公开(公告)号：US5502385A

公开(公告)日：1996-03-26

申请号：US255510

申请日：1994-06-08

申请人： Michael H. Kuhn ,  Volker Rasche ,  Roland Proksa

发明人： Michael H. Kuhn ,  Volker Rasche ,  Roland Proksa

IPC分类号： A61B5/055 ,  G01R33/48 ,  G01R33/561 ,  G01R33/563 ,  G01V3/14

CPC分类号： G01R33/563 ,  G01R33/561 ,  G01R33/5617 ,  G01R33/56308

摘要： The invention relates to a method of forming a series of MR images in which, in the presence of a steady magnetic field, sequences comprising at least an RF pulse and a magnetic gradient field which is varied from one sequence to another are continuously applied to the examination zone, from the image signals thus generated there being reconstructed MR images, the oldest MR signals used for the reconstruction of an MR image being replaced upon reconstruction of the next MR image by the respective newly generated MR signals. Low-artefact reproduction of dynamic processes in the examination zone can be achieved by varying the direction of the magnetic gradient field active during the generation of an MR signal from one sequence to another so that the range of the magnetic gradient field directions required for the reconstruction is distributed between the respective newly generated MR signals. The invention also relates to a device for carrying out this method.

摘要翻译： 本发明涉及一种形成一系列MR图像的方法，其中在存在稳定磁场的情况下，连续地将包括从一个序列到另一个序列变化的至少RF脉冲和磁梯度场的序列应用于 检查区域，从由此产生的图像信号存在重建的MR图像，用于通过相应的新产生的MR信号重构下一个MR图像而替换MR图像的最旧的MR信号。 可以通过在从一个序列到另一个序列的MR信号的生成期间改变有效的磁梯度场的方向来实现检查区中的动态过程的低品质再现，使得重建所需的磁梯度场方向的范围 分布在相应的新产生的MR信号之间。 本发明还涉及一种用于执行该方法的装置。

公开(公告)号：US08160337B2

公开(公告)日：2012-04-17

申请号：US11576702

申请日：2005-10-06

申请人： Volker Rasche ,  Roland Proksa

发明人： Volker Rasche ,  Roland Proksa

IPC分类号： G06K9/00

CPC分类号： A61B6/466 ,  A61B6/032 ,  A61B6/4233 ,  A61B6/467 ,  A61B6/469 ,  A61B6/542

摘要： The invention relates to an imaging system and a method for generating high-quality X-ray projections (24) of a patient (1). The system comprises a rotational X-ray device (10), for example a cone-beam CT-gantry (12), and an associated data processing unit (20). During a medical intervention, low-dose raw projections (22) of the patient (1) are continuously generated from different directions. A volume of interest (23) is then reconstructed from said projections (22), from which high-quality virtual projections (24) can be calculated for a display on a monitor (25). The number and direction of said virtual projections (24) can be arbitrarily chosen by the user.

摘要翻译： 本发明涉及一种用于产生患者（1）的高质量X射线投影（24）的成像系统和方法。 该系统包括旋转X射线装置（10），例如锥形束CT机架（12）和相关联的数据处理单元（20）。 在医疗干预期间，从不同方向连续地生成患者（1）的低剂量原始投影（22）。 然后从所述投影（22）重建感兴趣的体积（23），从而可以为监视器（25）上的显示计算高质量的虚拟投影（24）。 所述虚拟投影（24）的数量和方向可以由用户任意选择。

公开(公告)号：US06288542B1

公开(公告)日：2001-09-11

申请号：US09273209

申请日：1999-03-19

申请人： Roland Proksa ,  Volker Rasche ,  Ralph Sinkus

发明人： Roland Proksa ,  Volker Rasche ,  Ralph Sinkus

IPC分类号： G01V300

CPC分类号： G06T17/20 ,  G06T1/0007

摘要： The invention relates to an imaging method for medical examinations, notably MR examinations, in which a set of measurement values is acquired from measuring points which are irregularly distributed in the frequency domain (or in the k-space). Before an image in the space domain is generated from these measurement values by a Fourier transformation, the measurement values must be weighted in dependence on the density of the measuring points in the frequency domain. To this end, the measurement values are weighted in conformity with the magnitude of the Voronoi cells.

