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1. 发明申请

US20100270472A1 DIGITAL PULSE PROCESSING FOR MULTI-SPECTRAL PHOTON COUNTING READOUT CIRCUITS 有权
标题翻译：用于多光子计数读数电路的数字脉冲处理
公开(公告)号：US20100270472A1
公开(公告)日：2010-10-28
申请号：US12665558
申请日：2008-05-23
申请人： Roand Proksa , Jens-Peter Schlomka , Ewald Roessl , Tuvia Liran , Aviv Marks
发明人： Roand Proksa , Jens-Peter Schlomka , Ewald Roessl , Tuvia Liran , Aviv Marks
IPC分类号： G01T1/17
CPC分类号： G01T1/171
摘要： An apparatus includes a local minimum identifier (408) that identifies a local minimum between overlapping pulses in a signal, wherein the pulses have amplitudes that are indicative of the energy of successively detected photons from a multi-energetic radiation beam by a radiation sensitive detector, and a pulse pile-up error corrector (232) that corrects, based on the local minimum, for a pulse pile-up energy-discrimination error when energy-discriminating the pulses using at least two thresholds corresponding to different energy levels. This technique may reduce spectral error when counting photons at a high count rate.
摘要翻译：一种装置包括识别信号中重叠脉冲之间的局部最小值的局部最小标识符（408），其中脉冲具有指示由辐射敏感检测器从多能辐射束连续检测到的光子的能量的幅度，以及脉冲堆积误差校正器（232），其基于局部最小值来校正针对对应于不同能级的至少两个阈值对脉冲进行能量鉴别的脉冲堆积能量鉴别误差。当以高计数率计数光子时，该技术可能降低光谱误差。

2. 发明授权

US08338791B2 Digital pulse processing for multi-spectral photon counting readout circuits 有权
标题翻译：数字脉冲处理用于多光谱光子计数读出电路
公开(公告)号：US08338791B2
公开(公告)日：2012-12-25
申请号：US12665558
申请日：2008-05-23
申请人： Roland Proksa , Jens-Peter Schlomka , Ewald Roessl , Tuvia Liran , Aviv Marks
发明人： Roland Proksa , Jens-Peter Schlomka , Ewald Roessl , Tuvia Liran , Aviv Marks
IPC分类号： G01J5/02
CPC分类号： G01T1/171
摘要： An apparatus includes a local minimum identifier (408) that identifies a local minimum between overlapping pulses in a signal, wherein the pulses have amplitudes that are indicative of the energy of successively detected photons from a multi-energetic radiation beam by a radiation sensitive detector, and a pulse pile-up error corrector (232) that corrects, based on the local minimum, for a pulse pile-up energy-discrimination error when energy-discriminating the pulses using at least two thresholds corresponding to different energy levels. This technique may reduce spectral error when counting photons at a high count rate.
摘要翻译：一种装置包括识别信号中重叠脉冲之间的局部最小值的局部最小标识符（408），其中脉冲具有指示由辐射敏感检测器从多能辐射束连续检测到的光子的能量的幅度，以及脉冲堆积误差校正器（232），其基于局部最小值来校正针对对应于不同能级的至少两个阈值对脉冲进行能量鉴别的脉冲堆积能量鉴别误差。当以高计数率计数光子时，该技术可能降低光谱误差。

3. 发明授权

US08442184B2 Spectral CT 有权
标题翻译：光谱CT
公开(公告)号：US08442184B2
公开(公告)日：2013-05-14
申请号：US12996985
申请日：2009-06-01
申请人： Peter Forthmann , Udo Van Stevendaal , Ewald Roessl , Michael Grass , Roland Proksa , Jens-Peter Schlomka
发明人： Peter Forthmann , Udo Van Stevendaal , Ewald Roessl , Michael Grass , Roland Proksa , Jens-Peter Schlomka
IPC分类号： A61B6/00
CPC分类号： A61B6/405 , A61B6/032 , A61B6/4014 , A61B6/4035 , A61B6/4042 , A61B6/4241 , A61B6/482
摘要： An imaging system includes a radiation source (106, T1, T2, T3) that rotates about an examination region and emits radiation that traverses the examination region. The radiation source (106, T1, T2, T3) emits radiation having an energy spectrum that is selectively alternately switched between at least two different energy spectra during an imaging procedure. The system further includes an energy-resolving detector array (116, D1, D2, D3) that detects radiation traversing the examination region. The energy-resolving detector array (116, D1, D2, D3) resolves the detected radiation over at least two different energy ranges and produces energy-resolved output signals as a function of both emission energy spectrum and energy range. The system further includes a reconstructor (126) that performs a spectral reconstruction of the energy-resolved output signals. In another embodiment, the detector array (116) includes a photon-counting detector array (116).
摘要翻译：成像系统包括围绕检查区域旋转并且发射穿过检查区域的辐射的辐射源（106，T1，T2，T3）。辐射源（106，T1，T2，T3）发射具有在成像过程期间在至少两个不同能量谱之间选择性交替切换的能谱的辐射。该系统还包括检测穿过检查区域的辐射的能量分辨检测器阵列（116，D1，D2，D3）。能量分辨检测器阵列（116，D1，D2，D3）通过至少两个不同的能量范围来解析检测到的辐射，并且产生作为发射能量谱和能量范围的函数的能量分辨的输出信号。该系统还包括执行能量分辨输出信号的频谱重建的重建器（126）。在另一个实施例中，检测器阵列（116）包括光子计数检测器阵列（116）。

