公开(公告)号：US20070092055A1

公开(公告)日：2007-04-26

申请号：US11581016

申请日：2006-10-12

申请人： Pau Vives ,  Gunter Lauritsch

发明人： Pau Vives ,  Gunter Lauritsch

IPC分类号： H05G1/60 ,  A61B6/00 ,  G01N23/00 ,  G21K1/12

CPC分类号： G01N23/046 ,  A61B6/507 ,  G01N2223/419 ,  G01N2223/612

摘要： In a method for dynamic computed tomography wherein, a contrast agent is injected into a patient, and a region of interest of the patient where the contrast agent is flowing is then scanned with a computed tomography machine, the computed tomography machine has a ray source and a ray detector. At least the ray source rotates relative to the region of interest of the patient. At a first rotational position of the ray source for a first rotation at a first time point a first image is obtained, and at said first rotational position for at least another rotation at a second time point a second image is obtained, the first and second images being different from one another in view of the flowing contrast agent. At least another rotational position of the ray source for the first rotation at a third time point a third image is obtained, and at the another rotational position for the another rotation at a fourth time point a fourth image is obtained, the third and fourth images being different from one another in view of the flowing contrast agent. A first time interpolation is performed for at least the first and second images at an intermediate time point between the first and second time points, and at least a second time interpolation is performed for the third and fourth images at an intermediate time point between the third and fourth time points. Using at least the first and second time interpolations, a reconstructed image is created.

摘要翻译： 在用于动态计算机断层摄影的方法中，将造影剂注射到患者体内，然后用计算机断层摄影机扫描造影剂流动的患者的感兴趣区域，计算机断层摄影机具有射线源和 射线探测器 至少射线源相对于患者感兴趣的区域旋转。 在第一时间点处的用于第一次旋转的射线源的第一旋转位置处，获得第一图像，并且在所述第一旋转位置处，在第二时间点获得至少另一个旋转，获得第二图像，第一和第二图像 考虑到流动的造影剂，图像彼此不同。 在第三时间点获得用于第一次旋转的光源的至少另一旋转位置的第三图像，并且在第四时间点处的另一旋转的另一旋转位置处获得第四图像，第三图像和第四图像 考虑到流动的造影剂，它们彼此不同。 在第一和第二时间点之间的中间时间点对至少第一和第二图像执行第一次内插，并且在第三和第二时间点之间的中间时间点对第三和第四图像执行至少第二次插值 和第四时间点。 至少使用第一次和第二次插值，创建重建的图像。

公开(公告)号：US20080137936A1

公开(公告)日：2008-06-12

申请号：US11980229

申请日：2007-10-30

申请人： Jan Boese ,  Joachim Hornegger ,  Gunter Lauritsch ,  Marcus Prummer

发明人： Jan Boese ,  Joachim Hornegger ,  Gunter Lauritsch ,  Marcus Prummer

IPC分类号： A61B6/00

CPC分类号： G06T7/20 ,  A61B5/7289 ,  A61B6/032 ,  A61B6/466 ,  A61B6/503 ,  A61B6/5288 ,  G06T2207/30048 ,  Y10S378/901

摘要： X-ray images are recorded of a patient's heart and the heartbeat phase is registered as that is done. The heartbeat phases are coarsely divided into intervals and all X-ray images that have been assigned heartbeat phase from the interval are used for reconstructing a 3D image dataset. The movement fields of the other 3D image datasets are then calculated for one of said 3D image datasets. Movement fields are vector fields indicating the movements of similar structures from one local area to the other. A departure is then made from the coarse interval division, and for each heartbeat phase a movement field is interpolated individually or at least for fairly short intervals from the movement fields determined in advance, which field is used for generating a deformed 3D image dataset that has been imaged onto a reference heartbeat phase. The deformed 3D image datasets are then added together.

摘要翻译： 记录患者心脏的X射线图像，并记录心跳阶段。 将心跳阶段粗略地划分为间隔，并且已经从间隔分配了心跳相位的所有X射线图像用于重建3D图像数据集。 然后针对所述3D图像数据集之一计算其它3D图像数据集的运动场。 运动场是指示类似结构从一个局部区域到另一个局部区域的运动的向量场。 然后从粗间隔划分出发，并且对于每个心跳阶段，移动场单独或至少相对于预先确定的运动场的相当短的间隔进行内插，该场用于生成变形的3D图像数据集，其具有 被成像到参考心跳期。 然后将变形的3D图像数据集加在一起。

