公开(公告)号：US07492871B2

公开(公告)日：2009-02-17

申请号：US11700140

申请日：2007-01-31

申请人： Stefan Popescu ,  Björn Heismann ,  Eckhard Hempel ,  Christian David ,  Franz Pfeiffer

发明人： Stefan Popescu ,  Björn Heismann ,  Eckhard Hempel ,  Christian David ,  Franz Pfeiffer

IPC分类号： G21K1/00 ,  G21K1/12

CPC分类号： A61B6/00 ,  A61B6/032 ,  A61B6/06 ,  A61B6/4014 ,  A61B6/4028 ,  A61B6/4092 ,  A61B6/4233 ,  A61B6/4266 ,  A61B6/4291 ,  A61B6/4441 ,  A61B6/484 ,  G03B42/02 ,  G21K1/06 ,  G21K2207/005

摘要： A focus/detector system of an X-ray apparatus and a method for generating projective or tomographic phase contrast recordings, are disclosed. In an embodiment of the system, the system includes a beam source equipped with a focus and a focus-side source grating, arranged in the beam path and generates a field of ray-wise coherent X-rays, a grating/detector arrangement having a phase grating and grating lines arranged parallel to the source grating for generating an interference pattern, and a detector having a multiplicity of detector elements arranged flat for measuring the position-dependent radiation intensity behind the phase grating. Finally, the detector elements are formed by a multiplicity of elongate scintillation strips, which are aligned parallel to the grating lines of the phase grating and have a small period, whose integer multiple corresponds to the average large period of the interference pattern which is formed by the phase grating.

摘要翻译： 公开了一种用于产生投影或断层相位对比记录的X射线装置的焦点/检测器系统和方法。 在该系统的一个实施例中，该系统包括配备有焦点和聚焦侧源光栅的光束源，布置在光束路径中并产生射线相干X射线场，光栅/检测器装置具有 平行于源光栅布置的相位光栅和光栅线，用于产生干涉图案;以及检测器，具有平坦布置的多个检测器元件，用于测量相位光栅后面的位置相关的辐射强度。 最后，检测器元件由多个细长的闪烁条形成，它们平行于相位光栅的光栅线并且具有小的周期，其整数倍对应于干涉图案的平均大周期，其由 相位光栅。

公开(公告)号：US07486770B2

公开(公告)日：2009-02-03

申请号：US11700172

申请日：2007-01-31

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

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

IPC分类号： G01N23/04

CPC分类号： G21K1/06 ,  A61B6/032 ,  A61B6/06 ,  A61B6/4092 ,  A61B6/4233 ,  A61B6/4291 ,  A61B6/484 ,  G21K2207/005

摘要： A focus-detector arrangement includes a radiation source with a focus, arranged on a first side of the subject, for generating a fan-shaped or conical beam of rays; at least one X-ray optical grating arranged in the beam path, with at least one phase grating arranged on the opposite second side of the subject in the beam path generating an interference pattern of the X-radiation preferably, in a particular energy range; and an analysis-detector system which detects at least the interference pattern generated by the phase grating in respect of its phase shift with position resolution. According to at least one embodiment of the invention, at least one X-ray optical grating including bars which are free from overhangs form shadows in the beam path of the fan-shaped or conical beam of rays.

摘要翻译： 焦点检测器装置包括布置在被摄体的第一侧上的具有焦点的辐射源，用于产生扇形或锥形的射线束; 布置在所述光束路径中的至少一个X射线光栅，其中至少一个相位光栅布置在所述束路径中的所述对象的相对的第二侧上，优选地在特定能量范围内产生所述X射线的干涉图案; 以及分析检测器系统，其至少检测相位光栅相对于其相移与位置分辨率产生的干涉图案。 根据本发明的至少一个实施例，至少一个X射线光栅，其包括不具有突出端的杆，在扇形或锥形光束的光束路径中形成阴影。

公开(公告)号：US07486763B2

公开(公告)日：2009-02-03

申请号：US11657668

申请日：2007-01-25

申请人： Stefan Popescu

发明人： Stefan Popescu

IPC分类号： A61B6/00

CPC分类号： G01N23/046 ,  A61B6/025 ,  A61B6/027 ,  A61B6/542 ,  G01N2223/419 ,  G01N2223/612

摘要： A method for producing a first shadow image with the aid of an X ray computer tomograph at a prescribed first angular position is disclosed. In order to reduce the applied dose, in at least one embodiment the X ray source is operated in a pulsed fashion only when traversing a prescribed sector including the first angular position. Further, when the prescribed first angular position is reached, a first X ray pulse is generated.

