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1.发明授权公开(公告)号：US08363917B2
公开(公告)日：2013-01-29
申请号：US12578886
申请日：2009-10-14
申请人： Jiahua Fan , Naveen Chandra , Andrew Johnson , Jiang Hsieh , Fang Dong , Mary Sue Kulpins , Peter Crandall
发明人： Jiahua Fan , Naveen Chandra , Andrew Johnson , Jiang Hsieh , Fang Dong , Mary Sue Kulpins , Peter Crandall
CPC分类号： G06T11/008 , G06T2211/408
摘要： A CT system includes a generator configured to energize an x-ray source to a first kilovoltage (kVp) and to a second kVp, and a computer that is programmed to acquire a first view dataset with the x-ray source energized to the first kVp and a second view dataset with the x-ray source energized to the second kVp, generate a base correction image using the first view dataset and the second view dataset, and reconstruct a pair of base material images from the first view dataset and from the second view dataset. The computer is also programmed to estimate artifact correlation in the pair of base material images using the base correction image, generate a pair of final base material images and a final monochromatic image, and correct one of the pair of final base material images and the final monochromatic image at a keV value using the estimated artifact correlation.
摘要翻译： CT系统包括发电机，其被配置为将x射线源激励到第一千伏（kVp）和第二kVp;以及计算机，其被编程为获取第一视图数据集，其中x射线源被激励到第一kVp 以及将x射线源激励到第二kVp的第二视图数据集，使用第一视图数据集和第二视图数据集生成基本校正图像，并且从第一视图数据集和第二视图数据集重构一对基本材料图像 查看数据集。 计算机还被编程为使用基本校正图像来估计一对基础材料图像中的伪像相关性，生成一对最终的基底图像和最终的单色图像，并且校正一对最终基底图像和最终的基底图像中的一个 使用估计的伪像相关性，以keV值的单色图像。
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公开(公告)号：US20120155617A1
公开(公告)日：2012-06-21
申请号：US12968393
申请日：2010-12-15
申请人： Sandeep Dutta , Naveen Chandra , Toshihiro Rifu
发明人： Sandeep Dutta , Naveen Chandra , Toshihiro Rifu
IPC分类号： G01D18/00
CPC分类号： A61B6/583 , A61B6/032 , A61B6/06 , A61B6/4266 , A61B6/482
摘要： A phantom includes a housing enclosing an interior volume and having a plurality of passages formed therein, wherein each passage is fluidly isolated from the interior volume. First and second inserts are included and configured to be positioned in a first passage of the plurality of passages and include materials having a known material density. The material is selected from iodine, hydroxyapatite (HAP), tricalcium phosphate (TCP), body fat, fatty plaque, sodium chloride (NaCl), gold (Au), and iron (Fe). The material of the inserts can be different materials or the same material at different densities.
摘要翻译： 体模包括封闭内部容积并具有形成在其中的多个通道的壳体，其中每个通道与内部容积流体隔离。 第一和第二插入件被包括并构造成定位在多个通道的第一通道中并且包括具有已知材料密度的材料。 该材料选自碘，羟基磷灰石（HAP），磷酸三钙（TCP），体脂肪，脂肪斑块，氯化钠（NaCl），金（Au）和铁（Fe）。 插入物的材料可以是不同的材料或不同密度的相同材料。
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公开(公告)号：US08199874B2
公开(公告)日：2012-06-12
申请号：US12635901
申请日：2009-12-11
申请人： Thomas L. Toth , Jiang Hsieh , Naveen Chandra , Xiaoye Wu
发明人： Thomas L. Toth , Jiang Hsieh , Naveen Chandra , Xiaoye Wu
CPC分类号： A61B6/405 , A61B6/032 , A61B6/4035 , A61B6/4241 , A61B6/4266 , A61B6/4411 , A61B6/482 , G01T1/2985 , G06T11/005 , G06T2211/408
摘要： A CT system includes a rotatable gantry having an opening for receiving an object to be scanned, and a controller configured to obtain kVp projection data at a first kVp, obtain kVp projection data at a second kVp, extract data from the kVp projection data obtained at the second kVp, add the extracted data to the kVp projection data obtained at the first kVp to generate mitigated projection data at the first kVp, and generate an image using the mitigated projection data at the first kVp and using the projection data obtained at the second kVp.
摘要翻译： CT系统包括具有用于接收待扫描物体的开口的可旋转机架，以及控制器，被配置为在第一kVp处获得kVp投影数据，在第二kVp处获得kVp投影数据，从在 第二kVp，将提取的数据加到在第一kVp处获得的kVp投影数据，以在第一kVp处产生减轻的投影数据，并使用第一kVp处的减轻投影数据并使用在第二kVp获得的投影数据生成图像 kVp。
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公开(公告)号：US20120069953A1
公开(公告)日：2012-03-22
申请号：US12887584
申请日：2010-09-22
CPC分类号： A61B6/03 , A61B6/06 , A61B6/4035 , A61B6/4042 , A61B6/4435 , A61B6/482 , G21K1/10
摘要： An imaging system includes an x-ray source that emits a beam of x-rays toward an object to be imaged, a detector that receives the x-rays attenuated by the object, a spectral notch filter positioned between the x-ray source and the object, a data acquisition system (DAS) operably connected to the detector, and a computer operably connected to the DAS and programmed to acquire a first image dataset at a first kVp, acquire a second image dataset at a second kVp that is greater than the first kVp, and generate an image of the object using the first image dataset and the second image dataset.
