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    Methods and apparatus for data communication across a slip ring
    3.
    发明授权
    Methods and apparatus for data communication across a slip ring 有权

    公开(公告)号：US08983163B2

    公开(公告)日：2015-03-17

    申请号：US13586337

    申请日：2012-08-15

    申请人： Naveen Stephan Chandra

    发明人： Naveen Stephan Chandra

    IPC分类号： G06K9/00 ,  A61B6/00 ,  A61B6/03

    CPC分类号： H04N19/136 ,  A61B6/035 ,  A61B6/4028 ,  A61B6/56

    摘要： A method for reducing bandwidth required for transmission of data in a device having two portions rotating with respect to one another. The first portion includes a data acquisition system (DAS) having a charge-to-digital converter and a digital signal processor (DSP) configured to receive and compress digital data from the charge-to-digital processor. The second portion includes a computer configured to receive data from the DAS. The DAS and computer are communicatively coupled via a slip ring having a finite transmission bandwidth. The computer is configured to reconstruct and display an image using compressed data. The method includes using the DAS to compress scan data to a predetermined number of mantissa bits and a predetermined number of exponent bits, transmitting the compressed data from the first portion to the second portion across the slip ring, and using the transmitted compressed data to reconstruct and display an image of an object.

    SYSTEMS AND METHODS FOR MULTICHANNEL NOISE REDUCTION
    4.
    发明申请
    SYSTEMS AND METHODS FOR MULTICHANNEL NOISE REDUCTION 有权
    多通道噪声减少的系统和方法

    公开(公告)号：US20120183108A1

    公开(公告)日：2012-07-19

    申请号：US13009469

    申请日：2011-01-19

    申请人： Suresh Narayanan Narayanan ,  Naveen Stephan Chandra ,  Jiahua Fan

    发明人： Suresh Narayanan Narayanan ,  Naveen Stephan Chandra ,  Jiahua Fan

    IPC分类号： H04B1/10

    CPC分类号： H04B1/10

    摘要： Systems and methods for multichannel noise reduce are provided. One method includes acquiring a multichannel signal, obtaining a noise correlation between a plurality of channels of the multichannel signal, and obtaining a signal characteristic in each of the plurality of channels. The method also includes removing signal noise based on (i) the correlated noise and (ii) at least one of an uncorrelated noise in each channel or the obtained signal characteristic in each channel.

    摘要翻译： 提供了多通道噪声减少的系统和方法。 一种方法包括获取多信道信号，获得多信道信号的多个信道之间的噪声相关性，并获得多个信道中的每个信道中的信号特性。 该方法还包括基于（i）相关噪声和（ii）每个信道中的不相关噪声中的至少一个或每个信道中获得的信号特性来去除信号噪声。

    Methods and apparatus for data communication across a slip ring
    5.
    发明授权
    Methods and apparatus for data communication across a slip ring 有权
    用于跨滑环进行数据通信的方法和装置

    公开(公告)号：US08260019B2

    公开(公告)日：2012-09-04

    申请号：US11893731

    申请日：2007-08-17

    申请人： Naveen Stephan Chandra

    发明人： Naveen Stephan Chandra

    IPC分类号： G06K9/00

    CPC分类号： H04N19/136 ,  A61B6/035 ,  A61B6/4028 ,  A61B6/56

    摘要： A method for reducing bandwidth required for transmission of data in a device having two portions rotating with respect to one another. The first portion includes a data acquisition system (DAS) having a charge-to-digital converter and a digital signal processor (DSP) configured to receive and compress digital data from the charge-to-digital processor. The second portion includes a computer configured to receive data from the DAS. The DAS and computer are communicatively coupled via a slip ring having a finite transmission bandwidth. The computer is configured to reconstruct and display an image using compressed data. The method includes using the DAS to compress scan data to a predetermined number of mantissa bits and a predetermined number of exponent bits, transmitting the compressed data from the first portion to the second portion across the slip ring, and using the transmitted compressed data to reconstruct and display an image of an object.