摘要翻译： 公开了一种借助X射线计算机断层摄影机在规定的第一角度位置产生第一阴影图像的方法。 为了减少施加的剂量，在至少一个实施例中，X射线源仅在穿过包括第一角位置的规定扇区时以脉冲方式操作。 此外，当达到规定的第一角度位置时，产生第一X射线脉冲。

公开(公告)号：US20080205446A1

公开(公告)日：2008-08-28

申请号：US11996394

申请日：2006-07-12

申请人： Stefan Popescu ,  Dieter Cherek

发明人： Stefan Popescu ,  Dieter Cherek

IPC分类号： H04J3/24

CPC分类号： A61B6/56

摘要： In a method and a device for data transmission between two components moving relative to each other, a first of the components has a number of transmission segments arranged along the movement direction and a second of the components has receiver units arranged along the movement direction. The data to be transmitted are divided among several transmitter segments for parallel transmission thereof. The data to be transmitted are configured in respective data packets, each having a packet identifier in addition to a data portion. A receiver device connected to the receiver units assembles the respective data portions of the respective received packets in a correct sequence using the respective packet IDs. The need for a position detector for noting the relative position of the transmitter segments and the receiver units is avoided.

摘要翻译： 在用于相对于彼此移动的两个部件之间的数据传输的方法和装置中，第一部件具有沿着移动方向布置的多个传输段，并且部件中的第二部件具有沿着移动方向布置的接收器单元。 要发送的数据被划分成若干发射机段，用于并行传输。 要发送的数据被配置在各自的数据分组中，每个数据分组除了数据部分之外还具有分组标识符。 连接到接收机单元的接收机设备使用相应的分组ID以正确的顺序组合各个接收分组的相应数据部分。 避免了用于注意发射机段和接收机单元的相对位置的位置检测器的需要。

公开(公告)号：US20070189441A1

公开(公告)日：2007-08-16

申请号：US11674720

申请日：2007-02-14

申请人： Stefan Popescu

发明人： Stefan Popescu

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

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°而不与环轴相交。

公开(公告)号：US07240251B2

公开(公告)日：2007-07-03

申请号：US10846257

申请日：2004-05-14

申请人： Stefan Popescu

发明人： Stefan Popescu

IPC分类号： H04L1/24 ,  A61B6/03

CPC分类号： H04L1/24 ,  A61B6/56 ,  H05G1/54

摘要： In a system and an associated method, for data transmission in a computed tomography device, having a data acquisition unit in which measurement data are acquired, converted into a bit stream, and communicated to a transmitter apparatus on a rotating part of the computed tomography device, wherein the transmitter transmits the bit stream to a stationary part of the computed tomography device, and having a receiver apparatus on the stationary part that receives the bit stream from the transmitter apparatus and communicates it to an image reconstruction unit that further processes the bit stream communicated by the receiver apparatus for the reconstruction of the image, the transmitter apparatus and the receiver apparatus each have an error recognition module that monitors the bit stream for errors and signals recognized errors to an error processor that determines the number and rate and/or duration of the recognized errors and stores these in a log data file for an evaluation. Errors thus can be recognized in real time and can be used for error diagnosis without the use of an additional testing tool.

摘要翻译： 在用于计算机断层摄影装置中的数据传输的系统和相关方法中，具有数据获取单元，其中获取测量数据，转换成比特流，并在计算机断层摄影装置的旋转部分上传送到发射机装置 ，其中所述发射机将所述比特流发送到所述计算机断层摄影装置的静止部分，并且在所述静止部分上具有从所述发射机装置接收所述比特流的接收机装置，并将其传送到进一步处理所述比特流的图像重建单元 由接收机装置通信用于图像的重建，发射机装置和接收机装置各自具有错误识别模块，该错误识别模块监视比特流的错误并将识别的错误信号发送到确定数量和速率和/或持续时间的错误处理器 的识别错误并将其存储在用于评估的日志数据文件中。 因此，可以实时识别错误，并且可以在不使用附加测试工具的情况下用于错误诊断。

公开(公告)号：US07027737B2

公开(公告)日：2006-04-11

申请号：US10255976

申请日：2002-09-26

申请人： Stefan Popescu ,  Wolf-Ekkehard Blanz

发明人： Stefan Popescu ,  Wolf-Ekkehard Blanz

IPC分类号： H04B10/00

CPC分类号： A61B6/56 ,  G21K1/06 ,  H04B10/801

摘要： In a method and an arrangement for transmitting data from a rotary part to a stationary part of a system, a light-transmitting channel is formed by an optically reflecting half channel in the stationary part and an optically reflecting half channel in the rotary part, facing each other, with each half channel having a parabolic cross-section and with the half channels being oriented so that the respective focal points and the respective vertices of the two half channels are co-linear. A light emitter is supplied with data to be transmitted and is disposed in the wall of the half channel in the rotary part, and emits modulated light representing the data into the light channel in two opposite directions. At least one of these light beams is detected by a light detector disposed in the wall of the half channel in the stationary part, and the data in the detected beam is then made available for transmission from the stationary part. A light barrier is disposed in the light channel to, generally, block one of the light beams so that, generally, only one beam at a time is detected by the light detectors.

