公开(公告)号：US20110293158A1

公开(公告)日：2011-12-01

申请号：US13111159

申请日：2011-05-19

申请人： Stefan Popescu

发明人： Stefan Popescu

IPC分类号： G06K9/40 ,  G06K9/00

CPC分类号： A61B6/5205 ,  A61B5/055 ,  A61B5/7232 ,  A61B6/032 ,  A61B6/037 ,  G06T11/006 ,  G06T2211/424

摘要： A method and an image-reconstruction apparatus are disclosed for reconstructing image data on the basis of measurement data from an imaging system. In at least one embodiment of the process, initial image data, initially reconstructed from the measurement data, is optimized in an iterative optimization method utilizing a substantially edge-maintaining noise regularization term and an additional sparsity regularization term.

摘要翻译： 公开了一种基于来自成像系统的测量数据重建图像数据的方法和图像重建装置。 在该过程的至少一个实施例中，最初从测量数据重建的初始图像数据在利用基本边缘维持噪声正则化项和附加稀疏正则化项的迭代优化方法中被优化。

公开(公告)号：US08005185B2

公开(公告)日：2011-08-23

申请号：US12565989

申请日：2009-09-24

申请人： Stefan Popescu

发明人： Stefan Popescu

IPC分类号： A61B6/00

CPC分类号： A61B6/06 ,  A61B6/4291 ,  A61B6/484 ,  G21K2207/005

摘要： In a method to determine phase and/or amplitude between interfering, adjacent x-ray beams in a detector pixel in a Talbot interferometer for projective and tomographical x-ray phase contrast imaging and/or x-ray dark field imaging, after an irradiation of the examination subject with at least two coherent or quasi-coherent x-rays, an interference of the at least two coherent or quasi-coherent x-rays with the aid of an irradiated phase grating is generated, and the variation of multiple intensity measurements in temporal succession after an analysis grating is determined in relation to known displacements of one of the gratings or of an x-ray source fashioned like a grating, positioned upstream in the beam path, relative to one of the gratings. The integrating intensity measurements ensue during a relative movement—thus not during the standstill—of one of the upstream gratings or of the x-ray source fashioned like a grating or of the examination subject, with known speed behavior over a final time interval of a final distance.

摘要翻译： 在用于投影和断层X射线相位成像和/或x射线暗场成像的Talbot干涉仪中的检测器像素中的相邻X射线束之间确定相位和/或幅度的方法中， 具有至少两个相干或准相干x射线的检查对象，产生借助于照射相位光栅的至少两个相干或准相干x射线的干涉，并且产生多个强度测量的变化 分析光栅之后的时间依赖关系相对于光栅中的一个或相对于光栅中的一个位于光束路径上游的光栅类似于光栅的像素的已知位移来确定。 积分强度测量是在相对运动期间发生的，因此不是在静止的上游光栅之一或像X射线源一样形成像光栅或检查对象，在已知的速度行为在最后的时间间隔 最后距离。

公开(公告)号：US20100246769A1

公开(公告)日：2010-09-30

申请号：US12566858

申请日：2009-09-25

申请人： Christian David ,  Tilman Donath ,  Eckhard Hempel ,  Martin Hoheisel ,  Barbara Matthis ,  Franz Pfeiffer ,  Stefan Popescu

发明人： Christian David ,  Tilman Donath ,  Eckhard Hempel ,  Martin Hoheisel ,  Barbara Matthis ,  Franz Pfeiffer ,  Stefan Popescu

IPC分类号： G21K1/06 ,  G02B5/18 ,  B23P17/00

CPC分类号： A61B6/06 ,  A61B6/03 ,  A61B6/4092 ,  A61B6/4291 ,  A61B6/484 ,  G01T1/00 ,  G21K1/025 ,  G21K1/06 ,  G21K2207/005 ,  Y10T29/49

摘要： In a method for the production of x-ray-optical gratings composed of a first material forming of periodically arranged grating webs and grating openings, a second material is applied by electroplating to fill the grid openings. The electroplating is continued until a cohesive layer of the second material with uniform height is created over the grating webs with this layer having a large absorption coefficient, the absorption properties of the grating structure of the grating are homogenized, so an improvement of the measurement signals that are generated with this grating is improved. Moreover, the mechanical stability of gratings produced in such a manner is improved.

