利索-全球专利检索

  1. 登录
  2. 注册

搜索结果

92 条记录 (耗时 0.031 秒)

    Modular solid-state detector cell
    1.
    发明授权
    Modular solid-state detector cell 失效
    模块化固态检测器单元

    公开(公告)号：US4417144A

    公开(公告)日：1983-11-22

    申请号：US236738

    申请日：1981-02-23

    申请人： David M. Hoffman ,  Neil W. Loomis ,  Ralph C. Ehlert ,  Peter S. Shelley

    发明人： David M. Hoffman ,  Neil W. Loomis ,  Ralph C. Ehlert ,  Peter S. Shelley

    IPC分类号： A61B6/03 ,  G01T1/20 ,  G01T1/29 ,  G01T1/22

    CPC分类号： G01T1/2928 ,  G01T1/2018

    摘要： A modular solid-state detector cell which intimately associates a scintillator body with a pair of photoresponsive semiconductors so as to present on a single collimator plate all of the elements necessary for transforming incident X-radiation into a measurable electrical signal. The detector is provided with a precision slotted mounting arrangement for receiving the unit cells, and the cells when positioned within the detector assembly have the photoresponsive semiconductors enclosed within the light tight cell. The unit is adaptable to off-line testing of the separate cells for screening before assembly.

    摘要翻译： 模块化固态检测器单元，其将闪烁体与一对光响应半导体紧密地相关联，以便在单个准直器板上呈现将入射的X射线变换成可测量的电信号所需的所有元件。 检测器设置有用于接收单元电池的精密开槽安装装置，并且当定位在检测器组件内时的电池具有封闭在不透光单元内的光响应半导体。 该装置适用于组装前分离单元的离线测试以进行筛选。

    Optical potting of solid-state detector cells
    2.
    发明授权
    Optical potting of solid-state detector cells 失效
    固态检测器电池的光学灌封

    公开(公告)号：US4491732A

    公开(公告)日：1985-01-01

    申请号：US411419

    申请日：1982-08-25

    申请人： Dennis H. Pritzkow ,  Neil W. Loomis ,  Thomas M. Golner ,  David M. Hoffman

    发明人： Dennis H. Pritzkow ,  Neil W. Loomis ,  Thomas M. Golner ,  David M. Hoffman

    IPC分类号： G01T1/164 ,  G01T1/20

    CPC分类号： G01T1/2018 ,  G01T1/1644

    摘要： In a modular solid state detector of the type including a scintillator and diodes for converting x-ray flux to a measurable electrical signal, the diodes are mounted out of the path of incident x-radiation to minimize noise and to limit degradation. The resulting configuration reduces efficiency because the active diode area is limited and the length of the light path between the scintillator and diode is increased. In order to compensate for that reduction in efficiency, optical potting material is used to join the scintillator to the diodes in order to minimize light attenuation between those elements. In addition, the outer surface of the cured optical potting material is coated with a thin specular layer of silver to keep the light within the optical potting material and thus most efficiently reflected from the scintillator to the diode.

    摘要翻译： 在包括用于将x射线通量转换成可测量电信号的闪烁体和二极管的模块化固态检测器中，二极管被安装在入射x辐射的路径之外，以使噪声最小化并限制退化。 所产生的配置降低了效率，因为有源二极管面积是有限的，并且闪烁体和二极管之间的光路长度增加。 为了补偿效率的降低，使用光封装材料将闪烁体连接到二极管，以便使这些元件之间的光衰减最小化。 此外，固化的光封装材料的外表面涂覆有薄的镜面银层，以将光保持在光封装材料内，从而最有效地从闪烁体反射到二极管。

    Multi-cell detector using printed circuit board
    3.
    发明授权
    Multi-cell detector using printed circuit board 失效
    多单元检测器采用印刷电路板

    公开(公告)号：US4161655A

    公开(公告)日：1979-07-17

    申请号：US855532

    申请日：1977-11-28

    申请人： Dennis J. Cotic ,  David M. Hoffman ,  Peter S. Shelley ,  Laurel J. Zech

    发明人： Dennis J. Cotic ,  David M. Hoffman ,  Peter S. Shelley ,  Laurel J. Zech

    IPC分类号： G01N23/04 ,  A61B6/00 ,  A61B6/03 ,  G01T1/185 ,  H01J47/02 ,  G01T1/18

    CPC分类号： H01J47/02

    摘要： An array of electrode plates are arranged in parallel and spaced apart relationship to define ionization cells in a channel within a housing that is occupied by high pressured gas. A broad beam of x-ray photons penetrates a window in the housing and produces ionization events that result in analog signals corresponding with photon energies and intensities. Conduction of the signals from the interior to the exterior of the detector housing is accomplished with a printed circuit board assembly that is sealed between the housing and its cover.