公开(公告)号：US20080181367A1

公开(公告)日：2008-07-31

申请号：US12008943

申请日：2008-01-15

申请人： Benno Heigl ,  Stefan Hoppe ,  Joachim Hornegger ,  Gunter Lauritsch

发明人： Benno Heigl ,  Stefan Hoppe ,  Joachim Hornegger ,  Gunter Lauritsch

IPC分类号： G01D18/00

CPC分类号： A61B6/4028 ,  A61B6/032 ,  A61B6/583

摘要： The invention relates to a method for determining gray-scale values for volume elements of bodies to be mapped using an x-ray image recording system. When a body to be mapped is not mapped in full on a single projection image for a rotational position, a second projection image must be made and a virtual projection image derived from the two projection images, this being back-projected onto the volume elements. For calibration the present invention proposes making the same two projection images in each case at a calibration phantom and additionally a further projection image, corresponding to the position and orientation of the virtual projection image. As a result the mathematical relationships between the projection images and the virtual projection image and for the back-projection can be derived.

摘要翻译： 本发明涉及一种用于使用X射线图像记录系统确定要映射的身体的体积元素的灰度值的方法。 当要映射的物体没有完全映射到用于旋转位置的单个投影图像上时，必须制作第二投影图像，并且从两个投影图像得到的虚拟投影图像被反投影到体积元件上。 为了进行校准，本发明提出了在校准模型中的每种情况下制作相同的两个投影图像，另外还提供了与虚拟投影图像的位置和取向相对应的另外的投影图像。 因此，可以推导出投影图像与虚拟投影图像之间的数学关系以及背投影的数学关系。

公开(公告)号：US20080089467A1

公开(公告)日：2008-04-17

申请号：US11890353

申请日：2007-08-06

申请人： Gunter Lauritsch ,  Marcus Pfister

发明人： Gunter Lauritsch ,  Marcus Pfister

IPC分类号： H05G1/02 ,  H05G1/30

CPC分类号： A61B6/102 ,  A61B6/4441 ,  A61B6/4464 ,  A61B6/487 ,  A61B6/583 ,  A61B2090/364

摘要： The invention relates to a method for recording x-ray images with a C-arm system, which comprises an image recording system rotatable about a center of rotation in a recording plane, a number of x-ray fluoroscopic images of an area of interest of an object lying on an object supporting device are recorded at a plurality of angles of rotations by the image recording system, from which one or more cross-sectional images or a three dimensional can be reconstructed. The method is characterized in that the object supporting device is guided synchronously and in a non-colliding manner with the rotation of the image recording system, such that at every angle of rotation at which the recording of an image takes place, the area of interest of the object lies within a beam cone of the x-ray radiation beam of the image recording system.

公开(公告)号：US20060167357A1

公开(公告)日：2006-07-27

申请号：US11330575

申请日：2006-01-12

申请人： Gunter Lauritsch ,  Marcus Pfister

发明人： Gunter Lauritsch ,  Marcus Pfister

IPC分类号： A61B6/00

CPC分类号： A61B5/6814 ,  A61B5/0059 ,  A61B5/0071 ,  A61B5/444 ,  A61B5/445

摘要： The invention relates to a device for making visible a pathological change in a part of a patient's body labeled with a fluorescent dye, the device having: a first selectable light source (11, 17), which emits light in the excitation wavelength range of the fluorescent dye, in order to trigger the emission of light in the emission wavelength range of the fluorescent dye, a second selectable light source, which emits visible light outside the emission wavelength of the fluorescent dye, and a means for selectively switching the first and the second light source on and off.

摘要翻译： 本发明涉及一种用于使被标记有荧光染料的患者身体的一部分可见病理变化的装置，所述装置具有：第一可选择光源（11,17），其在所述荧光染料的激发波长范围内发射光 荧光染料，为了触发在荧光染料的发射波长范围内的光的发射，第二可选择的光源，其在荧光染料的发射波长之外发射可见光，以及用于选择性地切换第一和第 第二光源开关。

公开(公告)号：US20090214098A1

公开(公告)日：2009-08-27

申请号：US12378793

申请日：2009-02-19

申请人： Joachim Hornegger ,  Gunter Lauritsch ,  Marcus Prummer ,  Christopher Rohkohl

发明人： Joachim Hornegger ,  Gunter Lauritsch ,  Marcus Prummer ,  Christopher Rohkohl

IPC分类号： G06K9/00

CPC分类号： A61B6/032 ,  A61B6/4441 ,  A61B6/466 ,  G06T11/005 ,  G06T2211/412

摘要： The invention relates to a method for three-dimensional presentation of a moved structure using a tomographic method, in which a plurality of projection images are recorded from different imaging angles between a start angle with a start node point and an end angle with an end node point by an imaging unit during a number of rotation passes, with three-dimensional image data being able to be reconstructed from the projection images, with the projection images being spaced by a path or an edge. For determining the three-dimensional presentation for each angle of projection only those projection images are selected which minimize the sum of the paths or weighted edges between adjacent projection angles for a gating.

