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公开(公告)号：US08320519B2
公开(公告)日：2012-11-27
申请号：US12305492
申请日：2007-06-13
IPC分类号： A61B6/00
CPC分类号： A61B6/5282 , A61B6/032 , A61B6/4014 , A61B6/483 , A61B6/508 , G01T1/2985
摘要： A tomographic apparatus (10) includes at least two x-ray sources (16) that are concurrently driven with different switching patterns to generate uniquely encoded radiation. The tomographic apparatus (10) further includes at least two detectors (20) that each detect primary radiation emitted by its corresponding one of the at least two x-ray sources (16) and cross scatter radiation from at least one of the other at least two x-ray sources (16). Each of the at least two detectors (20) produces an aggregate signal representative of the detected primary and cross scatter radiation. The tomographic apparatus (10) further includes a decoupler (30) which, based on the different switching patterns, identifies at least one signal corresponding to at least one of the at least two x-ray sources (16) within the aggregate signal and associates the identified signal with its corresponding x-ray source (16).
摘要翻译： 断层摄影装置（10）包括至少两个x射线源（16），它们以不同的切换模式同时驱动以产生唯一编码的辐射。 断层摄影装置（10）还包括至少两个检测器（20），每个检测器（20）检测由其至少两个X射线源（16）中的相应一个发射的主要辐射，并且至少另外至少另外一个的交叉散射辐射 两个x射线源（16）。 所述至少两个检测器（20）中的每个检测器（20）产生表示检测到的主要和交叉散射辐射的聚集信号。 断层摄影装置（10）还包括解耦器（30），其基于不同的切换模式，识别对应于聚合信号内的至少两个x射线源（16）中的至少一个的至少一个信号和关联 所识别的信号与其相应的x射线源（16）。
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公开(公告)号：US20110311019A1
公开(公告)日：2011-12-22
申请号：US12305492
申请日：2007-06-13
IPC分类号： A61B6/03
CPC分类号： A61B6/5282 , A61B6/032 , A61B6/4014 , A61B6/483 , A61B6/508 , G01T1/2985
摘要： A tomographic apparatus (10) includes at least two x-ray sources (16) that are concurrently driven with different switching patterns to generate uniquely encoded radiation. The tomographic apparatus (10) further includes at least two detectors (20) that each detect primary radiation emitted by its corresponding one of the at least two x-ray sources (16) and cross scatter radiation from at least one of the other at least two x-ray sources (16). Each of the at least two detectors (20) produces an aggregate signal representative of the detected primary and cross scatter radiation. The tomographic apparatus (10) further includes a decoupler (30) which, based on the different switching patterns, identifies at least one signal corresponding to at least one of the at least two x-ray sources (16) within the aggregate signal and associates the identified signal with its corresponding x-ray source (16).
摘要翻译： 断层摄影装置（10）包括至少两个x射线源（16），它们以不同的切换模式同时驱动以产生唯一编码的辐射。 断层摄影装置（10）还包括至少两个检测器（20），每个检测器（20）检测由其至少两个X射线源（16）中的相应一个发射的主要辐射，并且至少另外至少另外一个的交叉散射辐射 两个x射线源（16）。 所述至少两个检测器（20）中的每个检测器（20）产生表示检测到的主要和交叉散射辐射的聚集信号。 断层摄影装置（10）还包括解耦器（30），其基于不同的切换模式，识别对应于聚合信号内的至少两个x射线源（16）中的至少一个的至少一个信号和关联 所识别的信号与其相应的X射线源（16）。
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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
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。
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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。
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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。
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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
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。
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7.发明申请公开(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。
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公开(公告)号：US08405040B2
公开(公告)日：2013-03-26
申请号：US12853349
申请日：2010-08-10
IPC分类号： G01T1/24
摘要： An imaging detector includes a radiation sensitive region having first and second opposing sides. One of the first or second sides senses impinging radiation. The detector further includes electronics located on the other of the first or second sides of the radiation sensitive region. The electronics includes a thermal controller that regulates a temperature of the imaging detector.
摘要翻译： 成像检测器包括具有第一和第二相对侧的辐射敏感区域。 第一面或第二面中的一个感觉到入射辐射。 检测器还包括位于辐射敏感区域的第一或第二侧另一侧上的电子装置。 电子装置包括一个调节成像检测器温度的热控制器。
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公开(公告)号：US20120250821A1
公开(公告)日：2012-10-04
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： G01N23/04
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。
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公开(公告)号：US08265223B2
公开(公告)日：2012-09-11
申请号：US13003320
申请日：2009-07-14
申请人： Roland Proksa
发明人： Roland Proksa
IPC分类号： A61B6/00
CPC分类号： A61B6/405 , A61B6/032 , A61B6/4014 , A61B6/4035 , A61B6/482 , G01T1/17
摘要： An imaging system includes at least one radiation generating component (210) that alternately emits different radiation that traverse an examination region and a common detector (214) that detects radiation that traverses the examination region and generates a signal indicative thereof. Pulse generating circuitry (304) generates a pulse train, including a plurality of pulses, with a frequency indicative of the signal for the at least one radiation generating component (210) for a sampling interval. Processing electronics (220) determine an approximation of the signal for one of the at least one radiation generating components (210) for the sampling interval based on a number of pulses in the pulse train for the sampling interval and charge of the pulses in the pulse train.
摘要翻译： 成像系统包括交替发射穿过检查区域的不同辐射的至少一个辐射产生部件（210）和检测穿过检查区域的辐射并产生指示其的信号的公共检测器（214）。 脉冲发生电路（304）产生包括多个脉冲的脉冲串，其频率指示用于至少一个辐射产生部件（210）的信号的采样间隔。 处理电子设备（220）基于采样间隔的脉冲序列中的脉冲数量和脉冲中的脉冲的电荷来确定用于采样间隔的至少一个辐射产生部件（210）中的一个的信号的近似值 培养。
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