System and method for intensity modulated x-ray imaging
    52.
    发明公开
    System and method for intensity modulated x-ray imaging 有权
    系统和功能强化模块Röntgenstrahlbildgebung

    公开(公告)号:EP1642529A1

    公开(公告)日:2006-04-05

    申请号:EP05255494.6

    申请日:2005-09-08

    IPC分类号: A61B6/00 G21K3/00 G01T1/29

    摘要: The present invention provides for an x-ray system and method using dynamic automated spatial modulation of an x-ray beam. The system includes an x-ray source (105) transmitting a spatially modulated beam (110) towards an object (120) to be imaged, an x-ray detector (140) receiving the beam and measuring a plurality of intensities across the beam, a beam processor (160) controlling the beam intensity profile, and an image processor (170) producing an output image signal (190). The detector produces a residual image based on at least the intensities measured at the detector. The beam intensity profile may be based on at least some of the following: (a) the residual image from the x-ray detector, (b) current beam intensities, (c) regions on interest in the image, and (d) predicted or measured object motion in the image. The system's output image is based on one or more of said residual image and said beam intensity signal.

    摘要翻译: 本发明提供一种使用x射线束的动态自动空间调制的X射线系统和方法。 该系统包括朝向要被成像的物体(120)传输空间调制光束(110)的x射线源(105),接收该光束并跨越该束测量多个强度的X射线检测器(140) 控制光束强度分布的光束处理器(160)和产生输出图像信号(190)的图像处理器(170)。 检测器至少基于检测器测得的强度产生残留图像。 光束强度分布可以基于以下至少一些:(a)来自X射线检测器的残差图像,(b)当前光束强度,(c)图像中感兴趣的区域,以及(d)预测的 或在图像中测量的物体运动。 系统的输出图像基于所述残留图像和所述光束强度信号中的一个或多个。

    Radiation tomographic apparatus
    54.
    发明公开
    Radiation tomographic apparatus 审中-公开
    Vorrichtung zur Strahlungstomographie

    公开(公告)号:EP1523938A1

    公开(公告)日:2005-04-20

    申请号:EP04255381.8

    申请日:2004-09-03

    发明人: Gohno, Makoto

    摘要: The invention relates to improving the tomographic image quality by preventing the tomographic image contrast from degrading and preventing artifact from occurring even if many scattered radiations occur. An X-ray detection array obtains first detection data using the X-ray detection elements corresponding to an area not shielded by a collimator. In this case, the first detection data is generated by: an X-ray directly irradiated to X-ray detection elements from an X-ray tube through an imaging object; and the X-ray as a scattered radiation from the X-ray tube through the imaging object. Further, the X-ray detection array obtains second detection data using the X-ray detection elements corresponding to an area shielded by the collimator. In this case, the second detection data is generated by the X-ray as a scattered radiation. A central processing unit corrects the first detection data based on the detection data including the first and second detection data. Finally, the central processing unit generates a tomographic image for an imaging area of the imaging object.

    摘要翻译: 本发明涉及通过防止断层图像对比度降低并且即使发生许多散射辐射也能发生伪影,来提高断层图像质量。 X射线检测阵列使用对应于未被准直仪遮蔽的区域的X射线检测元件获得第一检测数据。 在这种情况下,通过以下方式生成第一检测数据:通过成像对象从X射线管直接照射到X射线检测元件的X射线; 以及作为来自X射线管的成像物体的散射辐射的X射线。 此外,X射线检测阵列使用与准直仪屏蔽的区域对应的X射线检测元件来获得第二检测数据。 在这种情况下,第二检测数据是通过作为散射辐射的X射线产生的。 中央处理单元基于包括第一和第二检测数据的检测数据来校正第一检测数据。 最后,中央处理单元生成成像对象的成像区域的断层图像。

