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公开(公告)号：US20090202127A1
公开(公告)日：2009-08-13
申请号：US12305983
申请日：2007-06-13
IPC分类号： G06K9/00
CPC分类号： G06T11/005 , G06T5/003 , G06T2207/10081 , G06T2207/30004
摘要： A method for generating a set of kernels for convolution error compensation of a projection image of a physical object recorded by an imaging system comprises calculating the set of kernels in such a way that for each pixel of the projection image an asymmetric scatter distribution for error compensation is calculated representing a X-ray scatter originating along a ray from an X-ray source to the pixel.
摘要翻译： 用于生成用于由成像系统记录的物理物体的投影图像的卷积误差补偿的一组内核的方法包括以对投影图像的每个像素进行误差补偿的不对称散布分布的方式来计算该组内核 表示沿着从X射线源到像素的射线发生的X射线散射。
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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：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：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：US08000435B2
公开(公告)日：2011-08-16
申请号：US12625600
申请日：2009-11-25
IPC分类号： A61B6/00
CPC分类号： G06T11/005
摘要： A method includes generating a plurality of scatter distributions based on geometric models having different object to detector distances, determining an imaged object to detector distance, and identifying a scatter distribution of the plurality of scatter distributions having a object to detector distance that corresponds to the imaged object to detector distance. The method also includes employing the identified scatter distribution to scatter correct projection data corresponding to the imaged object. Another method includes generating an estimate of wedge scatter by propagating a predetermined wedge scatter profile through an intermediate reconstruction of an object; and employing the estimate to wedge scatter correct the projection data.
摘要翻译： 一种方法包括基于具有不同对象与检测器距离的几何模型来生成多个散射分布，将成像对象确定为检测器距离，以及识别具有对象的多个散射分布的散射分布与检测器距离对应于被成像 对象到检测器距离。 该方法还包括使用所识别的散布分布散布对应于成像对象的正确投影数据。 另一种方法包括通过传播预定的楔形散射剖面通过对象的中间重建来产生楔散射的估计; 并使用估计来楔形散射校正投影数据。
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公开(公告)号：US09140803B2
公开(公告)日：2015-09-22
申请号：US13501257
申请日：2010-09-16
申请人： Matthias Bertram , Jens Wiegert , Kevin M. Brown
发明人： Matthias Bertram , Jens Wiegert , Kevin M. Brown
摘要： A method includes generating, via a dose estimator, a dose map indicative of an estimated dose deposited in a subject based on acquisition protocol parameter values of an acquisition protocol of an imaging system, and generating, via a noise estimator, at least one of a noise map indicative of an estimated image noise based on the acquisition protocol parameter values or a contrast-to-noise map based on the noise map and an attenuation map. The method further includes displaying, via a display, the dose and noise maps in a human readable format.
摘要翻译： 一种方法包括：基于成像系统的获取协议的获取协议参数值，经由剂量估计器生成指示被放置在被摄体中的估计剂量的剂量图，并且经由噪声估计器生成以下各项中的至少一个： 基于采集协议参数值或基于噪声图和衰减图的对比噪声映射表示估计图像噪声的噪声映射。 该方法还包括通过显示器以人类可读格式显示剂量和噪声图。
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公开(公告)号：US08290116B2
公开(公告)日：2012-10-16
申请号：US13063486
申请日：2009-09-09
申请人： Jens Wiegert , Matthias Bertram
发明人： Jens Wiegert , Matthias Bertram
CPC分类号： G06T11/005 , A61B6/027 , A61B6/4291
摘要： The present invention relates to an imaging apparatus for generating an image of a region of interest of an object. The imaging apparatus comprises a radiation source (2) for emitting radiation (4) and a detector (6) for measuring the radiation (4) after having traversed the region of interest and for generating measured detection values depending on the measured radiation (4). The imaging apparatus further comprises an attenuation element for attenuating the radiation (4) before traversing the region of interest and an attenuation element scatter values providing unit (12) for providing attenuation element scatter values, which depend on scattering of the radiation (4) caused by the attenuation element. A detection values correction unit (17) corrects the measured detection values based on the provided attenuation element scatter values, and a reconstruction unit (18) reconstructs an image of the region of interest from the corrected detection values.
