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1. 发明授权

US08483363B2 Movable wedge for improved image quality in 3D X-ray imaging 有权
标题翻译：用于3D X射线成像提高图像质量的活动楔块
公开(公告)号：US08483363B2
公开(公告)日：2013-07-09
申请号：US12740366
申请日：2008-11-04
申请人： Matthias Bertram , Jens Wiegert , John F. Vesel , David Sowards-Emmerd , Michael J. Petrilo
发明人： Matthias Bertram , Jens Wiegert , John F. Vesel , David Sowards-Emmerd , Michael J. Petrilo
IPC分类号： G21K3/00
CPC分类号： A61B6/032 , A61B6/037 , A61B6/4035 , G21K1/10
摘要： When generating a 3D image of a subject or patient, a cone beam X-ray source (20a, 20b) is mounted to a rotatable gantry (14) opposite an offset flat panel X-ray detector (22a, 22b). A wedge-shaped attenuation filter (24a, 24b) of suitable material (e.g., aluminum or the like) is adjustably positioned in the cone beam to selectively attenuate the beam as a function of the shape, size, and density of a volume of interest (18) through which X-rays pass in order to maintain X-ray intensity or gain at a relatively constant level within a range of acceptable levels.
摘要翻译：当产生被摄体或患者的3D图像时，锥形束X射线源（20a，20b）安装到与偏移平板X射线检测器（22a，22b）相对的可旋转机架（14）。适当材料（例如铝等）的楔形衰减滤波器（24a，24b）可调节地定位在锥形束中，以根据感兴趣体积的形状，尺寸和密度来选择性地衰减光束（18），以便在可接受水平的范围内使X射线强度或增益保持在相对恒定的水平。

2. 发明申请

US20120104262A1 EVALUATION OF MEASUREMENTS FROM A PIXELATED DETECTOR 审中-公开
标题翻译：从像素检测器测量的评估
公开(公告)号：US20120104262A1
公开(公告)日：2012-05-03
申请号：US12631878
申请日：2009-12-07
申请人： Jens WIEGERT , Klaus Juergen ENGEL
发明人： Jens WIEGERT , Klaus Juergen ENGEL
IPC分类号： G01T1/166 , G01T1/164 , G01T1/00 , A61B6/03 , G01N23/04
CPC分类号： G01N23/046 , G01N2223/419
摘要： The invention relates to a method and a data processing device for evaluating measurement signals provided by a layered, pixelated radiation detector. A generalized detector response function is provided that describes the energy-related crosstalk caused by radiation incident in the d-th neighboring pixel. With the help of this GDR-function, crosstalk effects can be taken into account to achieve a more accurate determination of imaging parameters related to an imaged object. The approach can particularly be used in spectrally resolved, photon counting CT detectors with small, layered pixels.
摘要翻译：本发明涉及一种用于评估由层状像素化辐射检测器提供的测量信号的方法和数据处理装置。提供了广义检测器响应函数，其描述了由第d个相邻像素中入射的辐射引起的与能量有关的串扰。借助该GDR功能，可以考虑串扰效应，以实现与成像对象相关的成像参数的更准确的确定。该方法可以特别用于光谱分辨的具有小分层像素的光子计数CT检测器。

3. 发明申请

US20100308229A1 MOVABLE WEDGE FOR IMPROVED IMAGE QUALITY IN 3D X-RAY IMAGING 有权
标题翻译：在3D X射线成像中改善图像质量的可移动楔形
公开(公告)号：US20100308229A1
公开(公告)日：2010-12-09
申请号：US12740366
申请日：2008-11-04
申请人： Matthias Bertram , Jens Wiegert , John F. Vesel , David Sowards-Emmerd , Michael J. Petrilo
发明人： Matthias Bertram , Jens Wiegert , John F. Vesel , David Sowards-Emmerd , Michael J. Petrilo
IPC分类号： G01T1/166 , G21K1/10 , A61B6/00
CPC分类号： A61B6/032 , A61B6/037 , A61B6/4035 , G21K1/10
摘要： When generating a 3D image of a subject or patient, a cone beam X-ray source (20a, 20b) is mounted to a rotatable gantry (14) opposite an offset flat panel X-ray detector (22a, 22b). A wedge-shaped attenuation filter (24a, 24b) of suitable material (e.g., aluminum or the like) is adjustably positioned in the cone beam to selectively attenuate the beam as a function of the shape, size, and density of a volume of interest (18) through which X-rays pass in order to maintain X-ray intensity or gain at a relatively constant level within a range of acceptable levels.
摘要翻译：当产生被摄体或患者的3D图像时，锥形束X射线源（20a，20b）安装到与偏移平板X射线检测器（22a，22b）相对的可旋转机架（14）。适当材料（例如铝等）的楔形衰减滤波器（24a，24b）可调节地定位在锥形束中，以根据感兴趣体积的形状，尺寸和密度来选择性地衰减光束（18），以便在可接受水平的范围内使X射线强度或增益保持在相对恒定的水平。

