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1.发明申请METHOD AND APPARATUS TO IMPROVE CT IMAGE ACQUISITION USING A DISPLACED GEOMETRY 有权使用位移几何来改进CT图像采集的方法和装置公开(公告)号：US20110182400A1
公开(公告)日：2011-07-28
申请号：US13120660
申请日：2009-10-05
申请人： Peter Forthmann , Thomas Koehler , Udo Van Stevendaal , Matthias Bertram , Steffen Wiesner , Colas Schretter
发明人： Peter Forthmann , Thomas Koehler , Udo Van Stevendaal , Matthias Bertram , Steffen Wiesner , Colas Schretter
摘要： A method and apparatus are provided to improve CT image acquisition using a displaced acquisition geometry. A CT apparatus may be used having a source (102) and a detector (104) transversely displaced from a center (114) of a field of view (118) during acquisition of the projection data. The amount of transverse displacement may be determined based on the size of the object (108). The source and the detector may be adjusted to vary the size of the transverse field of view. The first data set acquired by the detector may be reconstructed and used to simulate missing projection data that could not be acquired by the detector at each projection angle. The measured projection data and the simulated projection data may be used to obtain a second data set. The second data set may be compared to the first data set to produce a corrected data set.
摘要翻译： 提供了一种方法和装置，用于改善使用位移采集几何形状的CT图像采集。 可以使用CT装置，在获取投影数据期间具有从视场（118）的中心（114）横向移位的源（102）和检测器（104）。 可以基于物体（108）的尺寸来确定横向位移量。 源和检测器可以被调节以改变横向视场的大小。 由检测器获取的第一数据集可以被重构并用于模拟在每个投影角度不能由检测器获取的丢失的投影数据。 所测量的投影数据和模拟投影数据可用于获得第二数据集。 可以将第二数据集与第一数据集进行比较以产生校正数据集。
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2.发明授权Method and apparatus to improve CT image acquisition using a displaced geometry 有权使用位移几何来改善CT图像采集的方法和装置公开(公告)号：US08379791B2
公开(公告)日：2013-02-19
申请号：US13120660
申请日：2009-10-05
申请人： Peter Forthmann , Thomas Koehler , Udo Van Stevendaal , Matthias Bertram , Steffen Wiesner , Colas Schretter
发明人： Peter Forthmann , Thomas Koehler , Udo Van Stevendaal , Matthias Bertram , Steffen Wiesner , Colas Schretter
IPC分类号： A61B6/00
摘要： A method and apparatus are provided to improve CT image acquisition using a displaced acquisition geometry. A CT apparatus may be used having a source (102) and a detector (104) transversely displaced from a center (114) of a field of view (118) during acquisition of the projection data. The amount of transverse displacement may be determined based on the size of the object (108). The source and the detector may be adjusted to vary the size of the transverse field of view. The first data set acquired by the detector may be reconstructed and used to simulate missing projection data that could not be acquired by the detector at each projection angle. The measured projection data and the simulated projection data may be used to obtain a second data set. The second data set may be compared to the first data set to produce a corrected data set.
摘要翻译： 提供了一种方法和装置，用于改善使用位移采集几何形状的CT图像采集。 可以使用CT装置，在获取投影数据期间具有从视场（118）的中心（114）横向移位的源（102）和检测器（104）。 可以基于物体（108）的尺寸来确定横向位移量。 源和检测器可以被调节以改变横向视场的大小。 由检测器获取的第一数据集可以被重构并用于模拟在每个投影角度不能由检测器获取的丢失的投影数据。 所测量的投影数据和模拟投影数据可用于获得第二数据集。 可以将第二数据集与第一数据集进行比较以产生校正数据集。
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3.发明授权Method and apparatus to filter X-ray beams generated using a CT apparatus with displaced geometry 有权过滤使用具有移位几何形状的CT装置产生的X射线束的方法和装置公开(公告)号：US08666020B2
公开(公告)日：2014-03-04
申请号：US13144167
申请日：2009-12-09
IPC分类号： A61B6/03
CPC分类号： A61B6/587 , A61B6/032 , A61B6/4035 , A61B6/508 , G21K1/10
摘要： A method and apparatus are provided to filter x-ray beams generated using a CT apparatus or other x-ray based system with displaced acquisition geometry. A CT apparatus may be used having a source (102), a detector (104) transversely displaced from a center (114) of a field of view (118) during acquisition of the projection data, and a filter (146). The filter may absorb at least a portion of overlapping radiation emitted by the source at opposing angular positions. The amount of transverse displacement may be determined for a desired field of view configuration and amount of overlapping radiation. The detector may be adjusted to correspond to the amount of determined transverse displacement. The size and location of the filter may be determined based on the amount of overlapping radiation. The filter may be adjusted to correspond to the determined size and location of the filter.