4. 发明申请

US20110096892A1 SPECTRAL CT 有权
标题翻译：光谱CT
公开(公告)号：US20110096892A1
公开(公告)日：2011-04-28
申请号：US12996985
申请日：2009-06-01
申请人： Peter Forthmann , Udo Van Stevendaal , Ewald Roessl , Michael Grass , Roland Proksa , Jens-Peter Schlomka
发明人： Peter Forthmann , Udo Van Stevendaal , Ewald Roessl , Michael Grass , Roland Proksa , Jens-Peter Schlomka
IPC分类号： H05G1/60
CPC分类号： A61B6/405 , A61B6/032 , A61B6/4014 , A61B6/4035 , A61B6/4042 , A61B6/4241 , A61B6/482
摘要： An imaging system includes a radiation source (106, T1, T2, T3) that rotates about an examination region and emits radiation that traverses the examination region. The radiation source (106, T1, T2, T3) emits radiation having an energy spectrum that is selectively alternately switched between at least two different energy spectra during an imaging procedure. The system further includes an energy-resolving detector array (116, D1, D2, D3) that detects radiation traversing the examination region. The energy-resolving detector array (116, D1, D2, D3) resolves the detected radiation over at least two different energy ranges and produces energy-resolved output signals as a function of both emission energy spectrum and energy range. The system further includes a reconstructor (126) that performs a spectral reconstruction of the energy-resolved output signals. In another embodiment, the detector array (116) includes a photon-counting detector array (116).
摘要翻译：成像系统包括围绕检查区域旋转并且发射穿过检查区域的辐射的辐射源（106，T1，T2，T3）。辐射源（106，T1，T2，T3）发射具有在成像过程期间在至少两个不同能量谱之间选择性交替切换的能谱的辐射。该系统还包括检测穿过检查区域的辐射的能量分辨检测器阵列（116，D1，D2，D3）。能量分辨检测器阵列（116，D1，D2，D3）通过至少两个不同的能量范围来解析检测到的辐射，并且产生作为发射能量谱和能量范围的函数的能量分辨的输出信号。该系统还包括执行能量分辨输出信号的频谱重建的重建器（126）。在另一个实施例中，检测器阵列（116）包括光子计数检测器阵列（116）。

5. 发明授权

US08585286B2 Spectral detector calibration 有权
标题翻译：光谱检测器校准
公开(公告)号：US08585286B2
公开(公告)日：2013-11-19
申请号：US12934661
申请日：2009-03-20
申请人： Amir Livne , Naor Wainer , Jens-Peter Schlomka , Ewald Roessl , Roland Proksa
发明人： Amir Livne , Naor Wainer , Jens-Peter Schlomka , Ewald Roessl , Roland Proksa
IPC分类号： G01D18/00
CPC分类号： G01T7/005 , A61B6/032 , A61B6/4035 , A61B6/4042 , A61B6/4441 , A61B6/482 , A61B6/585 , G01N2223/3037 , G01T1/1647
摘要： A method includes detecting radiation that traverses a material having a known spectral characteristic with a radiation sensitive detector pixel that outputs a signal indicative of the detected radiation and determining a mapping between the output signal and the spectral characteristic. The method further includes determining an energy of a photon detected by the radiation sensitive detector pixel based on a corresponding output of the radiation sensitive detector pixel and the mapping.
摘要翻译：一种方法包括利用辐射敏感检测器像素检测穿过具有已知光谱特性的材料的辐射，所述辐射敏感检测器像素输出指示检测到的辐射的信号并确定输出信号和光谱特性之间的映射。该方法还包括基于辐射敏感检测器像素的对应输出和映射来确定由辐射敏感检测器像素检测到的光子的能量。