摘要翻译： 在从旋转部向系统的静止部发送数据的方法和装置中，透光通道由固定部的光反射半通道和旋转部的光反射半通道形成，面对 彼此之间，每个半通道具有抛物面的横截面，并且半通道被定向成使得两个半通道的各个焦点和各个顶点是共线的。 光发射器被提供有待传输的数据并且设置在旋转部分中的半通道的壁中，并且在两个相反方向上将表示数据的调制光发射到光通道中。 这些光束中的至少一个被设置在固定部分的半通道的壁中的光检测器检测，然后检测到的光束中的数据可用于从静止部分传输。 光栅设置在光通道中，以通常阻挡光束之一，使得通常，光检测器一次仅检测到一个光束。

公开(公告)号：US20050249326A1

公开(公告)日：2005-11-10

申请号：US11112534

申请日：2005-04-22

申请人： Stefan Popescu ,  Martin Bauer ,  Wolfgang Edler ,  Gerd Neubauer

发明人： Stefan Popescu ,  Martin Bauer ,  Wolfgang Edler ,  Gerd Neubauer

IPC分类号： A61B6/03 ,  A61B6/00 ,  G01N23/00 ,  G01N23/04 ,  G01N23/06 ,  G21K1/12 ,  H04L1/24 ,  H04L12/56 ,  H05G1/60

CPC分类号： G01N23/046 ,  A61B6/586 ,  G01N2223/419

摘要： In a CT system and a method for error-tolerant data transfer between a data acquisition unit and an image reconstruction unit therein, digital data are divided into data packets and are transferred as a data stream from a transmission device to a reception device and are buffered in the reception device for further processing. The data packets are selected such that they respectively contain the data of a segment of a detector row or of a complete detector row of the CT system. Incomplete and/or missing focal paths are detected in the reception device and a storage region is reserved and marked as incorrect for these data packets. The incorrect and/or missing data packets are later interpolated from the data of adjacent detector rows and/or adjacent segments of a detector row and/or successive projections precede or follow the incorrect and/or missing data packets. Missing data packets due to transfer interferences can also be tolerated.

摘要翻译： 在CT系统和数据采集单元与图像重建单元之间的容错数据传输方法中，数字数据被分割为数据分组，并作为数据流从传输设备传送到接收设备，并被缓存 在接收装置中用于进一步处理。 选择数据分组，使得它们分别包含CT系统的检测器行或完整检测器行的段的数据。 在接收设备中检测到不完整和/或丢失的焦点路径，并且保留一个存储区域并将其标记为对于这些数据分组不正确。 稍后从检测器行的相邻检测器行的数据和/或检测器行的相邻段和/或连续的突变之前插入不正确的和/或丢失的数据分组，在不正确的和/或丢失的数据分组之前或之后。 还可以容忍由于传输干扰导致的丢失数据包。

公开(公告)号：US20050058250A1

公开(公告)日：2005-03-17

申请号：US10660395

申请日：2003-09-11

申请人： Stefan Popescu ,  Christoph Sub ,  Heiko Wolf ,  Dietmar Hentschel

发明人： Stefan Popescu ,  Christoph Sub ,  Heiko Wolf ,  Dietmar Hentschel

IPC分类号： A61B6/03 ,  A61B6/00 ,  H05G1/34 ,  H05G1/50

CPC分类号： A61B6/032 ,  A61B6/4035 ,  A61B6/542 ,  A61B6/583

摘要： For automatically controlling or adjusting the X-ray dose when scanning an examination subject in a CT apparatus, a series of reference measurements are initially made by obtaining CT images of respective phantoms having different attenuation. The tube current for each phantom that produces an image of the phantom having an acceptable noise level, and thus an acceptable image quality, is stored in a table. In a subsequent CT scan of an examination subject, the tube voltage is automatically adjusted when irradiating a region of the subject having attenuation comparable to the attenuation of one of the phantoms, so as to employ the tube current when irradiating the examination subject that produced the image of acceptable quality for the comparable phantom.

摘要翻译： 为了在CT装置中扫描检查对象时自动控制或调整X射线剂量，首先通过获得具有不同衰减的各个体模的CT图像来进行一系列参考测量。 用于产生具有可接受噪声水平并因此具有可接受的图像质量的体模的图像的每个体模的管电流存储在表中。 在检查对象的随后的CT扫描中，当照射具有与其中一个体模的衰减相当的衰减的受试者区域时，管电压被自动调整，以便在照射产生 可比较体模可接受质量的形象。

公开(公告)号：US06652143B2

公开(公告)日：2003-11-25

申请号：US09834289

申请日：2001-04-12

申请人： Stefan Popescu

发明人： Stefan Popescu

IPC分类号： G01D1800

CPC分类号： H05G1/00 ,  A61B6/4021 ,  G01N23/046 ,  G01N2223/419 ,  H01J35/14

摘要： In a method and apparatus for dynamically measuring the position, shape, size and intensity distribution of an effective focal spot of an x-ray tube, wherein at least one of these characteristics changes with respect to time, a detector array is provided that is composed of a number of detector elements, and a micro-hole collimator is disposed between the focal spot and the detector array at a distance closer to the focal spot than to the detector array. An x-ray beam emitted from the focal spot passes through an aperture in the micro-hole collimator, and produces a magnified projection of the focal spot on the detector array. The respective electrical signals from the detector elements of the detector array are sampled, and these sampled signals are combined to dynamically measure the position, shape, size and intensity distribution of the focal spot.