    摘要翻译： 一种用于减少在具有相对于彼此旋转的部分的设备中传输数据所需的带宽的方法。 第一部分包括具有电荷数字转换器和数字信号处理器（DSP）的数据采集系统（DAS），数字信号处理器（DSP）被配置为从电荷到数字处理器接收和压缩数字数据。 第二部分包括被配置为从DAS接收数据的计算机。 DAS和计算机通过具有有限传输带宽的滑环进行通信耦合。 计算机被配置为使用压缩数据来重建和显示图像。 该方法包括使用DAS将扫描数据压缩到预定数量的尾数位和预定数量的指数位，将压缩数据从第一部分传送到穿过滑环的第二部分，并使用传输的压缩数据重建 并显示对象的图像。

    NOISE REDUCTION METHOD FOR DUAL-ENERGY IMAGING
    6.
    发明申请
    NOISE REDUCTION METHOD FOR DUAL-ENERGY IMAGING 有权
    用于双能量成像的噪声减少方法

    公开(公告)号：US20110158498A1

    公开(公告)日：2011-06-30

    申请号：US12650116

    申请日：2009-12-30

    申请人： Baojun Li ,  Naveen Stephan Chandra ,  Jed Douglas Pack ,  Jiang Hsieh ,  Xiaoye Wu ,  Mary Sue Kulpins

    发明人： Baojun Li ,  Naveen Stephan Chandra ,  Jed Douglas Pack ,  Jiang Hsieh ,  Xiaoye Wu ,  Mary Sue Kulpins

    IPC分类号： G06K9/62

    CPC分类号： G06T11/008 ,  G06T2211/408

    摘要： A method is provided that includes acquiring a first set of image data from X-rays produced at a first energy level and a second set of image data from X-rays produced at a second energy level. The method includes generating a first noise mask for a first basis material and a second noise mask for a second basis material and removing pixels corresponding to cross contaminating structural information from the first noise mask and the second noise mask. The method includes processing a first materially decomposed image generated from the first set of image data and the second set of digital data using the second noise mask after removal of the cross contaminating structural information and processing a second MD image generated from the first set of image data and the second set of digital data using the first noise mask after removal of the cross contaminating structural information.

    摘要翻译： 提供了一种方法，其包括从在第二能量级产生的X射线以从第一能量级产生的X射线和第二组图像数据获取第一组图像数据。 该方法包括为第一基材生成第一噪声掩模和第二基材的第二噪声掩模，并从第一噪声掩模和第二噪声掩模去除对应于交叉污染结构信息的像素。 该方法包括在去除交叉污染的结构信息之后处理从第一组图像数据和第二组数字数据生成的第一物理分解图像，并且处理从第一组图像生成的第二MD图像 数据和第二组数字数据，在去除交叉污染结构信息之后使用第一噪声掩模。

    Methods and apparatus for data communication across a slip ring
    7.
    发明申请
    Methods and apparatus for data communication across a slip ring 有权
    用于跨滑环进行数据通信的方法和装置

    公开(公告)号：US20090046913A1

    公开(公告)日：2009-02-19

    申请号：US11893731

    申请日：2007-08-17

    申请人： Naveen Stephan Chandra

    发明人： Naveen Stephan Chandra

    IPC分类号： G06K9/00

    CPC分类号： H04N19/136 ,  A61B6/035 ,  A61B6/4028 ,  A61B6/56

    摘要： A method for reducing bandwidth required for transmission of data in a device having two portions rotating with respect to one another. The first portion includes a data acquisition system (DAS) having a charge-to-digital converter and a digital signal processor (DSP) configured to receive and compress digital data from the charge-to-digital processor. The second portion includes a computer configured to receive data from the DAS. The DAS and computer are communicatively coupled via a slip ring having a finite transmission bandwidth. The computer is configured to reconstruct and display an image using compressed data. The method includes using the DAS to compress scan data to a predetermined number of mantissa bits and a predetermined number of exponent bits, transmitting the compressed data from the first portion to the second portion across the slip ring, and using the transmitted compressed data to reconstruct and display an image of an object.

    摘要翻译： 一种用于减少在具有相对于彼此旋转的部分的设备中传输数据所需的带宽的方法。 第一部分包括具有电荷数字转换器和数字信号处理器（DSP）的数据采集系统（DAS），数字信号处理器（DSP）被配置为从电荷到数字处理器接收和压缩数字数据。 第二部分包括被配置为从DAS接收数据的计算机。 DAS和计算机通过具有有限传输带宽的滑环进行通信耦合。 计算机被配置为使用压缩数据来重建和显示图像。 该方法包括使用DAS将扫描数据压缩到预定数量的尾数位和预定数量的指数位，将压缩数据从第一部分传送到穿过滑环的第二部分，并使用传输的压缩数据重建 并显示对象的图像。

    Noise reduction method for dual-energy imaging
    9.
    发明授权
    Noise reduction method for dual-energy imaging 有权
    双能量成像降噪方法