4. 发明申请

US20100189376A1 DETECTION VALUES CORRECTION APPARATUS 有权
标题翻译：检测值校正装置
公开(公告)号：US20100189376A1
公开(公告)日：2010-07-29
申请号：US12692786
申请日：2010-01-25
申请人： Matthias BERTRAM , Jens WIEGERT , Steffen Gunther WIESNER
发明人： Matthias BERTRAM , Jens WIEGERT , Steffen Gunther WIESNER
IPC分类号： G06K9/40
CPC分类号： A61B6/032 , A61B6/4441 , A61B6/482 , G06T5/003 , G06T5/20 , G06T2207/10081
摘要： The present invention relates to a detection values correction apparatus for correcting detection values of a projection image of a multi-energy imaging system. A scatter contribution providing unit provides scatter contributions for different intensities, different energies and different locations on the detection surface of the detection values. A scatter contributions combining unit combines scatter contributions for correcting a detection value, wherein the combined scatter contributions represent the contribution of the scatter, which is caused by radiation of the other detection values of the projection image, to the detection value to be corrected and wherein the scatter contributions are combined under consideration of the intensity, energy and location on the detection surface of the other detection values. A correction unit scatter corrects the detection value of the projection image by using the combined scatter contributions.
摘要翻译：本发明涉及一种用于校正多能量成像系统的投影图像的检测值的检测值校正装置。散射贡献提供单元为检测值的检测表面上的不同强度，不同能量和不同位置提供散射贡献。散射贡献组合单元组合用于校正检测值的散射贡献，其中组合散射贡献表示由投影图像的其他检测值的辐射引起的散射对待校正的检测值的贡献，并且其中在考虑其他检测值的检测表面上的强度，能量和位置的情况下组合散射贡献。校正单位散射通过使用组合散射贡献校正投影图像的检测值。

5. 发明申请

US20100187429A1 RADIATION DETECTOR WITH MULTIPLE ELECTRODES ON A SENSITIVE LAYER 有权
标题翻译：辐射探测器与敏感层上的多个电极
公开(公告)号：US20100187429A1
公开(公告)日：2010-07-29
申请号：US12514595
申请日：2007-11-12
申请人： Klaus J. Engel , Guenter Zeitler , Christian Baeumer , Christoph Herrmann , Jens Wiegert , Roland Proksa , Ewald Roessl , Roger Steadman Booker
发明人： Klaus J. Engel , Guenter Zeitler , Christian Baeumer , Christoph Herrmann , Jens Wiegert , Roland Proksa , Ewald Roessl , Roger Steadman Booker
IPC分类号： G01T1/24
CPC分类号： G01T1/2928
摘要： The invention relates to a radiation detector (200), particularly an X-ray detector, which comprises at least one sensitive layer (212) for the conversion of incident photons (X) into electrical signals. A two-dimensional array of electrodes (213) is located on the front side of the sensitive layer (212), while its back side carries a counter-electrode (211). The size of the electrodes (213) may vary in radiation direction (y) for adapting the counting workload of the electrodes. Moreover, the position of the electrodes (213) with respect to the radiation direction (y) provides information about the energy of the detected photons (X).
摘要翻译：本发明涉及一种辐射探测器（200），特别是一种X射线检测器，其包括用于将入射光子（X）转换成电信号的至少一个敏感层（212）。电极（213）的二维阵列位于敏感层（212）的前侧，而其背面承载对电极（211）。电极（213）的尺寸可以在辐射方向（y）上变化，以适应电极的计数工作量。此外，电极（213）相对于辐射方向（y）的位置提供关于检测到的光子（X）的能量的信息。

