将放射线检测器的必要稳定性赋予必要的稳定性。 在另一实施例中,提出了代替支撑层(8)的散射箔(14),其中散射箔提供均匀的光分布,而支撑功能由照明装置接管。

    Method of determining the spatial field distribution
    9.
    发明授权
    Method of determining the spatial field distribution 失效
    确定空间场分布的方法

    公开(公告)号:US5644229A

    公开(公告)日:1997-07-01

    申请号:US553230

    申请日:1995-11-07

    CPC分类号: G01R33/10 G01R33/0206

    摘要: The invention relates to a method of determining the spatial field distribution and/or the spatial position of a useful field source, producing said field distribution, by means of a multichannel field measuring device which comprises a plurality of spatially distributed sensors which produce measured values which contain on the one hand useful measured values stemming from the useful field source and on the other hand noise measured values stemming from at least one noise field source, correction values being formed and superposed on the measured values so that compensated measured values are obtained which are compared with similarly compensated, mathematically derived reference values which are produced by a fictitious reference field source by means of the field sensors, the reference field source being determined for which the pattern of compensated reference values corresponds best to the pattern of compensated measured values.

    摘要翻译: 本发明涉及一种确定有用场源的空间场分布和/或空间位置的方法,通过多通道场测量装置产生所述场分布,该多通道场测量装置包括多个空间分布传感器,其产生测量值, 含有源自有用场源的有用测量值,另一方面包含源于至少一个噪声场源的噪声测量值,校正值被形成并重叠在测量值上,使得获得补偿的测量值,其为 与通过场传感器由虚拟参考场源产生的类似补偿的数学导出参考值相比较,确定补偿参考值的图案对应于补偿测量值的图案最佳的参考场源。