摘要翻译： 在用于生产由形成周期性布置的光栅幅材和光栅开口的第一材料组成的x射线光栅的方法中，通过电镀施加第二材料以填充栅格开口。 电镀继续进行，直到在光栅幅面上形成具有均匀高度的第二材料的内聚层，该层具有大的吸收系数，光栅的光栅结构的吸收特性被均匀化，因此测量信号的改进 改善了用该光栅产生的光栅。 此外，改善了以这种方式制造的光栅的机械稳定性。

公开(公告)号：US07778391B2

公开(公告)日：2010-08-17

申请号：US12478052

申请日：2009-06-04

申请人： Jens Fuerst ,  Stefan Popescu ,  Georg Wittmann

发明人： Jens Fuerst ,  Stefan Popescu ,  Georg Wittmann

IPC分类号： H01J35/00

CPC分类号： H01J3/021 ,  H01J35/065 ,  H01J35/26 ,  H01J35/305

摘要： A field emission cathode has a field emitter and an extraction grid, and the field emitter and the extraction grid can be moved relative to one another. Such a field emission cathode is highly durable and exhibits a longer lifespan. An x-ray tube has a field emission cathode composed of a field emitter and an extraction grid that can be moved relative to one another. Such an x-ray tube is highly durable and exhibits a longer lifespan.

摘要翻译： 场发射阴极具有场发射器和提取栅格，并且场发射器和提取栅格可以相对于彼此移动。 这种场致发射阴极具有高耐久性，寿命更长。 X射线管具有由场发射器和可相对于彼此移动的提取栅格组成的场致发射阴极。 这种X射线管是高度耐用的并且具有更长的寿命。

公开(公告)号：US20100074395A1

公开(公告)日：2010-03-25

申请号：US12565989

申请日：2009-09-24

申请人： Stefan Popescu

发明人： Stefan Popescu

IPC分类号： H05G1/60 ,  G21K1/00 ,  G01N23/083

CPC分类号： A61B6/06 ,  A61B6/4291 ,  A61B6/484 ,  G21K2207/005

摘要： In a method to determine phase and/or amplitude between interfering, adjacent x-ray beams in a detector pixel in a Talbot interferometer for projective and tomographical x-ray phase contrast imaging and/or x-ray dark field imaging, after an irradiation of the examination subject with at least two coherent or quasi-coherent x-rays, an interference of the at least two coherent or quasi-coherent x-rays with the aid of an irradiated phase grating is generated, and the variation of multiple intensity measurements in temporal succession after an analysis grating is determined in relation to known displacements of one of the gratings or of an x-ray source fashioned like a grating, positioned upstream in the beam path, relative to one of the gratings. The integrating intensity measurements ensue during a relative movement—thus not during the standstill—of one of the upstream gratings or of the x-ray source fashioned like a grating or of the examination subject, with known speed behavior over a final time interval of a final distance.

摘要翻译： 在用于投影和断层X射线相位成像和/或x射线暗场成像的Talbot干涉仪中的检测器像素中的相邻X射线束之间确定相位和/或幅度的方法中， 具有至少两个相干或准相干x射线的检查对象，产生借助于照射相位光栅的至少两个相干或准相干x射线的干涉，并且产生多个强度测量的变化 分析光栅之后的时间依赖关系相对于光栅中的一个或相对于光栅中的一个位于光束路径上游的光栅类似于光栅的像素的已知位移来确定。 积分强度测量是在相对运动期间发生的，因此不是在静止的上游光栅之一或像X射线源一样形成像光栅或检查对象，在已知的速度行为在最后的时间间隔 最后距离。