摘要翻译： 成像系统包括：x射线源，其向待成像物体发射X射线束;接收被物体衰减的x射线的检测器;定位在x射线源和 对象，可操作地连接到检测器的数据采集系统（DAS）和可操作地连接到DAS并被编程为在第一kVp获取第一图像数据集的计算机，在第二个kVp处获取第二个图像数据集，该第二个kVp大于 并且使用第一图像数据集和第二图像数据集生成对象的图像。
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公开(公告)号：US20110142194A1
公开(公告)日：2011-06-16
申请号：US12760862
申请日：2010-04-15
申请人： Naveen Chandra , Xiaoye Wu , Thomas L. Toth , Jiang Hsieh
发明人： Naveen Chandra , Xiaoye Wu , Thomas L. Toth , Jiang Hsieh
IPC分类号： A61B6/03
CPC分类号： A61B6/4035 , A61B6/032 , A61B6/4007 , A61B6/405 , A61B6/4241 , A61B6/482
摘要： A CT system includes a rotatable gantry having an opening for receiving an object to be scanned, and a controller configured to apply a first kVp for a first time period, apply a second kVp for a second time period, wherein the second time period is different from the first time period, acquire a first asymmetric view dataset during at least a portion of the first time period, acquire a second asymmetric view dataset during at least a portion of the second time period, and generate an image using the acquired first and second asymmetric view datasets.
摘要翻译： CT系统包括具有用于接收待扫描物体的开口的可旋转机架，以及被配置为在第一时间段施加第一kVp的控制器，在第二时间段施加第二kVp，其中第二时间段是不同的 从所述第一时间段在所述第一时间段的至少一部分期间获取第一非对称视图数据集，在所述第二时间段的至少一部分期间获取第二非对称视图数据集，并且使用所获取的第一和第二时间段生成图像 非对称视图数据集。
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公开(公告)号：US20110051888A1
公开(公告)日：2011-03-03
申请号：US12551355
申请日：2009-08-31
CPC分类号： G01N23/046 , G01N2223/419
摘要： A modular sensor assembly comprises: sensor arrays electrically coupled to a sensor substrate; a plurality of integrated circuits with sensor signal processors electrically coupled to a package substrate; and an interconnect assembly including electrical paths configured to electrically couple analog output signals from a first sensor array to a first integrated circuit and from a second sensor to a second integrated circuit, the first sensor disposed adjacent to the second sensor.
摘要翻译： 模块化传感器组件包括：电耦合到传感器基板的传感器阵列; 具有电耦合到封装衬底的传感器信号处理器的多个集成电路; 以及互连组件，其包括被配置为将来自第一传感器阵列的模拟输出信号电耦合到第一集成电路并且从第二传感器电耦合到第二集成电路的电路径，所述第一传感器邻近所述第二传感器设置。
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7.发明申请公开(公告)号：US20100329425A1
公开(公告)日：2010-12-30
申请号：US12490903
申请日：2009-06-24
CPC分类号： G01T1/247
摘要： A data acquisition system includes a charge-sensitive amplifier (CSA) configured to receive a charge from an x-ray detector, the CSA includes a high-gain electronic voltage amplifier, an electrical energy storage device coupled with the amplifier, and an electrical resistor coupled with the amplifier. The data acquisition system includes a baseline sampling circuit configured to receive an output from the CSA and to sample a baseline signal from the CSA, at least one discriminator coupled to an output of the CSA and to an output of the baseline sampling circuit, the at least one discriminator configured to output a voltage if the output of the CSA exceeds a threshold, and a counter coupled to an output of the discriminator and configured to output a digital signal indicative of a photon count received at the x-ray detector and based on the output from the CSA and on the signal from the CSA.