    公开(公告)号：US08396273B2

    公开(公告)日：2013-03-12

    申请号：US12650116

    申请日：2009-12-30

    申请人： Baojun Li ,  Naveen Stephan Chandra ,  Jed Douglas Pack ,  Jiang Hsieh ,  Xiaoye Wu ,  Mary Sue Kulpins

    发明人： Baojun Li ,  Naveen Stephan Chandra ,  Jed Douglas Pack ,  Jiang Hsieh ,  Xiaoye Wu ,  Mary Sue Kulpins

    IPC分类号： G06K9/00

    CPC分类号： G06T11/008 ,  G06T2211/408

    摘要： A method is provided that includes acquiring a first set of image data from X-rays produced at a first energy level and a second set of image data from X-rays produced at a second energy level. The method includes generating a first noise mask for a first basis material and a second noise mask for a second basis material and removing pixels corresponding to cross contaminating structural information from the first noise mask and the second noise mask. The method includes processing a first materially decomposed image generated from the first set of image data and the second set of digital data using the second noise mask after removal of the cross contaminating structural information and processing a second MD image generated from the first set of image data and the second set of digital data using the first noise mask after removal of the cross contaminating structural information.

    摘要翻译： 提供了一种方法，其包括从在第二能量级产生的X射线以从第一能量级产生的X射线和第二组图像数据获取第一组图像数据。 该方法包括为第一基材生成第一噪声掩模和第二基材的第二噪声掩模，并从第一噪声掩模和第二噪声掩模去除对应于交叉污染结构信息的像素。 该方法包括在去除交叉污染的结构信息之后处理从第一组图像数据和第二组数字数据生成的第一物理分解图像，并且处理从第一组图像生成的第二MD图像 数据和第二组数字数据，在去除交叉污染结构信息之后使用第一噪声掩模。

    SYSTEM AND METHOD OF ACQUIRING COMPUTED TOMOGRAPHY DATA USING A MULTI-ENERGY X-RAY SOURCE
    10.
    发明申请
    SYSTEM AND METHOD OF ACQUIRING COMPUTED TOMOGRAPHY DATA USING A MULTI-ENERGY X-RAY SOURCE 审中-公开
    使用多能量X射线源获取计算机图像数据的系统和方法

    公开(公告)号：US20130003912A1

    公开(公告)日：2013-01-03

    申请号：US13174485

    申请日：2011-06-30

    申请人： Bruno Kristiaan Bernard De Man ,  Jiang Hsieh ,  Naveen Stephan Chandra ,  Jiahua Fan ,  Jed Douglas Pack

    发明人： Bruno Kristiaan Bernard De Man ,  Jiang Hsieh ,  Naveen Stephan Chandra ,  Jiahua Fan ,  Jed Douglas Pack

    IPC分类号： A61B6/03 ,  G01N23/04

    CPC分类号： A61B6/482 ,  A61B6/032 ,  A61B6/405

    摘要： The subject matter disclosed herein relates to X-ray imaging systems, and more specifically, to multi-energy computed tomography (CT) X-ray imaging systems. In an embodiment, a multi-energy computed tomography (CT) imaging system includes an X-ray source that emits X-rays upon the application of a low stable bias, a high stable bias, and transitional biases between the low stable bias and the high stable bias. The imaging system also includes an X-ray detector configured to produce an electrical signal corresponding to the intensity of the X-rays emitted by the X-ray source that reach the X-ray detector. The imaging system also includes data processing circuitry configured to acquire a first set of data corresponding to the electrical signal produced by the X-ray detector only when the low stable bias or the high stable bias is applied to the X-ray source. The imaging system also includes a processor configured to process the first set of acquired data and construct one or more multi-energy CT images.

    摘要翻译： 本文公开的主题涉及X射线成像系统，更具体地，涉及多能计算机断层摄影（CT）X射线成像系统。 在一个实施例中，多能量计算机断层摄影（CT）成像系统包括在施加低稳定偏压，高稳定偏差以及低稳定偏压和低稳定偏差之间的过渡偏差时发射X射线的X射线源 高稳定偏差。 成像系统还包括：X射线检测器，被配置为产生对应于由X射线源发射的X射线的强度的电信号，该X射线到达X射线检测器。 成像系统还包括数据处理电路，其被配置为仅当低稳定偏压或高稳定偏压施加到X射线源时才获取对应于由X射线检测器产生的电信号的第一组数据。 成像系统还包括被配置为处理第一组获取的数据并构造一个或多个多能CT图像的处理器。