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11.发明授权Method for the detection and correction of image distortions in medical imaging 失效用于医学成像中图像失真检测和校正的方法
公开(公告)号：US5872829A
公开(公告)日：1999-02-16
申请号：US824621
申请日：1997-03-27
CPC分类号： A61B6/583 , G01N23/046 , G01N2223/419 , G01N2223/612 , Y10S378/901
摘要： In medical imaging in which a plurality of images of an object under examination are formed, image distortions are corrected using a phantom body which is present in the examination zone of the imaging device when the images of the object are acquired. It is known that image distortions in computer tomography apparatus are caused, for example, by calibration errors, by deviations from the adjusted table displacement speed, or by bending of the table under the weight of the patient. These image distortions are detected in the image of the phantom body in an acquired image and a correction rule is derived for the correction of image distortions in the entire acquired image. The phantom body is in the form of a frame of three elements of X or N shape, two of which extend parallel to one another and perpendicular to the third.
摘要翻译： 在形成检查对象的多个图像的医疗图像中，当获取对象的图像时，使用存在于成像装置的检查区域中的体模体来校正图像失真。 众所周知，计算机断层摄影装置中的图像失真例如通过校准误差，偏离调节的桌子位移速度，或通过患者的重量下的桌子弯曲而引起。 在所获取的图像中，在体模体的图像中检测到这些图像失真，并且导出用于校正整个获取的图像中的图像失真的校正规则。 幻影体是X或N形三个元件的框架的形式，其中两个彼此平行延伸并垂直于第三个元件。
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公开(公告)号：US5761332A
公开(公告)日：1998-06-02
申请号：US613936
申请日：1996-03-11
CPC分类号： G06T17/20
摘要： A method of reconstructing the surface of an object by the boundary element method (BEM), approximately describes a measured, closed object surface (K) by a number of initial triangles, the position of the vertices (E1, E2) of which is known and also the normals (n.sub.1, n.sub.2) to the measured object surface (K) at these vertices (E1, E2), the initial triangles are replaced by sub-triangles, having no more than two vertices corresponding to vertices of an initial triangle (E1, E), in order to enhance the approximative description. An as accurate as possible description of the surface is obtained at little cost in respect of storage time and calculation time in that a curved connecting line (P) is determined through two vertices of the initial triangle (E1, E2) in such a manner that the connecting line (P) extends perpendicularly to the normals (n.sub.1, n.sub.2) at the vertices of the initial triangle (E1, E2), and in that a new vertex of a sub-triangle (E31) is chosen on the curved connecting line (P).
摘要翻译： 通过边界元素法（BEM）重建物体表面的方法近似地通过多个初始三角形描述测量的封闭物体表面（K），其顶点（E1，E2）的位置是已知的 以及在这些顶点（E1，E2）处的测量对象表面（K）的法线（n1，n2），初始三角形由具有对应于初始三角形的顶点的不超过两个顶点的子三角形代替 E1，E），以增强近似描述。 通过在初始三角形（E1，E2）的两个顶点确定弯曲的连接线（P）），在存储时间和计算时间方面以一定的成本获得对表面的准确的描述，其方式如下： 连接线（P）在初始三角形（E1，E2）的顶点处垂直于法线（n1，n2）延伸，并且在弯曲连接线上选择三角形（E31）的新顶点 （P）。
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公开(公告)号：US08232798B2
公开(公告)日：2012-07-31
申请号：US12065648
申请日：2006-08-28
CPC分类号： A61B5/06 , A61B5/05 , A61B5/055 , A61B5/062 , A61B6/4441 , A61B6/547 , A61B8/00 , A61B34/20 , A61B90/36 , A61B2034/2051 , A61B2090/376
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。
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公开(公告)号：US20080204012A1
公开(公告)日：2008-08-28
申请号：US12065648
申请日：2006-08-28
CPC分类号： A61B5/06 , A61B5/05 , A61B5/055 , A61B5/062 , A61B6/4441 , A61B6/547 , A61B8/00 , A61B34/20 , A61B90/36 , A61B2034/2051 , A61B2090/376
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）。
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公开(公告)号：US07170973B2
公开(公告)日：2007-01-30
申请号：US10513276
申请日：2003-04-29
申请人： Thomas Gipp , Hans-Aloys Wischmann , Falko Busse
发明人： Thomas Gipp , Hans-Aloys Wischmann , Falko Busse
IPC分类号： H05G1/64
CPC分类号： A61B6/00
摘要： The invention relates to an X-ray apparatus for forming X-ray images, which apparatus includes an X-ray detector (4) for the conversion of X-rays into electrical signals, a detector exposure unit (5) for the emission of electromagnetic radiation in dependence on how first and second exposure parameters, the value of the first exposure parameters being defined by the acquisition mode whereas the second exposure parameters are not defined by the acquisition mode, and also a control unit (13) for changing and controlling at least one second exposure parameter of the detector exposure unit upon a change of the acquisition mode.