摘要翻译： 提供了一种方法和装置，用于过滤使用CT装置产生的X射线束或其他基于X射线的取向几何形状的系统。 可以使用CT装置，其具有源（102），在获取投影数据期间从视场（118）的中心（114）横向移位的检测器（104）和过滤器（146）。 过滤器可以吸收源在相对的角位置处发射的重叠辐射的至少一部分。 可以针对期望的视场配置和重叠辐射量来确定横向位移的量。 检测器可以被调节以对应于确定的横向位移的量。 滤波器的尺寸和位置可以基于重叠辐射的量来确定。 滤波器可以被调节以对应于所确定的滤波器的尺寸和位置。
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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）。
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公开(公告)号：US20120002780A1
公开(公告)日：2012-01-05
申请号：US13203994
申请日：2010-02-09
CPC分类号： A61B6/032 , A61B6/027 , A61B6/037 , A61B6/06 , A61B6/488 , A61B6/5217 , A61B6/5235 , A61B6/541 , A61B6/542 , A61B6/545 , A61B6/583 , G06T7/20 , G06T2207/10072 , G06T2207/30004
摘要： A method is provided for imaging a portion of a patient that moves as a patient breathes. A motion map is produced of the portion's motion during a breathing cycle of the patient. A scanning protocol is generated using information obtained from the motion map for a given source/detector position and a given point in the breathing cycle. The scanning protocol comprises at least one setting for at least one imaging apparatus component such that a desired amount of x-ray dosage is applied to the portion of the patient at the given source/detector position and the given point in the breathing cycle. An imaging scan is performed of the portion of the patient. The at least one imaging apparatus component is adjusted during the imaging scan.
摘要翻译： 提供了一种用于对患者呼吸时移动的患者的一部分进行成像的方法。 在患者的呼吸周期期间，该部分的运动产生运动图。 使用从给定源/检测器位置的运动图获得的信息和呼吸周期中的给定点生成扫描协议。 扫描方案包括用于至少一个成像设备部件的至少一个设置，使得在给定的源/检测器位置和呼吸周期中的给定点，将期望量的x射线剂量施加到患者的部分。 对患者的部分进行成像扫描。 在成像扫描期间调整至少一个成像装置部件。
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公开(公告)号：US09107591B2
公开(公告)日：2015-08-18
申请号：US13632217
申请日：2012-10-01
摘要： An imaging system includes a radiation source that emits radiation that traverses an examination region. A controller activates the radiation source to emit radiation and deactivates the radiation source to stop radiation emission. The controller selectively activates the radiation source to emit radiation at one or more pre-determined angles. In another embodiment, the imaging system includes a data processing component that generates a virtual three dimensional image of an object of interest of the scanned subject based on the image data. In another embodiment, the imaging system is in a communication with a data manipulation and packaging component that generates at least a two dimensional or a three dimensional data set based on the volumetric image data and packages the data set in an object provided to a remote system that manipulates and navigates through the data set.