摘要翻译： 本发明涉及一种用于医学检查，特别是MR检查的成像方法，其中从在频域（或k空间）中不规则地分布的测量点获取一组测量值。 在通过傅里叶变换从这些测量值生成空间域中的图像之前，必须根据频域中的测量点的密度对测量值进行加权。 为此，测量值与Voronoi单元的大小一致。

公开(公告)号：US20090080751A1

公开(公告)日：2009-03-26

申请号：US11576702

申请日：2005-10-06

申请人： Volker Rasche ,  Roland Proksa

发明人： Volker Rasche ,  Roland Proksa

IPC分类号： G06K9/00

CPC分类号： A61B6/466 ,  A61B6/032 ,  A61B6/4233 ,  A61B6/467 ,  A61B6/469 ,  A61B6/542

摘要： The invention relates to an imaging system and a method for generating high-quality X-ray projections (24) of a patient (1). The system comprises a rotational X-ray device (10), for example a cone-beam CT-gantry (12), and an associated data processing unit (20). During a medical intervention, low-dose raw projections (22) of the patient (1) are continuously generated from different directions. A volume of interest (23) is then reconstructed from said projections (22), from which high-quality virtual projections (24) can be calculated for a display on a monitor (25). The number and direction of said virtual projections (24) can be arbitrarily chosen by the user.

摘要翻译： 本发明涉及一种用于产生患者（1）的高质量X射线投影（24）的成像系统和方法。 该系统包括旋转X射线装置（10），例如锥形束CT机架（12）和相关联的数据处理单元（20）。 在医疗干预期间，从不同方向连续地生成患者（1）的低剂量原始投影（22）。 然后从所述投影（22）重建感兴趣的体积（23），从而可以为监视器（25）上的显示计算高质量的虚拟投影（24）。 所述虚拟投影（24）的数量和方向可以由用户任意选择。

公开(公告)号：US5498961A

公开(公告)日：1996-03-12

申请号：US207529

申请日：1994-03-07

申请人： Michael H. Kuhn ,  Volker Rasche ,  Roland Proksa

发明人： Michael H. Kuhn ,  Volker Rasche ,  Roland Proksa

IPC分类号： A61B5/055 ,  G01R33/54 ,  G01R33/567 ,  G01V3/14

CPC分类号： G01R33/56383

摘要： The invention relates to an MR method for two-dimensional or three-dimensional imaging of an examination zone, in which a set of raw data is measured repeatedly, an image of the examination zone can be reconstructed from each set, and the raw data of a set is acquired with different measurement parameters, and different sets contain raw data acquired with the same measurement parameters. Improved temporal resolution is achieved in that a set of auxiliary data is formed from at least two sets of raw data in order to produce an image representing the examination zone at a selectable instant, the auxiliary data being derived by interpolation from the raw data acquired with each time the same measurement parameters but at different measurement instants, the weight applied to the raw data entering the interpolation being greater as the time interval between the associated measurement instant and the selectable instant is smaller, the image of the examination zone being reconstructed from the set of auxiliary data.

摘要翻译： 本发明涉及一种用于检查区域的二维或三维成像的MR方法，其中重复测量一组原始数据，可以从每个组重建检查区域的图像，并且原始数据 采集不同测量参数的集合，不同的集合包含采用相同测量参数获得的原始数据。 通过从至少两组原始数据形成一组辅助数据，以在可选择的时刻产生表示检查区域的图像，辅助数据通过从用 每次相同的测量参数，但是在不同的测量时刻，施加到进入插值的原始数据的权重随着相关联的测量时刻和可选择时刻之间的时间间隔而变大，则检查区域的图像从 一组辅助数据。

