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1.发明申请METHOD AND APPARATUS FOR LARGE FIELD OF VIEW IMAGING AND DETECTION AND COMPENSATION OF MOTION ARTIFACTS 审中-公开大视野影像成像方法与装置及运动制品的检测与补偿公开(公告)号：US20110286573A1
公开(公告)日：2011-11-24
申请号：US13145128
申请日：2009-12-23
CPC分类号： G06T11/005 , A61B6/032 , A61B6/4085 , A61B6/4233 , A61B6/4452 , A61B6/488 , A61B6/5217 , A61B6/542 , A61B6/587 , G06T5/20 , G06T7/20 , G06T2207/10116 , G06T2207/20032 , G06T2211/40 , G06T2211/412
摘要： A method and apparatus are provided to improve large field of view CT image acquisition by using at least two scanning procedures: (i) one with the radiation source and detector centered and (ii) one in an offset configuration. The imaging data obtained from both of the scanning procedures is used in the reconstruction of the image. In addition, a method and apparatus are provided for detecting motion in a reconstructed image by generating a motion map that is indicative of the regions of the reconstructed image that are affected by motion artifacts. Optionally, the motion map may be used for motion estimation and/or motion compensation to prevent or diminish motion artifacts in the resulting reconstructed image. An optional method for generating a refined motion map is also provided.
摘要翻译： 提供了一种通过使用至少两个扫描程序来改善大视野CT图像获取的方法和装置：（i）一个具有辐射源和检测器的中心，以及（ii）一个偏移配置。 从扫描过程中获得的成像数据用于重建图像。 此外，提供了一种方法和装置，用于通过产生指示受运动伪像影响的重建图像的区域的运动图来检测重建图像中的运动。 可选地，运动图可以用于运动估计和/或运动补偿以防止或减少所得到的重建图像中的运动伪像。 还提供了用于生成精细运动图的可选方法。
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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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公开(公告)号：US20100208971A1
公开(公告)日：2010-08-19
申请号：US12679961
申请日：2008-09-24
IPC分类号： G06K9/00
CPC分类号： A61B6/504 , A61B6/032 , A61B6/4441 , A61B6/481 , A61B6/507
摘要： It is provided a method for imaging a dynamic process in a part of the body, especially blood perfusion, with an x-ray system as well as corresponding apparatuses and a corresponding computer readable medium. Especially it is described a method for imaging a dynamic process in a part of the body, especially blood perfusion, with an x-ray system, comprising: acquiring rotational projections of the part of the body over an angular range (2), deriving the anatomy of the part of the body subject to the dynamic process using a tomographic reconstruction from the projections (3), determining an optimal position of the x-ray system according to the derived anatomy for acquiring projections of the dynamic process (4), administering contrast agent to the part of the body (5), acquiring projections of the dynamic process from the determined position (6); calculating the dynamic contrast enhancement over time (7); and calculating and displaying perfusion parameters (8).
摘要翻译： 提供了一种用于利用x射线系统以及对应的装置和相应的计算机可读介质对身体的一部分，特别是血液灌注中的动态过程进行成像的方法。 特别地，描述了一种利用x射线系统对身体的一部分，特别是血液灌注中的动态过程进行成像的方法，包括：在角度范围（2）上获取身体部分的旋转突起，导出 使用来自投影（3）的断层摄影重建的动态过程的身体部分的解剖结构，根据导出的解剖结构确定x射线系统的最佳位置以获取动态过程（4）的投影，管理 造影剂到身体的一部分（5），从确定的位置（6）获取动态过程的投影; 随着时间的推移计算动态对比度增强（7）; 并计算和显示灌注参数（8）。
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公开(公告)号：US20080205723A1
公开(公告)日：2008-08-28
申请号：US12090359
申请日：2006-10-06
申请人： Joerg Bredno , Georg Rose , Juergen Weese , Alexandra Groth , Sabine Mollus , Matthias Bertram , Jens Wiegert , Christoph Neukirchen
发明人： Joerg Bredno , Georg Rose , Juergen Weese , Alexandra Groth , Sabine Mollus , Matthias Bertram , Jens Wiegert , Christoph Neukirchen
IPC分类号： A61B6/00
摘要： Adaptively controlling an imaging system (200, 205) includes constructing model feature characteristics (105) of a process over time, determining parameters and commands (110) for controlling the imaging system for each state of the process, performing data acquisition (120) for the process, extracting current features (130) of the process from the acquired data, matching (135) the current features (130) with the model feature characteristics (105) to determine a state of the process (140), and controlling the data acquisition based on the state of the process to produce optimized data.
