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    • 1. 发明授权
    • Cooking pot enclosing rotatable spherical chamber
    • 烹饪锅包围可旋转的球形室
    • US5613774A
    • 1997-03-25
    • US576339
    • 1995-12-21
    • Naveen ChandraKenneth Tarlow
    • Naveen ChandraKenneth Tarlow
    • A47J27/04A47J36/16A47J37/04B01F9/02
    • A47J27/04A47J36/165A47J37/047
    • 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.
    • 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。
    • 2. 发明授权
    • System and method of optimizing a representation of dual energy spectral CT images
    • 优化双能谱CT图像表示的系统和方法
    • US08787519B2
    • 2014-07-22
    • US13174825
    • 2011-07-01
    • Jiahua FanNaveen ChandraBruno Kristiaan Bernard De Man
    • Jiahua FanNaveen ChandraBruno Kristiaan Bernard De Man
    • A61B6/03A61B6/00
    • A61B6/482A61B6/032A61B6/4241A61B6/5258
    • 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.
    • 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。
    • 3. 发明授权
    • Method and apparatus for reduction of metal artifacts in CT images
    • 减少CT图像中金属伪影的方法和装置
    • US08503750B2
    • 2013-08-06
    • US12574502
    • 2009-10-06
    • Thomas Matthew BensonNaveen ChandraDavid Allen Langan
    • Thomas Matthew BensonNaveen ChandraDavid Allen Langan
    • A61B6/03
    • G06T11/005A61B6/5258
    • 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.
    • 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。
    • 4. 发明授权
    • Readout electronics for photon counting and energy discriminating detectors
    • 用于光子计数和能量鉴别检测器的读出电子装置
    • US08384038B2
    • 2013-02-26
    • US12490903
    • 2009-06-24
    • Jianjun GuoNaresh Kesavan RaoJohn Eric TkaczykYanfeng DuNaveen Chandra
    • Jianjun GuoNaresh Kesavan RaoJohn Eric TkaczykYanfeng DuNaveen Chandra
    • G01T1/24
    • G01T1/247
    • 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.
    • 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。
    • 5. 发明授权
    • Apparatus and method for calibrating an X-ray tube
    • 用于校准X射线管的装置和方法
    • US08265227B2
    • 2012-09-11
    • US12646320
    • 2009-12-23
    • John Moore BoudrySergio LemaitreNaveen Chandra
    • John Moore BoudrySergio LemaitreNaveen Chandra
    • H05G1/34H05G1/50H05G1/08
    • H05G1/46
    • An apparatus and method for calibrating an x-ray tube include a computer programmed to acquire a starter voltage/current value corresponding to a width, a length, or a position of a target focal spot capable of being generated by the x-ray tube. The computer is programmed to generate an electron beam and to steer the electron beam based on the starter voltage/current value. The computer is also programmed to steer the electron beam based on a value adjusted from the starter voltage/current value. The computer is programmed to calculate a final voltage/current value that is configured to generate the width, length, or position of the target focal spot based on the starter voltage/current value and the adjusted starter voltage/current value.
    • 用于校准X射线管的装置和方法包括被编程为获取对应于能够由X射线管产生的目标焦斑的宽度,长度或位置的起动器电压/电流值的计算机。 计算机被编程为产生电子束并且基于起动器电压/电流值来控制电子束。 计算机还被编程为基于从起动电压/电流值调整的值来引导电子束。 计算机被编程为基于起动器电压/电流值和调整的启动器电压/电流值来计算被配置为产生目标焦点的宽度,长度或位置的最终电压/电流值。