公开(公告)号：US20100020918A1

公开(公告)日：2010-01-28

申请号：US12508713

申请日：2009-07-24

申请人： Stefan Popescu ,  Georg Wittmann

发明人： Stefan Popescu ,  Georg Wittmann

IPC分类号： A61B6/03 ,  A61B6/00

CPC分类号： H01J35/08 ,  A61B6/035 ,  A61B6/4028 ,  H01J2235/086

摘要： An x-ray computed tomography apparatus has one anode ring in a vacuum housing surrounding an examination volume, wherein a focus of an x-ray source revolves on the anode ring to expose the examination volume with an x-ray beam from different directions, and a detector system arranged on a rotating frame that can rotate around a system axis. The detector system serves to detect the x-ray radiation exiting from the examination volume, wherein the detector system and the focus can rotate around the system axis synchronously and in the same rotation direction with a rotation angle offset by 180°. The apparatus also includes a computer to process the measurement values acquired by the detector system. The anode ring can be driven such that it rotates around the system axis, and the rotation direction of the anode ring and the rotation direction of the focus around the system axis are opposite while a rotation of the focus around the system axis ensues.

摘要翻译： X射线计算机断层摄影装置在围绕检查体积的真空壳体中具有一个阳极环，其中x射线源的焦点在阳极环上旋转以利用来自不同方向的X射线束曝光检查体积，并且 布置在可围绕系统轴旋转的旋转框架上的检测器系统。 检测器系统用于检测从检查体积出射的X射线辐射，其中检测器系统和焦点可以以系统轴线同步地旋转并且在相同的旋转方向上以偏移180°的旋转角度旋转。 该装置还包括用于处理由检测器系统获取的测量值的计算机。 可以驱动阳极环使得其围绕系统轴线旋转，并且随着围绕系统轴的焦点旋转，阳极环的旋转方向和围绕系统轴的焦点的旋转方向相反。

公开(公告)号：US07653177B2

公开(公告)日：2010-01-26

申请号：US12213945

申请日：2008-06-26

申请人： Joachim Baumann ,  Christian David ,  Martin Engelhardt ,  Jörg Freudenberger ,  Eckhard Hempel ,  Martin Hoheisel ,  Matthias Honal ,  Thomas Mertelmeier ,  Franz Pfeiffer ,  Stefan Popescu ,  Manfred Schuster

发明人： Joachim Baumann ,  Christian David ,  Martin Engelhardt ,  Jörg Freudenberger ,  Eckhard Hempel ,  Martin Hoheisel ,  Matthias Honal ,  Thomas Mertelmeier ,  Franz Pfeiffer ,  Stefan Popescu ,  Manfred Schuster

IPC分类号： G01N23/20

CPC分类号： G01N23/20 ,  A61B6/484 ,  A61K49/0414 ,  G01N2223/303 ,  G21K2207/005

摘要： A method and a measurement system are disclosed for the noninvasive determination of properties of an object to be examined and to the use of a contrast medium for X-ray phase-contrast measurement. in at least one embodiment of the invention, a mixture (suspension) consisting of a base liquid and a multiplicity of particles contained therein is used, the refractive index of the base liquid being different to the refractive index of the particles.

摘要翻译： 公开了一种方法和测量系统，用于无创测定被检查物体的性质以及使用造影剂进行X射线相位测量。 在本发明的至少一个实施方案中，使用由基础液体和其中包含的多个颗粒组成的混合物（悬浮液），所述基础液体的折射率不同于颗粒的折射率。

公开(公告)号：US07643606B2

公开(公告)日：2010-01-05

申请号：US11674720

申请日：2007-02-14

申请人： Stefan Popescu

发明人： Stefan Popescu

IPC分类号： G01N23/083

CPC分类号： A61B6/4028 ,  A61B6/032 ,  A61B6/4488 ,  H01J35/065 ,  H05G2/001

摘要： An x-ray computed tomography apparatus has a stationary x-ray detector that at least partially surrounds the examination volume in one plane and a stationary device for generation of x-ray radiation. The device for generation of x-ray radiation is composed of an x-ray source that extends annularly around the examination volume over an angle of at least 180° as well as one or more light scanning units with which an x-ray focus moving along the x-ray source can be generated on the x-ray target by scanning of the x-ray source with a light beam, from which x-ray target an x-ray beam is directed through the examination volume onto respective, momentarily opposite detector elements of the stationary x-ray detector. The computed tomography apparatus has one or more light scanning units are arranged and fashioned outside of a central ring axis of the x-ray source such that only an angle range