6. 发明授权

US08213566B2 K-edge imaging 有权
标题翻译： K边缘成像
公开(公告)号：US08213566B2
公开(公告)日：2012-07-03
申请号：US13000371
申请日：2009-06-22
申请人： Ewald Roessl , Roland Proksa , Jens-Peter Schlomka
发明人： Ewald Roessl , Roland Proksa , Jens-Peter Schlomka
IPC分类号： A61B6/00 , G06K9/00
CPC分类号： G01N23/087 , A61B5/4869 , A61B6/032 , A61B6/4241 , A61B6/481 , A61B6/482
摘要： An imaging system including a radiation source (110) that emits poly-chromatic radiation that traverses an examination region and a detector (116) that detects radiation traversing the examination region and produces a signal indicative of the energy of a detected photon. The system further includes an energy discriminator (122) that energy resolves the signal based on a plurality of different energy thresholds, wherein at least two of the energy thresholds have values corresponding to at least two different K-edge energies of two different elements in a mixture disposed in the examination region. The system also includes a signal decomposer (132) that decomposes the energy-resolved signal into at least a multi K-edge component representing the at least two different K-edge energies. In one instance, a stoichiometric ratio of the two different elements in the contrast agent is known and substantially constant.
摘要翻译：一种成像系统，包括发射穿过检查区域的多色辐射的辐射源（110）和检测穿过检查区域的辐射的检测器（116），并产生指示检测到的光子的能量的信号。所述系统还包括能量鉴别器（122），所述能量鉴别器（122）能量基于多个不同的能量阈值来解析所述信号，其中所述能量阈值中的至少两个具有对应于两个不同元素的至少两个不同K边能量的值混合物置于检查区域。该系统还包括信号分解器（132），其将能量分辨信号分解成代表至少两个不同的K边缘能量的至少多个K边缘分量。在一种情况下，造影剂中两种不同元素的化学计量比是已知的并且基本上是恒定的。

7. 发明申请

US20110096905A1 K-EDGE IMAGING 有权
标题翻译： K边形成像
公开(公告)号：US20110096905A1
公开(公告)日：2011-04-28
申请号：US13000371
申请日：2009-06-22
申请人： Ewald Roessl , Roland Proksa , Jens-Peter Schlomka
发明人： Ewald Roessl , Roland Proksa , Jens-Peter Schlomka
IPC分类号： G01N23/04
CPC分类号： G01N23/087 , A61B5/4869 , A61B6/032 , A61B6/4241 , A61B6/481 , A61B6/482
摘要： An imaging system including a radiation source (110) that emits poly-chromatic radiation that traverses an examination region and a detector (116) that detects radiation traversing the examination region and produces a signal indicative of the energy of a detected photon. The system further includes an energy discriminator (122) that energy resolves the signal based on a plurality of different energy thresholds, wherein at least two of the energy thresholds have values corresponding to at least two different K-edge energies of two different elements in a mixture disposed in the examination region. The system also includes a signal decomposer (132) that decomposes the energy-resolved signal into at least a multi K-edge component representing the at least two different K-edge energies. In one instance, a stoichiometric ratio of the two different elements in the contrast agent is known and substantially constant.
摘要翻译：一种成像系统，包括发射穿过检查区域的多色辐射的辐射源（110）和检测穿过检查区域的辐射的检测器（116），并产生指示检测到的光子的能量的信号。所述系统还包括能量鉴别器（122），所述能量鉴别器（122）能量基于多个不同的能量阈值来解析所述信号，其中所述能量阈值中的至少两个具有对应于两个不同元素的至少两个不同K边能量的值混合物置于检查区域。该系统还包括信号分解器（132），其将能量分辨信号分解成代表至少两个不同的K边缘能量的至少多个K边缘分量。在一种情况下，造影剂中两种不同元素的化学计量比是已知的并且基本上是恒定的。