公开(公告)号：US08861674B2

公开(公告)日：2014-10-14

申请号：US13509840

申请日：2010-12-10

申请人： Thomas Koehler ,  Roland Proksa ,  Ewald Roessl

发明人： Thomas Koehler ,  Roland Proksa ,  Ewald Roessl

IPC分类号： A61B6/00 ,  A61B6/03 ,  G01N23/04 ,  G06T11/00

CPC分类号： A61B6/032 ,  A61B6/469 ,  A61B6/542 ,  G01N23/046 ,  G01N2223/419 ,  G06T11/005 ,  Y10S378/901

摘要： The invention relates to a computed tomography apparatus for imaging an object. The computed tomography apparatus comprises a radiation source (2) for generating modulated radiation (4) traversing the object and a detector (6) for generating detection values depending on the radiation (4) after having traversed the object, while the radiation source (2) and the object are moved relative to each other. A weight providing unit (14) provides modulation weights for weighting the detection values depending on the modulation of the radiation (4) and a reconstruction unit (15) reconstructs an image of the object, wherein the detection values are weighted based on the provided modulation weights and an image of the object is reconstructed from the weighted detection values. This can allow to optimize the dose application to the object by modulating the radiation accordingly, wherein the reconstructed images still have a high quality.

摘要翻译： 本发明涉及一种用于对物体成像的计算机断层摄影装置。 计算机断层摄影装置包括用于产生经过物体的调制辐射（4）的辐射源（2）和用于在穿过物体之后产生取决于辐射（4）的检测值的检测器（6），而辐射源 ）并且对象相对于彼此移动。 权重提供单元（14）根据辐射（4）的调制提供用于对检测值进行加权的调制权重，并且重建单元（15）重建对象的图像，其中基于所提供的调制对所述检测值进行加权 从加权检测值重建对象的权重和图像。 这可以通过相应地调节辐射来优化对物体的剂量应用，其中重建的图像仍然具有高质量。

公开(公告)号：US08693621B2

公开(公告)日：2014-04-08

申请号：US12990278

申请日：2009-04-30

申请人： Axel Thran ,  Claas Bontus ,  Peter Forthmann ,  Roland Proksa ,  Ronald B. Sharpless ,  Dominic J. Heuscher ,  Felix Peeters ,  Johannes Bathazar Maria Soetens

发明人： Axel Thran ,  Claas Bontus ,  Peter Forthmann ,  Roland Proksa ,  Ronald B. Sharpless ,  Dominic J. Heuscher ,  Felix Peeters ,  Johannes Bathazar Maria Soetens

IPC分类号： A61B6/03

CPC分类号： A61B6/4447 ,  A61B6/06 ,  A61B6/4021

摘要： A medical imaging system includes a generally stationary gantry (102) and a rotating gantry (106), rotatably supported by the generally stationary gantry (102), that rotates about a longitudinal axis around an examination region. The medical imaging system further includes a radiation source (112) that emits a radiation beam that traverses the examination region. The radiation source (112) is moveably affixed to the rotating gantry (106) so as to translate in a direction of the longitudinal axis with respect to the rotating gantry (106) while scanning a subject in the examination region. The medical imaging system further includes a detector array (120) that detects the radiation beam that traverses the examination region and generates a signal indicative thereof. The detector array (120) is moveably affixed to the rotating gantry (106) so as to move in coordination with the radiation source (112) while scanning the subject in the examination region.

摘要翻译： 医疗成像系统包括大致固定的机架（102）和旋转支架（106），旋转机架（106）由大体上固定的机架（102）可旋转地支撑，围绕检查区域围绕纵向轴线旋转。 医疗成像系统还包括发射穿过检查区域的辐射束的辐射源（112）。 辐射源（112）可移动地固定到旋转机架（106）上，以便在扫描检查区域中的被检体的同时相对于旋转台架（106）在纵向轴线的方向上平移。 医疗成像系统还包括检测器阵列（120），其检测穿过检查区域的辐射束并产生指示其的信号。 检测器阵列（120）可移动地固定到旋转机架（106），以在扫描检查区域中的对象时与辐射源（112）协调地移动。

公开(公告)号：US20140005971A1

公开(公告)日：2014-01-02

申请号：US14005041

申请日：2012-03-02

申请人： Ewald Roessl ,  Roland Proksa

发明人： Ewald Roessl ,  Roland Proksa

IPC分类号： G01T7/00

CPC分类号： G01T7/005 ,  G06T11/005 ,  G06T2211/408

摘要： A method for processing projection data in the projection domain includes receiving the projection data. The projection data is generated by a spectral detector and includes two or more independent energy-resolved measurements in which at least one of the two or more measurements has first photon statistics. The method further includes generating a de-noised measurement in electronic format for the at least one of the two or more measurements having the first photon statistics. The de-noised measurement has second photon statistics which are better than the first photon statistics.