摘要翻译： 成像系统包括发射穿过检查区域的辐射的辐射源。 控制器激活辐射源发射辐射并使辐射源停用以停止辐射。 控制器选择性地激活辐射源以以一个或多个预定角度发射辐射。 在另一个实施例中，成像系统包括基于图像数据生成被扫描对象的感兴趣对象的虚拟三维图像的数据处理部件。 在另一个实施例中，成像系统与数据处理和打包部件通信，该组件基于体积图像数据生成至少二维或三维数据集，并将数据集打包在提供给远程系统的对象中 它操纵和浏览数据集。
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公开(公告)号：US20110116598A1
公开(公告)日：2011-05-19
申请号：US13054103
申请日：2009-07-14
IPC分类号： G01N23/04
摘要： An imaging system includes a radiation source (110) that emits radiation that traverses an examination region. A controller (116) activates the radiation source (110) to emit radiation and deactivates the radiation source (110) to stop radiation emission. The controller (116) selectively activates the radiation source (110) to emit radiation at one or more pre-determined angles. In another embodiment, the imaging system includes a data processing component (124) that generates a virtual three dimensional image of an object of interest of the scanned subject based on the image data. In another embodiment, the imaging system is in a communication with a data manipulation and packaging component (128) that generates at least a two dimensional or a three dimensional data set based on the volumetric image data and packages the data set in an object provided to a remote system (132) that manipulates and navigates through the data set.
摘要翻译： 成像系统包括发射穿过检查区域的辐射的辐射源（110）。 控制器（116）激活辐射源（110）以发射辐射并使辐射源（110）停用以停止辐射发射。 控制器（116）选择性地激活辐射源（110）以以一个或多个预定角度发射辐射。 在另一个实施例中，成像系统包括基于图像数据生成被扫描对象的感兴趣对象的虚拟三维图像的数据处理组件（124）。 在另一个实施例中，成像系统与数据操作和打包组件（128）通信，数据操纵和打包组件（128）基于体积图像数据生成至少二维或三维数据集，并将数据集打包在提供给 远程系统（132），其操纵和导航数据集。
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公开(公告)号：US20070140410A1
公开(公告)日：2007-06-21
申请号：US10575584
申请日：2004-10-05
CPC分类号： G06T11/006 , A61B6/027 , G06T2211/416 , Y10S378/901
摘要： Known reconstruction techniques from coherent scattered x-rays apply non-exact reconstruction techniques. According to the present invention, a relatively wide spectrum of wave-vector transfers q of the scattered x-ray photons is acquired. The projection data is interpreted as line integrals in the x y-q space and the projection data is resorted to correspond to an acquisition along any source trajectory. Due to this, an exact helical reconstruction algorithms may be applied and redundant data may be used to obtain a better image quality.
摘要翻译： 来自相干散射X射线的已知重建技术应用非精确重建技术。 根据本发明，获得了散射的x射线光子的相对宽的波矢量传输q。 投影数据被解释为x y-q空间中的线积分，并且投影数据被用来对应于沿着任何源轨迹的获取。 因此，可以应用精确的螺旋重建算法，并且可以使用冗余数据来获得更好的图像质量。
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公开(公告)号：US20110200232A1
公开(公告)日：2011-08-18
申请号：US13124289
申请日：2009-10-06
CPC分类号： A61B6/032 , A61B6/466 , A61B6/503 , G06T7/246 , G06T2207/10081 , G06T2207/30048
摘要： A method is provided for using CT imaging data to characterize the movement of a moving object. The method calculates one or more motion values based on motion vectors which are representative of the object's movement. The moving object may be, for example, a beating heart.
摘要翻译： 提供了一种使用CT成像数据来表征移动物体的运动的方法。 该方法基于代表对象运动的运动矢量来计算一个或多个运动值。 移动物体可以是例如跳动的心脏。
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公开(公告)号：US07580499B2
公开(公告)日：2009-08-25
申请号：US10575584
申请日：2004-10-05
IPC分类号： A61B6/03
CPC分类号： G06T11/006 , A61B6/027 , G06T2211/416 , Y10S378/901
摘要： Known reconstruction techniques from coherent scattered x-rays apply non-exact reconstruction techniques. According to the present invention, a relatively wide spectrum of wave-vector transfers q of the scattered x-ray photons is acquired. The projection data is interpreted as line integrals in the x y-q space and the projection data is resorted to correspond to an acquisition along any source trajectory. Due to this, an exact helical reconstruction algorithms may be applied and redundant data may be used to obtain a better image quality.
摘要翻译： 来自相干散射X射线的已知重建技术应用非精确重建技术。 根据本发明，获得了散射的x射线光子的相对宽的波矢量传输q。 投影数据被解释为x y-q空间中的线积分，并且投影数据被用来对应于沿着任何源轨迹的获取。 因此，可以应用精确的螺旋重建算法，并且可以使用冗余数据来获得更好的图像质量。
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