    Röntgeneinrichtung
    55.
    发明公开
    Röntgeneinrichtung 有权
    X射线设备

    公开(公告)号:EP1329192A3

    公开(公告)日:2003-12-10

    申请号:EP02027953.5

    申请日:2002-12-13

    发明人: Schmitt, Thomas

    IPC分类号: A61B6/00 A61B6/06

    摘要: Röntgeneinrichtung umfassend eine Strahlungsquelle, einen austauschbaren Strahlungsfilter und eine Flächendosismesseinrichtung umfassend eine Messkammer mit zugeordneter Auswerteeinrichtung zur Ermittlung des Flächendosisprodukts anhand der von der Messkammer gegebenen Messsignale, wobei die Messkammer bezogen auf die Strahlungsrichtung vor dem Filter im Strahlengang angeordnet ist, wobei Mittel zum Erkennen der Art und/oder des Typs des Strahlungsfilters (6) vorgesehen sind, wobei die Auswerteeinrichtung (15) zum Korrigieren des ermittelten Flächendosisprodukts anhand wenigstens eines filterspezifischen Korrekturwerts (a 1 , b 1 , c 1 , ..., d n , e n , f n ) ausgebildet ist.

    Method and apparatus of modulating the filtering of radiation during radiographic imaging
    56.
    发明公开
    Method and apparatus of modulating the filtering of radiation during radiographic imaging 有权
    Method and und Apparat zur StrahlenfiltermodulationwährendderRöntgenaufnahme

    公开(公告)号:EP1356770A1

    公开(公告)日:2003-10-29

    申请号:EP03252477.9

    申请日:2003-04-17

    IPC分类号: A61B6/03 G21K1/10

    摘要: The present invention includes a filtering apparatus for a CT imaging system or equivalently for an x-ray imaging system. The filtering apparatus may be translated along a first axis or a transverse axis to with respect to an attenuation pattern of a subject during an imaging session to reduce radiation exposure to anatomical regions of the subject sensitive to radiation exposure and/or regions from which data is not being acquired

    摘要翻译: 本发明包括用于CT成像系统或等效地用于X射线成像系统的过滤装置。 滤波装置可以在成像会话期间沿着第一轴或横向轴线相对于被摄体的衰减图案平移,以减少对辐射照射敏感的对象的解剖区域的辐射,和/或数据是 未获得

    Method and apparatus of multi-energy imaging
    57.
    发明公开
    Method and apparatus of multi-energy imaging 审中-公开
    Verfahren und VorrichtungfürVielfachenergie-Bilderzeugung

    公开(公告)号:EP1355321A2

    公开(公告)日:2003-10-22

    申请号:EP03252379.7

    申请日:2003-04-15

    发明人: Toth, Thomas L.

    IPC分类号: G21K1/04

    摘要: The present invention is directed to a method and apparatus of multi-energy data acquisition. An imaging system (10) is also provided and includes a number of HF electromagnetic energy filters (90, 96). The filters include at least a first and a second filter (90, 92) wherein the first filter (90) is positioned in a path of HF electromagnetic energy (16) when an HF electromagnetic energy source (14) is energized to a first voltage A and the second filter (92) is positioned in the path of HF electromagnetic energy (16) when the HF electromagnetic energy source (14) is energized to a second voltage B.

    摘要翻译: 本发明涉及多能数据采集的方法和装置。 还提供成像系统(10)并且包括多个HF电磁能量滤波器(90,96)。 滤波器包括至少第一和第二滤波器(90,92),其中当HF电磁能量源(14)被激励到第一电压时,第一滤波器(90)被定位在HF电磁能(16)的路径中 A和第二过滤器(92)位于HF电磁能(14)的路径中,当HF电磁能源(14)被激励到第二电压B