8. 发明申请

US20110012014A1 SPECTRAL DETECTOR CALIBRATION 有权
标题翻译：光谱检测器校准
公开(公告)号：US20110012014A1
公开(公告)日：2011-01-20
申请号：US12934661
申请日：2009-03-20
申请人： Amir Livne , Naor Wainer , Jens-Peter Schlomka , Ewald Roessl , Roland Proksa
发明人： Amir Livne , Naor Wainer , Jens-Peter Schlomka , Ewald Roessl , Roland Proksa
IPC分类号： G01D18/00
CPC分类号： G01T7/005 , A61B6/032 , A61B6/4035 , A61B6/4042 , A61B6/4441 , A61B6/482 , A61B6/585 , G01N2223/3037 , G01T1/1647
摘要： A method includes detecting radiation that traverses a material having a known spectral characteristic with a radiation sensitive detector pixel that outputs a signal indicative of the detected radiation and determining a mapping between the output signal and the spectral characteristic. The method further includes determining an energy of a photon detected by the radiation sensitive detector pixel based on a corresponding output of the radiation sensitive detector pixel and the mapping.
摘要翻译：一种方法包括利用辐射敏感检测器像素检测穿过具有已知光谱特性的材料的辐射，所述辐射敏感检测器像素输出指示检测到的辐射的信号并确定输出信号和光谱特性之间的映射。该方法还包括基于辐射敏感检测器像素的对应输出和映射来确定由辐射敏感检测器像素检测到的光子的能量。

9. 发明授权

US07551709B2 Fan-beam coherent-scatter computer tomography 失效
标题翻译：扇梁相干散射计算机断层扫描
公开(公告)号：US07551709B2
公开(公告)日：2009-06-23
申请号：US10557688
申请日：2004-05-18
申请人： Jens-Peter Schlomka , Geoffrey Harding
发明人： Jens-Peter Schlomka , Geoffrey Harding
IPC分类号： A61B6/03
CPC分类号： A61B6/483 , A61B6/032 , A61B6/4241 , A61B6/482 , G01N23/046 , G01N2223/419
摘要： In CSCT, by using a fan-shaped primary beam, combined with a 2D detector, single-slice transmission tomography and scatter tomography can be measured simultaneously. In such a System blurred scatter functions are measured unless a monochromatic source of radiation is used. According to the present invention, an energy resolving 1D or 2D detector System is proposed, which, in combination with a tomographic reconstruction, provides a good spectral resolution, even with a polychromatic primary beam. Furthermore, according to an aspect of the present invention, only one energy resolving detector-line is required to achieve the fall spectrum. Advantageous applications of the system and method according to the present invention are in medical imaging and material analysis, such as baggage inspection.
摘要翻译：在CSCT中，通过使用扇形主光束，与2D检测器结合，可以同时测量单层透射层析成像和散射层析成像。在这样的系统中，模糊散射函数被测量，除非使用单色辐射源。根据本发明，提出了能量分辨1D或2D检测器系统，其结合断层重建，即使使用多色主波束也提供良好的光谱分辨率。此外，根据本发明的一个方面，仅需要一个能量分辨检测器线来实现坠落光谱。根据本发明的系统和方法的有利应用是在医疗成像和材料分析中，例如行李检查。

10. 发明授权

US07474728B2 Computed tomography apparatus 失效
标题翻译：计算机断层摄影仪
公开(公告)号：US07474728B2
公开(公告)日：2009-01-06
申请号：US10518848
申请日：2003-06-19
申请人： Jens-Peter Schlomka , Geoffrey Harding
发明人： Jens-Peter Schlomka , Geoffrey Harding
IPC分类号： G01N23/00 , G01N23/201
CPC分类号： A61B6/032 , A61B6/027 , A61B6/06 , A61B6/4291 , A61B6/4417 , A61B6/483
摘要： The invention relates to a computed tomography apparatus (CT apparatus) for imaging by means of radiation having traversed an object to be examined (that is, directly transmitted radiation), as well as by means of radiation scattered by the object to be examined, which apparatus includes a radiation source (S), a detector arrangement (16) and a device whereby the radiation (41a) having traversed the object to be examined can be blocked at least to an extent that the intensity incident on the detector arrangement (16) does not substantially exceed the intensity of radiation (41b) scattered by the object (13) to be examined and incident on the detector arrangement (16). The invention enables the detection of scattered radiation (CSCT mode) which is not affected by crosstalk from the transmitted radiation, even when the detector arrangement does not satisfy severe requirements as regards crosstalk properties and/or is configured as a single-row detector arrangement.
摘要翻译：本发明涉及一种用于通过已经穿过被检查物体（即，直接传播的辐射）的辐射进行成像的计算机断层摄影装置（CT装置），以及通过待检查对象散射的辐射，其中装置包括辐射源（S），检测器装置（16）和装置，其中穿过被检查物体的辐射（41a）至少可以被阻挡至入射到检测器装置（16）上的强度的程度，基本上不超过待检测物体（13）散射并入射在检测器装置（16）上的辐射强度（41b）。即使当检测器装置不满足关于串扰特性的严格要求和/或被配置为单行检测器装置时，本发明能够检测不受来自透射辐射的串扰影响的散射辐射（CSCT模式）。

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