摘要翻译： X射线计算机断层摄影装置具有至少部分地围绕一个平面中的检查体积和用于产生X射线辐射的固定装置的固定x射线检测器。 用于产生X射线辐射的装置由x射线源组成，X射线源围绕检查体积围绕至少180°的角度环绕延伸，以及一个或多个光扫描单元，X射线焦点随之移动 可以通过用光束扫描x射线源来在X射线靶上产生x射线源，X射线靶从X射线瞄准X射线束穿过检查体积到相应的瞬时相对检测器 固定x射线探测器的元件。 计算机断层摄影装置具有一个或多个光扫描单元被布置和形成在x射线源的中心环轴之外，使得仅对每个光扫描单元仅扫描角度范围<360°而不与环轴交叉。

公开(公告)号：US07636415B2

公开(公告)日：2009-12-22

申请号：US12071108

申请日：2008-02-15

申请人： Stefan Popescu ,  Herbert Bruder ,  Christoph Suess

发明人： Stefan Popescu ,  Herbert Bruder ,  Christoph Suess

IPC分类号： G01N23/00

CPC分类号： A61B6/032 ,  A61B6/405 ,  A61B6/482 ,  A61B6/488 ,  A61B6/5282

摘要： A method and an X-ray CT system are disclosed for producing tomographic pictures with the aid of an X-ray CT system including at least two X-ray sources arranged on a gantry with an angular offset to scan an examination object. In at least one embodiment of the method, in order to determine the scattered radiation distribution, pre-scanning is carried out in which the X-ray sources rotate about the examination object and the dose rate is modulated as a function of the rotation angle, no radiation dose is output over the majority of the revolution, at specific pre-scan angles a dose rate is produced briefly and individually in each case by the X-ray sources of the focus/detector systems, and the received scattered radiation is measured simultaneously by the detectors of the at least one other focus/detector system.

摘要翻译： 公开了一种借助X射线CT系统产生断层图像的方法和X射线CT系统，X射线CT系统包括布置在具有角度偏移的台架上的至少两个X射线源以扫描检查对象。 在该方法的至少一个实施例中，为了确定散射辐射分布，进行预扫描，其中X射线源围绕检查对象旋转，并且剂量率作为旋转角度的函数被调制， 在大部分转速下不产生辐射剂量，在特定的预扫描角度下，通过焦点/检测器系统的X射线源短暂地和单独地产生剂量率，同时测量接收的散射辐射 通过至少一个其它焦点/检测器系统的检测器。

公开(公告)号：US07634047B2

公开(公告)日：2009-12-15

申请号：US12179702

申请日：2008-07-25

申请人： Stefan Popescu ,  Georg Wittmann

发明人： Stefan Popescu ,  Georg Wittmann

IPC分类号： A61B6/00

CPC分类号： A61B6/4028 ,  A61B6/032 ,  A61B6/4014 ,  A61B6/4488 ,  A61B6/482

摘要： A computer tomography system has a stationary x-ray tube, that has an anode ring and at least one cathode ring, that extends through 360° in a system plane perpendicular to a system axis, and a vacuum region that is at least partially delimited by a light-permeable and/or infrared-permeable vacuum window is provided between the anode ring and the at least one cathode ring. A support frame is rotatable around the system axis parallel to the system plane, on which are arranged, in at least one angle position, a system with at least one laser for local activation of electron emission at the at least one cathode ring, and a filter and/or collimator set, and a radiation detector opposite the filter and collimator set.

摘要翻译： 计算机断层摄影系统具有固定的X射线管，其具有阳极环和至少一个阴极环，所述至少一个阴极环在垂直于系统轴线的系统平面中延伸360°，以及真空区域，该真空区域至少部分地由 在阳极环和至少一个阴极环之间提供透光和/或红外透过的真空窗口。 支撑框架可围绕平行于系统平面的系统轴线旋转，系统平面在其至少一个角度位置中布置有具有至少一个激光器的系统，用于在至少一个阴极环处局部激活电子发射，并且 滤波器和/或准直器组，以及与滤波器和准直器组相对的辐射检测器。