摘要翻译： 自适应地控制成像系统（200,205）包括构建处理过程的模型特征特征（105），确定参数和命令（110），以控制成像系统对于每个处理状态，执行数据采集（120） 该过程从所获取的数据提取过程的当前特征（130），将当前特征（130）与模型特征特征（105）匹配（135）以确定过程（140）的状态，以及控制数据 根据进程的状态获取生成优化数据。
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公开(公告)号：US08086001B2
公开(公告)日：2011-12-27
申请号：US12090359
申请日：2006-10-06
申请人： Joerg Bredno , Georg Rose , Juergen Weese , Alexandra Groth , Sabine Mollus , Matthias Bertram , Jens Wiegert , Christoph Neukirchen
发明人： Joerg Bredno , Georg Rose , Juergen Weese , Alexandra Groth , Sabine Mollus , Matthias Bertram , Jens Wiegert , Christoph Neukirchen
IPC分类号： G06K9/00
摘要： Adaptively controlling an imaging system (200, 205) includes constructing model feature characteristics (105) of a process over time, determining parameters and commands (110) for controlling the imaging system for each state of the process, performing data acquisition (120) for the process, extracting current features (130) of the process from the acquired data, matching (135) the current features (130) with the model feature characteristics (105) to determine a state of the process (140), and controlling the data acquisition based on the state of the process to produce optimized data.
摘要翻译： 自适应地控制成像系统（200,205）包括构建处理过程的模型特征特征（105），确定参数和命令（110），以控制成像系统对于每个处理状态，执行数据采集（120） 该过程从所获取的数据提取过程的当前特征（130），将当前特征（130）与模型特征特征（105）匹配（135）以确定过程（140）的状态，以及控制数据 根据进程的状态获取生成优化数据。
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公开(公告)号：US08483363B2
公开(公告)日：2013-07-09
申请号：US12740366
申请日：2008-11-04
IPC分类号： G21K3/00
CPC分类号： A61B6/032 , A61B6/037 , A61B6/4035 , G21K1/10
摘要： When generating a 3D image of a subject or patient, a cone beam X-ray source (20a, 20b) is mounted to a rotatable gantry (14) opposite an offset flat panel X-ray detector (22a, 22b). A wedge-shaped attenuation filter (24a, 24b) of suitable material (e.g., aluminum or the like) is adjustably positioned in the cone beam to selectively attenuate the beam as a function of the shape, size, and density of a volume of interest (18) through which X-rays pass in order to maintain X-ray intensity or gain at a relatively constant level within a range of acceptable levels.
摘要翻译： 当产生被摄体或患者的3D图像时，锥形束X射线源（20a，20b）安装到与偏移平板X射线检测器（22a，22b）相对的可旋转机架（14）。 适当材料（例如铝等）的楔形衰减滤波器（24a，24b）可调节地定位在锥形束中，以根据感兴趣体积的形状，尺寸和密度来选择性地衰减光束 （18），以便在可接受水平的范围内使X射线强度或增益保持在相对恒定的水平。
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公开(公告)号：US20120321156A1
公开(公告)日：2012-12-20
申请号：US13582124
申请日：2011-03-04
IPC分类号： G06K9/00
CPC分类号： G06T7/2053 , A61B6/4441 , A61B6/4464 , A61B6/503 , A61B6/504 , A61B6/5235 , A61B6/5288 , G06T7/254 , G06T2207/10121 , G06T2207/30048 , G06T2207/30101
摘要： A method and an apparatus for motion visualization of a moving object in angiographic images are described. In a preferred embodiment of the method, first a mask image of the object of interest is acquired and a sequence of angiographic images of the object in different phases of motion of the object is acquired. Then, a first angiographic subtraction image and at least a second angiographic subtraction image are generated by subtracting the angiographic images from the mask image. Subsequently, a twice subtracted image is generated by subtracting the first angiographic subtraction image from the second angiographic subtraction image. In this way a double subtraction, i.e. a twice subtracted angiography is performed, to facilitate the assessment of the motion.
