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48 条记录 (耗时 0.028 秒)

    Spectral CT
    1.
    发明授权
    Spectral CT 有权
    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）。

    SPECTRAL CT
    2.
    发明申请
    SPECTRAL CT 有权
    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）。

    Coherent Scatter Imaging
    3.
    发明申请
    Coherent Scatter Imaging 审中-公开
    相干散射成像

    公开(公告)号：US20080317311A1

    公开(公告)日：2008-12-25

    申请号：US11574742

    申请日：2005-09-09

    申请人： Michael Grass ,  Jens-Peter Schlomka ,  Udo Van Stevendaal

    发明人： Michael Grass ,  Jens-Peter Schlomka ,  Udo Van Stevendaal

    IPC分类号： G06K9/00

    CPC分类号： G01V5/0025 ,  G01T1/1644

    摘要： A region of interest is identified using a conventional CT or X-ray approach. Then, the region of interest is scanned using a plurality of pencil beams (28) to obtain a plurality of different scattered X-ray spectra. A geometric correction is then applied to each spectrum as if the spectrum was solely due to features in the region of interest. The various spectra recorded using the beams are combined and correlated to determine features of the region of interest (32) whilst minimising the effect of features in the rest of the sample (30).

    摘要翻译： 使用常规CT或X射线方法识别感兴趣区域。 然后，使用多个笔形光束（28）扫描感兴趣区域，以获得多个不同的散射X射线光谱。 然后将几何校正应用于每个频谱，好像光谱完全是由于感兴趣区域中的特征。 使用光束记录的各种光谱被组合并相关，以确定感兴趣区域（32）的特征，同时最小化样本（30）的其余部分中的特征的影响。

    Coherent Scatter Imaging
    4.
    发明申请
    Coherent Scatter Imaging 审中-公开
    相干散射成像

    公开(公告)号：US20070253532A1

    公开(公告)日：2007-11-01

    申请号：US11574741

    申请日：2005-09-09

    申请人： Udo Van Stevendaal ,  Jens-Peter Schlomka ,  Michael Grass

    发明人： Udo Van Stevendaal ,  Jens-Peter Schlomka ,  Michael Grass

    IPC分类号： G01N23/201

    CPC分类号： G01T1/1644 ,  A61B6/03 ,  A61B6/483 ,  G01V5/0025

    摘要： A CSI system is described that uses pencil beams 40,42,44,46 through a sample 30 having a region of interest 32. Each coherent scatter spectrum of sample beams 40, 44 through the region of interest is subtracted by the spectra using respective reference beams 42, 46. The measurements are combined to determine features of the region of interest 32 whilst minimising the effect of features in the rest of the sample 30.

    摘要翻译： 描述了CSI系统，其通过具有感兴趣区域32的样本30使用笔束40,42,44,46。通过使用相应参考的频谱将样本波束40,44通过感兴趣区域的每个相干散射光谱减去 光束42,46。将测量结合以确定感兴趣区域32的特征，同时最小化样本30的其余部分中的特征的影响。

    Digital pulse processing for multi-spectral photon counting readout circuits
    5.
    发明授权
    Digital pulse processing for multi-spectral photon counting readout circuits 有权
    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。

    K-edge imaging
    6.
    发明授权
    K-edge imaging 有权
    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。

    K-EDGE IMAGING
    7.
    发明申请
    K-EDGE IMAGING 有权
    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。

    Coherent Scatter Computer Tomography Material Identification
    10.
    发明申请
    Coherent Scatter Computer Tomography Material Identification 审中-公开
    相干散射计算机断层扫描材料鉴定

    公开(公告)号：US20080205598A1

    公开(公告)日：2008-08-28

    申请号：US11813111

    申请日：2006-01-10

    申请人： Udo Van Stevendaal ,  Jens-Peter Schlomka

    发明人： Udo Van Stevendaal ,  Jens-Peter Schlomka

    IPC分类号： G01N23/201

    CPC分类号： A61B6/032 ,  A61B6/483 ,  A61B6/5235 ,  G01N23/046 ,  G01N23/20083 ,  G01N2223/419

    摘要： In a CSCT material identification apparatus CT-information and differential scatter cross-sections are used for material identification. According to an aspect of the present invention, a material identification is provided which uses both the differential and the total scatter cross-sections. This may yield an improved material discrimination, i.e. a better detection rate and a lower false alarm rate.

    摘要翻译： 在CSCT材料识别装置中，CT信息和差分散射截面用于材料识别。 根据本发明的一个方面，提供了使用差分和总散射截面两者的材料识别。 这可能产生改进的材料鉴别，即更好的检测率和更低的误报率。