    Röntgeneinrichtung
    58.
    发明公开

    公开(公告)号:EP1329192A2

    公开(公告)日:2003-07-23

    申请号:EP02027953.5

    申请日:2002-12-13

    发明人: Schmitt, Thomas

    IPC分类号: A61B6/00

    摘要: Röntgeneinrichtung umfassend eine Strahlungsquelle, einen austauschbaren Strahlungsfilter und eine Flächendosismesseinrichtung umfassend eine Messkammer mit zugeordneter Auswerteeinrichtung zur Ermittlung des Flächendosisprodukts anhand der von der Messkammer gegebenen Messsignale, wobei die Messkammer bezogen auf die Strahlungsrichtung vor dem Filter im Strahlengang angeordnet ist, wobei Mittel zum Erkennen der Art und/oder des Typs des Strahlungsfilters (6) vorgesehen sind, wobei die Auswerteeinrichtung (15) zum Korrigieren des ermittelten Flächendosisprodukts anhand wenigstens eines filterspezifischen Korrekturwerts (a 1 , b 1 , c 1 , ..., d n , e n , f n ) ausgebildet ist.

    摘要翻译: X射线装置具有辐射源,可互换X射线滤光片(6)和辐射剂量测量装置(13),其中测量室位于X射线滤光片前面,以及相关联的评估装置(15)。 识别X射线过滤器类型,并且评估装置对辐射剂量提供相应的校正。

    FUNCTIONAL RADIOGRAPHIC IMAGING METHODS AND AGENTS
    59.
    发明公开
    FUNCTIONAL RADIOGRAPHIC IMAGING METHODS AND AGENTS 审中-公开
    多功能RADIO图形成像过程和基金

    公开(公告)号:EP1263478A2

    公开(公告)日:2002-12-11

    申请号:EP01920486.6

    申请日:2001-03-15

    IPC分类号: A61K49/04

    摘要: Systems and methods for radiographic imaging of tissue using a radio-opaque imaging agent that in one embodiment accumulates intracellularly in tissue in proportion to its functional, or physiological, activity. In one embodiment, the imaging agent is a cell membrane-permeable, radio-opaque, high affinity ligand for an intracellullar target. The imaging agent is administered to a patient, and after an accumulation interval, radiographic images are acquired. The imaging agent preferentially accumulates in certain types of tissue and increases its radio-opacity. The tissue being examined is transilluminated by X-ray beams with preselected different mean energy spectra, and a separate radiographic image is acquired during transillumination by each beam. An image processing system may perform a weighted combination of the acquired images to produce a single displayed image. The system and method thus provides a functional image displayed with the anatomical detail and spatial resolution of a radiographic image. Functional and anatomical information are displayed in complete registration, facilitating localization of abnormal tissue in relation to nearby anatomical structures.

    Computertomograph mit kegelförmigem Strahlenbündel und helixförmiger Relativbewegung
    60.
    发明公开

    公开(公告)号:EP1177767A2

    公开(公告)日:2002-02-06

    申请号:EP01000347.3

    申请日:2001-08-03

    IPC分类号: A61B6/03

    摘要: Die Erfindung betrifft einen Computertomographen dessen Strahlenquelle ein kegelförmiges Strahlenbündel emittiert und den Untersuchungsbereich entlang einer Trajektorie in Form einer Helix abtasten kann. Die mit der Strahlenquelle verbundene Detektoreinheit besteht dabei aus mehreren räumlich voneinander getrennten und in axialer Richtung gegeneinander versetzten Detektorsegmenten, in denen jedes so angeordnet ist, dass eine Projektion auch die Helix mindestens zwei benachbarter Windungen der Helix bedeckt. Aus den von einer solchen Detektoreinheit akquirierten CT-Daten lässt sich ein CT-Bild mit verbessertem und räumlich homogener verteiltem Signal/Rauschverhältnis rekonstruieren.

    摘要翻译: 计算机断层摄影机具有采样单元,其具有用于测量已经通过物体的检查区域的锥形束束的光束源和相关联的检测器单元。 驱动器产生平行于扫描单元的旋转和位移,使得它们的相对运动是螺旋的。 位移使得螺旋包含根据(2n + 1)p的路径,其中n是大于1的整数,p是两个螺旋绕组之间的轴向位移。 检测器单元具有多个空间分离的检测器段,使得每个检测器段布置成使得其在螺旋上的突起覆盖至少两个相邻的螺旋绕组。 对计算机断层摄影检测器单元进行独立的权利要求。