6. 发明申请

US20080205723A1 Utilizing Physiological Models to Control Functional Acquisitions 有权
标题翻译：利用生理模型来控制功能获取
公开(公告)号：US20080205723A1
公开(公告)日：2008-08-28
申请号：US12090359
申请日：2006-10-06
申请人： Joerg Bredno , Georg Rose , Juergen Weese , Alexandra Groth , Sabine Mollus , Matthias Bertram , Jens Wiegert , Christoph Neukirchen
发明人： Joerg Bredno , Georg Rose , Juergen Weese , Alexandra Groth , Sabine Mollus , Matthias Bertram , Jens Wiegert , Christoph Neukirchen
IPC分类号： A61B6/00
CPC分类号： A61B6/032 , A61B6/481 , A61B6/488 , A61B6/507 , A61B6/542
摘要： Adaptively controlling an imaging system (200, 205) includes constructing model feature characteristics (105) of a process over time, determining parameters and commands (110) for controlling the imaging system for each state of the process, performing data acquisition (120) for the process, extracting current features (130) of the process from the acquired data, matching (135) the current features (130) with the model feature characteristics (105) to determine a state of the process (140), and controlling the data acquisition based on the state of the process to produce optimized data.
摘要翻译：自适应地控制成像系统（200,205）包括构建处理过程的模型特征特征（105），确定参数和命令（110），以控制成像系统对于每个处理状态，执行数据采集（120）该过程从所获取的数据提取过程的当前特征（130），将当前特征（130）与模型特征特征（105）匹配（135）以确定过程（140）的状态，以及控制数据根据进程的状态获取生成优化数据。

7. 发明申请

US20070272871A1 X-Ray Examination Apparatus and Radiation Detector 失效
标题翻译： X射线检查仪和放射检测仪
公开(公告)号：US20070272871A1
公开(公告)日：2007-11-29
申请号：US11568271
申请日：2005-04-25
申请人： Dirk Schafer , Georg Rose , Jens Wiegert , Michael Overdick , Walter Rutten
发明人： Dirk Schafer , Georg Rose , Jens Wiegert , Michael Overdick , Walter Rutten
IPC分类号： G01T1/24
CPC分类号： H04N5/32
摘要： The invention relates to an X-ray detector (1) with an array (2) of sensor elements (21), wherein each row (i) of sensor elements is connected via an addressing line to an addressing unit (5), and wherein each column j) of sensor elements is connected via a read-out line to a read-out unit (3). In the read-out unit (3), sensor signals are preprocessed, for example amplified by amplifiers (31). The detector further comprises a control unit (6) which is adapted to set the gains of said amplifiers (31) for each column (j) and each row (i) individually. The values of the gains may particularly be derived from a priori knowledge, from previous images of the object, or from the image signals of rows that have already been read out.
摘要翻译：本发明涉及具有传感器元件（21）阵列（2）的X射线检测器（1），其中传感器元件的每一行（i）经由寻址线连接到寻址单元（5），并且其中传感器元件的每个列j）经由读出线连接到读出单元（3）。在读出单元（3）中，传感器信号被预处理，例如由放大器（31）放大。检测器还包括控制单元（6），该控制单元适于为每个列（j）和每一行（i）分别设置所述放大器（31）的增益。增益的值可以特别地从先验知识，从对象的先前图像，或者已经被读出的行的图像信号导出。