摘要翻译： 本发明涉及一种使用断层摄影方法对移动结构进行三维呈现的方法，其中从与起点节点的开始角度与终端节点的终止角度之间的不同成像角度记录多个投影图像 在多次旋转通过期间由成像单元指向，其中三维图像数据能够从投影图像重建，其中投影图像被路径或边缘间隔开。 为了确定每个投影角度的三维呈现，仅选择这些投影图像，其最小化门控的相邻投影角之间的路径或加权边缘之和。

公开(公告)号：US20090016592A1

公开(公告)日：2009-01-15

申请号：US12217650

申请日：2008-07-08

申请人： Stefan Hoppe ,  Joachim Hornegger ,  Gunter Lauritsch

发明人： Stefan Hoppe ,  Joachim Hornegger ,  Gunter Lauritsch

IPC分类号： G06K9/00 ,  A61B6/00

CPC分类号： A61B6/032 ,  A61B6/027 ,  A61B6/466 ,  A61B6/5258 ,  G06T11/006 ,  G06T2211/421 ,  G06T2211/432

摘要： The invention relates to a method for correcting truncation artifacts in a reconstruction method for computed tomography recordings. The projection images are recorded by an x-ray image detector being extended by determining the attenuation of the radiation outside the projection image for pixels. Non-horizontal filter lines are extended by transaxial and axial artificial extension of the x-ray image detector for the purposes of truncation correction. The truncation correction for non-horizontal filter lines being carried out according to a method from at least one of the following groups: truncation correction takes place regardless of the specific location and orientation of the filter lines; truncation correction takes place as a function of the specific position and orientation of the filter lines, with the filter lines themselves being retained; and truncation correction takes place by introducing new modified filter lines, with filtering taking place along offset artificially extended filter lines.

摘要翻译： 本发明涉及一种用于计算机断层摄影记录的重建方法中的截断伪影的校正方法。 由X射线图像检测器记录投影图像，通过确定像素的投影图像之外的辐射的衰减而被扩展。 非水平滤波器线通过X射线图像检测器的横轴和轴向人造延伸来延伸，用于截断校正。 对于非水平滤波器线的截断校正根据以下组中的至少一个的方法执行：截断校正发生，而不管滤波器线的具体位置和取向如何; 截断校正作为滤波器线的具体位置和取向的函数发生，滤波器线本身被保持; 并且通过引入新的修改的滤波器线进行截断校正，并且沿着偏移人为扩展的滤波器线进行滤波。

公开(公告)号：US20090202034A1

公开(公告)日：2009-08-13

申请号：US12321909

申请日：2009-01-27

申请人： Gunter Lauritsch ,  Alois Nottling ,  Christopher Rohkohl

发明人： Gunter Lauritsch ,  Alois Nottling ,  Christopher Rohkohl

IPC分类号： H05G1/60 ,  A61B5/05

CPC分类号： G06T11/006 ,  G06T2211/412

摘要： The invention relates to a method for three-dimensional image reconstruction of a dynamically moved object from projection data of an imaging device comprising: a) determining a reference volume from the projection data which simulates a similar static object instead of the dynamically moved object; b) assigning the projection data to at least two disjoint consistent subsets, with a volume part reconstruction of the dynamically moved object being undertaken for each subset from projection data assigned to the subsets; c) applying a transformation to the respective volume part reconstructions representing a dynamic movement of the object; d) comparing the volumes of the transformed part reconstructions with a corresponding part of the reference volume, whereby, depending on the comparison, result step c) may be at least partly repeated; and e) summing the volume part reconstructions resulting from step c) and d) to form an overall three-dimensional image reconstruction.

摘要翻译： 本发明涉及一种用于成像设备的投影数据的动态移动对象的三维图像重构的方法，包括：a）从模拟类似静态对象而不是动态移动对象的投影数据确定参考体积; b）将投影数据分配给至少两个不相交的一致性子集，其中通过分配给子集的投影数据对每个子集进行动态移动的对象的体积部分重建; c）对表示所述对象的动态移动的相应体积部分重建应用变换; d）将经转换的部分重建的体积与参考体积的相应部分进行比较，由此，根据比较，结果步骤c）可以至少部分地重复; 以及e）将由步骤c）和d）得到的体积部分重建相加以形成整体三维图像重建。