摘要翻译： 本发明涉及一种用于形成X射线图像的X射线装置，该装置包括用于将X射线转换成电信号的X射线检测器（4），用于发射电磁波的检测器曝光单元（5） 依赖于第一和第二曝光参数的辐射，第一曝光参数的值由采集模式定义，而第二曝光参数不是由采集模式定义的，而且控制单元（13）用于改变和控制 在获取模式改变时检测器曝光单元的至少一秒曝光参数。
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公开(公告)号：US20050238139A1
公开(公告)日：2005-10-27
申请号：US10513276
申请日：2003-04-29
申请人： Thomas Gipp , Hans-Aloys Wischmann , Falko Busse
发明人： Thomas Gipp , Hans-Aloys Wischmann , Falko Busse
CPC分类号： A61B6/00
摘要： The invention relates to an X-ray apparatus for forming X-ray images, which apparatus includes an X-ray detector (4) for the conversion of X-rays into electrical signals, a detector exposure unit (5) for the emission of electromagnetic radiation in dependence on how first and second exposure parameters, the value of the first exposure parameters being defined by the acquisition mode whereas the second exposure parameters are not defined by the acquisition mode, and also a control unit (13) for changing and controlling at least one second exposure parameter of the detector exposure unit upon a change of the acquisition mode.
摘要翻译： 本发明涉及一种用于形成X射线图像的X射线装置，该装置包括用于将X射线转换成电信号的X射线检测器（4），用于发射电磁波的检测器曝光单元（5） 依赖于第一和第二曝光参数的辐射，第一曝光参数的值由采集模式定义，而第二曝光参数不是由采集模式定义的，而且控制单元（13）用于改变和控制 在获取模式改变时检测器曝光单元的至少一秒曝光参数。
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公开(公告)号：US20050226382A1
公开(公告)日：2005-10-13
申请号：US10503378
申请日：2003-01-29
申请人： Kai Eck , Hans-Aloys Wischmann
发明人： Kai Eck , Hans-Aloys Wischmann
CPC分类号： A61B6/583
摘要： The invention relates to a method and a device for automatic testing of an X-ray system (2). The doors (5a, 5b) leading to the room (1) in which the X-ray system (2) is installed are monitored by way of sensors (4a, 4b). Furthermore, the state of the room (1) can be monitored by means of further sensors such as video cameras (3). Automatic testing of the X-ray system (2) while utilizing X-rays is started only if and for as long as all doors are closed and the other sensors do not indicate that a safe state is abandoned. The device may also include facilities for automatically positioning a phantom in the beam path. Such facilities may in that case include a phantom which is provided on a flexible foil.