摘要翻译： 数据采集系统包括被配置为从X射线检测器接收电荷的电荷敏感放大器（CSA），CSA包括高增益电子电压放大器，与放大器耦合的电能存储装置和电阻器 加上放大器。 数据采集系统包括基准采样电路，其被配置为从CSA接收输出并从CSA采样基线信号，耦合到CSA的输出和基线采样电路的输出的至少一个鉴别器， 如果所述CSA的输出超过阈值，则配置成输出电压的至少一个鉴别器，以及耦合到所述鉴别器的输出并被配置为输出指示在所述x射线检测器处接收的光子计数的数字信号的计数器，并且基于 CSA的输出和CSA的信号。
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公开(公告)号：US5613774A
公开(公告)日：1997-03-25
申请号：US576339
申请日：1995-12-21
申请人： Naveen Chandra , Kenneth Tarlow
发明人： Naveen Chandra , Kenneth Tarlow
CPC分类号： A47J27/04 , A47J36/165 , A47J37/047
摘要： A cooking pot enclosing a rotatable spherical chamber includes a pot body. A cover is provided on an open top of the pot body to define an enclosed space. A removable, spherical chamber assembly is rotatably suspended within the pot body by a pair of opposite shafts. One shaft end is driven by a mating gear connected to a gear train and motor located external to the pot body. Food is placed in the spherical chamber assembly, which is then placed in the pot body. The pot body is filled with several inches of water, and placed on a stove or other heating element. The spherical chamber assembly is suspended above the boiling water, and is rotated by the motor and gear train, which causes the food to tumble and therefore cook evenly and quickly. Baffles affixed to the interior side walls of the spherical chamber assembly further enhance the mixing action.
摘要翻译： 封闭可旋转球形室的烹饪锅包括锅体。 在锅本体的开口顶部设置一个盖以限定封闭空间。 可拆卸的球形腔组件通过一对相对的轴可旋转地悬挂在锅体内。 一个轴端由连接到位于锅体外部的齿轮系和电动机的配合齿轮驱动。 将食物放置在球形室组件中，然后将其放置在锅体中。 锅身充满几英寸水，并放置在炉子或其他加热元件上。 球形室组件悬挂在沸水上方，并由马达和齿轮系转动，导致食物翻滚，因此均匀且快速地烹调。 固定到球形室组件的内侧壁的挡板进一步增强了混合动作。
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9.发明授权System and method of optimizing a representation of dual energy spectral CT images 有权优化双能谱CT图像表示的系统和方法公开(公告)号：US08787519B2
公开(公告)日：2014-07-22
申请号：US13174825
申请日：2011-07-01
CPC分类号： A61B6/482 , A61B6/032 , A61B6/4241 , A61B6/5258
摘要： An imaging system includes an x-ray source, a detector, a data acquisition system (DAS) operably connected to the detector, and a computer operably connected to the DAS. The computer is programmed to obtain CT scan data with two or more incident energy spectra, decompose the obtained CT scan data into projection CT data of a first basis material and a second basis material, generate a first basis material image and a second basis material image using the decomposed projection CT data, generate a first monochromatic image from the first basis material image and the second basis material image at a first energy that is selected based on an amount of correlated noise at the first energy, noise-reduce the first monochromatic image to generate a noise-reduced first monochromatic image, and generate a final monochromatic image based at least on the noise-reduced first monochromatic image.
摘要翻译： 成像系统包括可操作地连接到检测器的X射线源，检测器，数据采集系统（DAS）以及可操作地连接到DAS的计算机。 计算机被编程以获得具有两个或更多个入射能谱的CT扫描数据，将获得的CT扫描数据分解成第一基材和第二基材的投影CT数据，生成第一基材图像和第二基材图像 使用分解的投影CT数据，以基于第一能量处的相关噪声量选择的第一能量从第一基材图像和第二基材图像生成第一单色图像，降低第一单色图像 以产生噪声减小的第一单色图像，并且至少基于噪声减小的第一单色图像生成最终单色图像。
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公开(公告)号：US08503750B2
公开(公告)日：2013-08-06
申请号：US12574502
申请日：2009-10-06
IPC分类号： A61B6/03
CPC分类号： G06T11/005 , A61B6/5258
摘要： A method and apparatus include acquisition of a view dataset based on x-rays received by a detector corresponding to a energy level, reconstruction of an initial image using the view dataset, the initial image comprising a plurality of metal voxels at respective metal voxel locations, and generation of a metal mask corresponding to the plurality of metal voxels within the initial image. The method and apparatus also include forward projection of the metal mask onto the view dataset to identify metal dexels in the view dataset, performance of a weighted interpolation based on the identified metal dexels to generate a completed view dataset, reconstruction of a final image using the completed view dataset, the final image comprising a plurality of image voxels corresponding to the metal voxel locations, and replacement of a portion of the plurality of image voxels corresponding to the metal voxel locations with smoothed metal values.
摘要翻译： 一种方法和装置包括：基于由能量级对应的检测器接收的X射线获取视图数据集，使用视图数据集重构初始图像，初始图像包括在相应的金属体素位置处的多个金属体素， 以及生成与初始图像内的多个金属体素相对应的金属掩模。 所述方法和装置还包括将金属掩模向视图数据集向前投影以识别视图数据集中的金属像素，基于所识别的金属像素来执行加权内插以生成完整的视图数据集，使用 完成的视图数据集，最终图像包括对应于金属体元位置的多个图像体素，以及用平滑的金属值替换与金属体元位置相对应的多个图像体素的一部分。
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