摘要翻译： 本发明涉及一种用于生成对象的感兴趣区域的图像的成像装置。 成像设备包括用于发射辐射的辐射源（2）和用于在穿过感兴趣区域之后测量辐射（4）的检测器（6），并且用于根据所测量的辐射（4）产生测量的检测值， 。 成像装置还包括用于在穿过感兴趣区域之前衰减辐射（4）的衰减元件和用于提供依赖于辐射（4）的散射的衰减元件散射值的衰减元件散射值提供单元（12） 通过衰减元件。 检测值校正单元（17）基于所提供的衰减元件散射值来校正测量的检测值，并且重建单元（18）从校正的检测值重建感兴趣区域的图像。
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公开(公告)号：US20110110573A1
公开(公告)日：2011-05-12
申请号：US13000030
申请日：2009-06-23
申请人： Jens Wiegert , Matthias Bertram
发明人： Jens Wiegert , Matthias Bertram
CPC分类号： G06T11/005 , A61B6/032 , A61B6/542
摘要： The present invention relates to an image generation device for generating an image from measured data, wherein image quality is optimized for a region of interest and to an imaging system comprising this image generation device. The image generation device comprises a noise determination unit for determining a distribution of noise in a projection domain of the region of interest, and a dose control unit (32) for determining a dose profile for a radiation source (2) of said image generation device based on said determined distribution of noise by using a noise propagation algorithm. Thereby, signal-to-noise ratio of a reconstructed volume can be improved and is not sensitively dependent on a selected region of interest.
摘要翻译： 本发明涉及一种用于根据测量数据产生图像的图像产生装置，其中对于感兴趣的区域和包括该图像生成装置的成像系统优化图像质量。 该图像生成装置包括用于确定感兴趣区域的投影域中的噪声分布的噪声确定单元，以及用于确定所述图像生成装置的辐射源（2）的剂量分布的剂量控制单元（32） 基于所述确定的噪声分布，使用噪声传播算法。 因此，可以改善重建体积的信噪比并且不敏感地依赖于所选择的感兴趣区域。
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公开(公告)号：US20110060566A1
公开(公告)日：2011-03-10
申请号：US12991708
申请日：2009-05-13
IPC分类号： G06F17/10
CPC分类号： G06T11/005
摘要： A method and apparatus of image reconstruction correcting for photon scatter is provided. A direct physical measurement of scattered photons is used in conjunction with a physical model of the photon scattering process to make the corrections.
摘要翻译： 提供了一种用于光子散射的图像重建校正方法和装置。 散射光子的直接物理测量与光子散射过程的物理模型结合使用以进行校正。
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公开(公告)号：US20100119139A1
公开(公告)日：2010-05-13
申请号：US12625600
申请日：2009-11-25
IPC分类号： G06K9/62
CPC分类号： G06T11/005
摘要： A method includes generating a plurality of scatter distributions based on geometric models having different object to detector distances, determining an imaged object to detector distance, and identifying a scatter distribution of the plurality of scatter distributions having a object to detector distance that corresponds to the imaged object to detector distance. The method also includes employing the identified scatter distribution to scatter correct projection data corresponding to the imaged object. Another method includes generating an estimate of wedge scatter by propagating a predetermined wedge scatter profile through an intermediate reconstruction of an object; and employing the estimate to wedge scatter correct the projection data.
摘要翻译： 一种方法包括基于具有不同对象与检测器距离的几何模型来生成多个散射分布，将成像对象确定为检测器距离，以及识别具有对象的多个散射分布的散射分布与检测器距离对应于被成像 对象到检测器距离。 该方法还包括使用所识别的散布分布散布对应于成像对象的正确投影数据。 另一种方法包括通过传播预定的楔形散射剖面通过对象的中间重建来产生楔散射的估计; 并使用估计来楔形散射校正投影数据。
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