摘要翻译： 本发明涉及一种用于X射线系统（2）的自动测试的方法和装置。 通过传感器（4a，4b）监视通向安装有X射线系统（2）的房间（1）的门（5a，5b）。 此外，房间（1）的状态可以通过诸如摄像机（3）的其他传感器来监视。 只有在所有门都关闭并且其他传感器不表示安全状态被放弃的情况下，才能开始X射线系统（2）的自动测试。 该装置还可以包括用于在光束路径中自动定位体模的设备。 在这种情况下，这样的设施可以包括设置在柔性箔上的体模。
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公开(公告)号：US06954514B2
公开(公告)日：2005-10-11
申请号：US10215714
申请日：2002-08-09
CPC分类号： G01T1/2018
摘要： The invention relates to an X-ray detector for converting electromagnetic radiation, notably X-rays, into electric charge carriers. The invention also relates to a method of operating an X-ray detector and to a method of manufacturing an X-ray detector. The invention furthermore relates to an X-ray examination apparatus which includes an X-ray detector. In order to reduce image artefacts caused by bright burn effects, it is proposed to add a heating device (7) to an X-ray detector (1) for converting electromagnetic radiation, notably X-rays, into electric charge carriers by means of a converter arrangement, which heating device in accordance with the invention is arranged to apply heat to the converter arrangement (2) during operation of the X-ray detector (1).
摘要翻译： 本发明涉及一种用于将电磁辐射（特别是X射线）转换成电荷载体的X射线检测器。 本发明还涉及一种操作X射线检测器的方法和一种制造X射线检测器的方法。 本发明还涉及一种包括X射线检测器的X射线检查装置。 为了减少由明亮的燃烧效应引起的图像伪影，建议将加热装置（7）添加到用于将电磁辐射（特别是X射线）转换成电荷载体的X射线检测器（1），借助于 转换器装置，根据本发明的加热装置被布置成在X射线检测器（1）的操作期间向转换器装置（2）施加热量。
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公开(公告)号：US09414773B2
公开(公告)日：2016-08-16
申请号：US14125182
申请日：2012-06-19
IPC分类号： G06K9/00 , A61B5/11 , A61B6/00 , A61B6/03 , G06T7/00 , G06T7/20 , A61B5/113 , A61B5/00 , A61B5/0456 , A61B5/055
CPC分类号： A61B5/1128 , A61B5/0456 , A61B5/055 , A61B5/113 , A61B5/7207 , A61B6/037 , A61B6/5264 , A61B6/5288 , A61B2576/023 , G06T7/0012 , G06T7/0016 , G06T7/20 , G06T7/246 , G06T2207/10076 , G06T2207/30061
摘要： A respiratory motion determination apparatus determines respiratory motion of a living being (3). A raw data providing unit (2) provides raw data assigned to different times, wherein the raw data are indicative of a structure like the apex of the heart muscle, which is influenced by cardiac motion and by respiratory motion. A reconstruction unit (6) reconstructs intermediate images of the structure from the provided raw data. A structure detection unit (7) detects the structure in the reconstructed intermediate images. A respiratory motion determination unit (10) determines the respiratory motion of the living being based on the structure detected in the reconstructed intermediate images. This allows determining respiratory motion with high accuracy, without relying on, for example, a stable correlation between a tracking signal of an external respiratory gating device and respiratory phases.
摘要翻译： 呼吸运动确定装置确定生物的呼吸运动（3）。 原始数据提供单元（2）提供分配给不同时间的原始数据，其中原始数据表示由心脏运动和呼吸运动影响的心肌顶点的结构。 重建单元（6）从所提供的原始数据重建结构的中间图像。 结构检测单元（7）检测重建的中间图像中的结构。 呼吸运动确定单元（10）基于在重建的中间图像中检测到的结构来确定生物体的呼吸运动。 这允许以高精度确定呼吸运动，而不依赖于例如外部呼吸门控装置的跟踪信号和呼吸相位之间的稳定的相关性。
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公开(公告)号：US08411915B2
公开(公告)日：2013-04-02
申请号：US11997410
申请日：2006-07-27
IPC分类号： G06K9/00
CPC分类号： A61B6/503 , A61B5/113 , A61B5/7289 , A61B6/037 , A61B6/5235 , A61B6/541 , A61B8/0883 , G06F19/00 , G06T7/20 , G06T11/005 , G06T2207/30004 , G06T2211/412
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。
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