公开(公告)号：US20080205726A1

公开(公告)日：2008-08-28

申请号：US12070884

申请日：2008-02-21

申请人： Jan Boese ,  Joachim Hornegger ,  Gunter Lauritsch ,  Marcus Prummer

发明人： Jan Boese ,  Joachim Hornegger ,  Gunter Lauritsch ,  Marcus Prummer

IPC分类号： G06K9/00

CPC分类号： G06T19/00 ,  A61B6/4441 ,  A61B6/486 ,  A61B6/503 ,  A61B6/5211 ,  A61B6/5264 ,  A61B6/5288 ,  G06T7/30 ,  G06T2207/10072 ,  G06T2207/10116 ,  G06T2207/10124 ,  G06T2207/30048 ,  G06T2210/41

摘要： The invention relates to the use of 2D projection images which belong to a specific common heart phase. A 3D image data set can be used to generate a reference projection image for the same projection angle for each of the 2D projection images and a differential image can be derived from the reference projection image and 2D projection image. The differential images are back-projected and combined in one 3D differential image data set and, by using this, a deformed 3D image data set is obtained from the previously recorded 3D image data set. Iterations guarantee that the deformed 3D image data set ensues with the smallest possible distance from the 2D projection images for the existing common heart phase. Finally, a 3D image data set is available for a different heart phase other than the reference heart phase and the possibilities for imaging a patient's heart are extended.

摘要翻译： 本发明涉及属于特定共同心脏相位的二维投影图像的应用。 可以使用3D图像数据集来为每个2D投影图像生成用于相同投影角的参考投影图像，并且可以从参考投影图像和2D投影图像导出差分图像。 差分图像被反投影并组合在一个3D差分图像数据集中，并且通过使用它，从先前记录的3D图像数据集获得变形的3D图像数据集。 迭代保证变形的3D图像数据集随着现有共同心脏相位的2D投影图像的最小可能距离而发生。 最后，3D图像数据集可用于除参考心脏相以外的不同心脏相位，并且延长了对患者心脏进行成像的可能性。

公开(公告)号：US20080013675A1

公开(公告)日：2008-01-17

申请号：US11824456

申请日：2007-06-29

申请人： Jan Boese ,  Gunter Lauritsch ,  Thomas Redel

发明人： Jan Boese ,  Gunter Lauritsch ,  Thomas Redel

IPC分类号： A61B6/00

CPC分类号： A61B6/032 ,  A61B6/4441 ,  Y10S378/901

摘要： An object (5) undergoing examination is located within the range of a swiveling axis (4) around which an X-ray source (1) is swiveled during a plurality of mutually discrete swiveling actions. An X-ray detector (2) is swiveled correspondingly so that it will at any time be located diametrically opposite the X-ray source (1) with reference to the swiveling axis (4). Projection datasets (P) of the object (5) undergoing examination are recorded at swiveling angles (α) of the X-ray source (1) during the swiveling actions and stored. Each projection dataset (P) is assigned the respective swiveling angle (α) and a recording instant (t). Together with the swiveling angle (α) assigned to the respective projection dataset (P), each data element of each projection dataset (P) defines a projection line along which an X-ray beam has traveled on its way from the X-ray source (1) to the X-ray detector (2). The projection datasets (P) form recording groups each of which corresponds with the projection datasets (P) that were recorded during a single swiveling action. A computer (15) determines at least one reconstruction group of reconstruction datasets using the projection datasets (P). Each reconstruction dataset contains at least one reconstruction data value assigned to a reconstruction line. Using a temporal interpolation, the computer (15) determines the reconstruction group's reconstruction datasets in such a way that they refer to a uniform reconstruction time. The computer (15) determines a reconstruction of the object (5) undergoing examination using the reconstruction group's reconstruction datasets.

摘要翻译： 正在进行检查的物体（5）位于旋转轴线（4）的范围内，在多个相互离散的旋转动作期间，X射线源（1）绕其旋转。 X射线检测器（2）相应地旋转，使得它将随时相对于旋转轴线（4）与X射线源（1）沿径向相对。 正在进行检查的物体（5）的投影数据集（P）在旋转动作期间以X射线源（1）的旋转角度（α）记录并存储。 每个投影数据集（P）被分配相应的旋转角（α）和记录时刻（t）。 与分配给相应的投影数据集（P）的旋转角（α）一起，每个投影数据集（P）的每个数据元素定义了一条投影线，X射线束沿着该投影线从X射线源 （1）到X射线检测器（2）。 投影数据集（P）形成记录组，每个记录组对应于在单次旋转动作期间记录的投影数据集（P）。 计算机（15）使用投影数据集（P）确定重建数据集的至少一个重建组。 每个重建数据集包含分配给重建线的至少一个重建数据值。 使用时间插值，计算机（15）以这样的方式确定重建组的重建数据集，即它们指的是统一的重建时间。 计算机（15）使用重建组的重建数据集确定正在进行检查的对象（5）的重构。