8. 发明申请

US20120230470A1 ACQUISITION PROTOCOL ASSESSMENT APPARATUS 有权
标题翻译：收购协议评估装置
公开(公告)号：US20120230470A1
公开(公告)日：2012-09-13
申请号：US13501257
申请日：2010-09-16
申请人： Matthias Bertram , Jens Wiegert , Kevin M. Brown
发明人： Matthias Bertram , Jens Wiegert , Kevin M. Brown
IPC分类号： H05G1/64
CPC分类号： G01T1/02 , A61B6/032 , A61B6/544 , G06F19/00
摘要： A method includes generating, via a dose estimator (208), a dose map indicative of an estimated dose deposited for a subject based on acquisition protocol parameter values of an acquisition protocol of an imaging system (100), and generating, via a noise estimator (210), at least one of a noise map indicative of an estimated image noise based on the acquisition protocol parameter values or a contrast-to-noise map based on the noise map and an attenuation map. The method further includes displaying, via a display (216), the dose and noise maps in a human readable format.
摘要翻译：一种方法包括：基于成像系统（100）的获取协议的获取协议参数值，经由剂量估计器（208）生成指示针对对象沉积的估计剂量的剂量图，并且经由噪声估计器（210），基于所述获取协议参数值的噪声映射表示估计图像噪声中的至少一个或基于所述噪声映射的对比噪声映射和衰减映射。该方法还包括经由显示器（216）以人类可读格式显示剂量和噪声图。

9. 发明授权

US08086001B2 Utilizing physiological models to control functional acquisitions 有权
标题翻译：利用生理模型来控制功能收购
公开(公告)号：US08086001B2
公开(公告)日：2011-12-27
申请号：US12090359
申请日：2006-10-06
申请人： Joerg Bredno , Georg Rose , Juergen Weese , Alexandra Groth , Sabine Mollus , Matthias Bertram , Jens Wiegert , Christoph Neukirchen
发明人： Joerg Bredno , Georg Rose , Juergen Weese , Alexandra Groth , Sabine Mollus , Matthias Bertram , Jens Wiegert , Christoph Neukirchen
IPC分类号： G06K9/00
CPC分类号： A61B6/032 , A61B6/481 , A61B6/488 , A61B6/507 , A61B6/542
摘要： Adaptively controlling an imaging system (200, 205) includes constructing model feature characteristics (105) of a process over time, determining parameters and commands (110) for controlling the imaging system for each state of the process, performing data acquisition (120) for the process, extracting current features (130) of the process from the acquired data, matching (135) the current features (130) with the model feature characteristics (105) to determine a state of the process (140), and controlling the data acquisition based on the state of the process to produce optimized data.
摘要翻译：自适应地控制成像系统（200,205）包括构建处理过程的模型特征特征（105），确定参数和命令（110），以控制成像系统对于每个处理状态，执行数据采集（120）该过程从所获取的数据提取过程的当前特征（130），将当前特征（130）与模型特征特征（105）匹配（135）以确定过程（140）的状态，以及控制数据根据进程的状态获取生成优化数据。

10. 发明申请

US20100208964A1 METHOD FOR ELIMINATING SCATTER ARTEFACTS 审中-公开
标题翻译：消除散射器ARTEFACTS的方法
公开(公告)号：US20100208964A1
公开(公告)日：2010-08-19
申请号：US12666820
申请日：2008-06-23
申请人： Jens Wiegert , Matthias Bertram
发明人： Jens Wiegert , Matthias Bertram
IPC分类号： G06K9/00
CPC分类号： G01T1/1648 , G06T11/005
摘要： A method, a computer program as well as a corresponding apparatus for eliminating scatter artefacts that corrupt an image of an object using computed tomography, wherein X-ray projections of the object are at least partially truncated, whereas the method comprises the steps of: reconstructing a truncated image of the object with a limited field of view from the projections; constructing a model of the object in an extended field of view using the truncated image of the object; deriving a scatter estimate by means of Monte-Carlo simulation using the model of object; correcting a projection of the object for X-ray scatter based on the scatter estimate; reconstructing a scatter-corrected image using the corrected projections.
摘要翻译：一种方法，计算机程序以及用于消除使用计算机断层摄影破坏对象的图像的散射伪影的相应装置，其中对象的X射线投影至少部分被截断，而该方法包括以下步骤：重建具有来自投影的有限视野的物体的截断图像; 使用对象的截断图像在扩展视场中构建对象的模型; 通过使用对象模型的蒙特卡罗模拟得出散度估计; 基于散射估计来校正物体对于X射线散射的投影; 使用校正的投影重建散射校正图像。

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