摘要翻译： 描述了用于血管造影图像中的移动物体的运动可视化的方法和装置。 在该方法的优选实施例中，首先获取感兴趣对象的掩模图像，并且获取对象在运动对象的不同阶段中的血管造影图像序列。 然后，通过从掩模图像中减去血管造影图像来生成第一血管造影减影图像和至少第二血管造影减影图像。 随后，通过从第二血管造影减影图像中减去第一血管造影减影图像来产生两倍的减影图像。 以这种方式，执行双减法，即进行两次减去的血管造影术，以便于评估运动。
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公开(公告)号：US20100308229A1
公开(公告)日：2010-12-09
申请号：US12740366
申请日：2008-11-04
CPC分类号： A61B6/032 , A61B6/037 , A61B6/4035 , G21K1/10
摘要： When generating a 3D image of a subject or patient, a cone beam X-ray source (20a, 20b) is mounted to a rotatable gantry (14) opposite an offset flat panel X-ray detector (22a, 22b). A wedge-shaped attenuation filter (24a, 24b) of suitable material (e.g., aluminum or the like) is adjustably positioned in the cone beam to selectively attenuate the beam as a function of the shape, size, and density of a volume of interest (18) through which X-rays pass in order to maintain X-ray intensity or gain at a relatively constant level within a range of acceptable levels.
摘要翻译： 当产生被摄体或患者的3D图像时，锥形束X射线源（20a，20b）安装到与偏移平板X射线检测器（22a，22b）相对的可旋转机架（14）。 适当材料（例如铝等）的楔形衰减滤波器（24a，24b）可调节地定位在锥形束中，以根据感兴趣体积的形状，尺寸和密度来选择性地衰减光束 （18），以便在可接受水平的范围内使X射线强度或增益保持在相对恒定的水平。
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公开(公告)号：US09025840B2
公开(公告)日：2015-05-05
申请号：US13582124
申请日：2011-03-04
CPC分类号： G06T7/2053 , A61B6/4441 , A61B6/4464 , A61B6/503 , A61B6/504 , A61B6/5235 , A61B6/5288 , G06T7/254 , G06T2207/10121 , G06T2207/30048 , G06T2207/30101
摘要： A method and an apparatus for motion visualization of a moving object in angiographic images are described. In a preferred embodiment of the method, first a mask image of the object of interest is acquired and a sequence of angiographic images of the object in different phases of motion of the object is acquired. Then, a first angiographic subtraction image and at least a second angiographic subtraction image are generated by subtracting the angiographic images from the mask image. Subsequently, a twice subtracted image is generated by subtracting the first angiographic subtraction image from the second angiographic subtraction image. In this way a double subtraction, i.e. a twice subtracted angiography is performed, to facilitate the assessment of the motion.
摘要翻译： 描述了用于血管造影图像中的移动物体的运动可视化的方法和装置。 在该方法的优选实施例中，首先获取感兴趣对象的掩模图像，并且获取对象在运动对象的不同阶段中的血管造影图像序列。 然后，通过从掩模图像中减去血管造影图像来生成第一血管造影减影图像和至少第二血管造影减影图像。 随后，通过从第二血管造影减影图像中减去第一血管造影减影图像来产生两倍的减影图像。 以这种方式，执行双减法，即进行两次减去的血管造影术，以便于评估运动。
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