摘要翻译： 用于处理投影域中的投影数据的方法包括接收投影数据。 投影数据由光谱检测器产生，并且包括两个或多个独立的能量分辨测量，其中两个或更多个测量中的至少一个具有第一光子统计。 该方法还包括以电子格式生成具有第一光子统计量的两个或多个测量中的至少一个的去噪测量。 去噪测量具有比第一光子统计更好的第二光子统计。

公开(公告)号：US20130308848A1

公开(公告)日：2013-11-21

申请号：US13981610

申请日：2012-01-25

申请人： Roland Proksa ,  Gerhard Martens

发明人： Roland Proksa ,  Gerhard Martens

IPC分类号： G01N23/04 ,  G06T11/00

CPC分类号： G01N23/04 ,  A61B6/032 ,  A61B6/06 ,  A61B6/4042 ,  A61B6/4241 ,  A61B6/5205 ,  A61B6/5258 ,  G01N23/046 ,  G01N2223/419 ,  G06T11/003

摘要： The invention relates to a detection values processing apparatus. Energy-dependent detection values are provided, which are indicative of polychromatic radiation (4) after having traversed an examination zone (5). The radiation is filtered by a filter (15) which comprises K-edge filter material. A component decomposition technique is applied to the detection values for determining K-edge attenuation values being first component attenuation values, which are indicative of an attenuation caused by the K-edge filter material, and additional component attenuation values, which are indicative of an attenuation caused by additional components of the examination zone, wherein an image of the examination zone is reconstructed from the additional component attenuation values. An image can therefore be reconstructed, which is not adversely affected by the filter, because the K-edge attenuation values are not used for reconstructing the image. This can improve the quality of the reconstructed image.

摘要翻译： 本发明涉及一种检测值处理装置。 提供依赖于能量的检测值，这些检测值指示经过检查区域（5）之后的多色辐射（4）。 辐射由包括K边缘过滤材料的过滤器（15）过滤。 分量分解技术被应用于用于确定作为表示由K边缘滤波器材料引起的衰减的第一分量衰减值的K边缘衰减值的检测值以及指示衰减的附加分量衰减值 由检查区域的附加组件引起，其中从附加分量衰减值重建检查区域的图像。 因此，由于K边缘衰减值不用于重建图像，因此可以重构图像，其不受滤波器的不利影响。 这可以提高重建图像的质量。

公开(公告)号：US20130251286A1

公开(公告)日：2013-09-26

申请号：US13990450

申请日：2011-11-25

申请人： Bernhard Johannes Brendel ,  Thomas Koehler ,  Holger Schmitt ,  Rolf Dieter Bippus ,  Roland Proksa

发明人： Bernhard Johannes Brendel ,  Thomas Koehler ,  Holger Schmitt ,  Rolf Dieter Bippus ,  Roland Proksa

IPC分类号： G06T11/00

CPC分类号： G06T11/003 ,  G06T11/006 ,  G06T2211/424

摘要： A method includes reconstructing measured projection data using an iterative statistical reconstruction algorithm that reduces image artifact caused by differences in variances in projections of the measured projection data used to update a voxel of the image for one or more voxels of the image. A reconstructor includes a processor that reconstructs measured projection data using an iterative statistical reconstruction algorithm that reduces or mitigates image artifact caused by differences in variances in projections used to update a voxel of the image for one or more voxels of the image. A computer readable storage medium encoded with computer executable instructions, which, when executed by a processor of a computer, cause the processor to: reduce image artifact caused by differences in variances in projections used to update a voxel of an image for one or more voxels of the image using an iterative statistical reconstruction algorithm.

摘要翻译： 一种方法包括使用迭代统计重建算法来重建测量的投影数据，所述迭代统计重构算法减少由用于更新图像的一个或多个体素的图像的体素的测量投影数据的投影方差的差异引起的图像伪像。 重构器包括使用迭代统计重建算法来重建测量的投影数据的处理器，其减少或减轻由用于更新图像的一个或多个体素的图像的体素的投影方差的差异引起的图像伪像。 一种用计算机可执行指令编码的计算机可读存储介质，其在由计算机的处理器执行时使处理器能够：减少由用于更新一个或多个体素的图像的体素的投影差异的差异引起的图像伪像 的图像使用迭代统计重建算法。