    摘要翻译： 电极板阵列被平行排列并且间隔开来，以在由高压气体占据的壳体内的通道中限定电离细胞。 宽光束的X射线光子穿透壳体中的窗口并产生电离事件，其导致与光子能量和强度对应的模拟信号。 信号从传感器壳体的内部传导到外部是通过密封在外壳和其盖之间的印刷电路板组件实现的。

    Cast collimators for CT detectors and methods of making same
    5.
    发明授权
    Cast collimators for CT detectors and methods of making same 失效
    用于CT探测器的投射准直仪及其制作方法

    公开(公告)号：US07609804B2

    公开(公告)日：2009-10-27

    申请号：US11552477

    申请日：2006-10-24

    申请人： David M. Hoffman

    发明人： David M. Hoffman

    IPC分类号： A61B6/03

    CPC分类号： G21K1/025

    摘要： Cast collimators for use in CT imaging systems are described, as are methods of making them. Such collimators may comprise pre-patient collimators, pre-patient filter/collimator assemblies, and/or post-patient collimators. The filters and/or collimators may be made of any suitable high-density, high atomic number material such as lead, a lead alloy, tantalum, tungsten, tungsten suspended in an epoxy matrix, tungsten suspended in a slurry, or the like. Embodiments of these collimators comprise specially-designed channels and vanes that allow them to be precision cast to the necessary degree of accuracy. These channels and vanes are preferably tapered. These collimators and filter/collimator assemblies help minimize the x-ray dose to the patient by minimizing the scattered radiation creation mechanism and by collimating out much of the scattered radiation that would otherwise be subjected to the patient. These collimators may be cast as either single piece structures, or multiple pieces that can be operatively connected together.

    摘要翻译： 描述了用于CT成像系统的投射准直仪，以及制作它们的方法。 这种准直器可以包括患者前准直仪，患者前过滤器/准直器组件和/或患者后准直仪。 过滤器和/或准直器可以由任何合适的高密度，高原子序数的材料制成，例如铅，铅合金，钽，钨，悬浮在环氧基体中的钨，悬浮在浆液中的钨等。 这些准直器的实施例包括专门设计的通道和叶片，使得它们能够精确地铸造到必要的精度。 这些通道和叶片优选是锥形的。 这些准直器和过滤器/准直器组件通过最小化散射辐射产生机制并且通过准直许多否则将经受患者的散射辐射来帮助使患者的x射线剂量最小化。 这些准直器可以被铸造为单件结构，或者可以可操作地连接在一起的多个件。

    Energy discriminating detector with direct conversion layer and indirect conversion layer
    6.
    发明授权
    Energy discriminating detector with direct conversion layer and indirect conversion layer 有权
    能量鉴别检测器，具有直接转换层和间接转换层

    公开(公告)号：US07532703B2

    公开(公告)日：2009-05-12

    申请号：US11692304

    申请日：2007-03-28

    申请人： Yanfeng Du ,  J. Eric Tkaczyk ,  David M. Hoffman

    发明人： Yanfeng Du ,  J. Eric Tkaczyk ,  David M. Hoffman

    IPC分类号： A61B6/00

    CPC分类号： G01T1/2985 ,  A61B6/032 ,  A61B6/4241 ,  A61B6/482 ,  G01T1/20 ,  G01T1/2018 ,  G01T1/242 ,  G01T1/249

    摘要： A diagnostic imaging system includes a high frequency electromagnetic energy source that emits a beam of high frequency electromagnetic energy toward an object to be imaged. An energy discriminating (ED) detector receives high frequency electromagnetic energy emitted by the high frequency electromagnetic energy source. The ED detector includes a direct conversion layer dynamically operable in a photon counting mode in one view and in an integrating mode in another view and an indirect conversion layer. A data acquisition system (DAS) is operably connected to the ED detector and a computer operably connected to the DAS.

    摘要翻译： 诊断成像系统包括向待成像对象发射高频电磁能束的高频电磁能源。 能量识别（ED）检测器接收由高频电磁能源发出的高频电磁能。 ED检测器包括在一个视图中以在另一视图和间接转换层中的积分模式中以光子计数模式动态操作的直接转换层。 数据采集​​系统（DAS）可操作地连接到ED检测器和可操作地连接到DAS的计算机。

    ENERGY DISCRIMINATING DETECTOR WITH DIRECT CONVERSION LAYER AND INDIRECT CONVERSION LAYER
    7.
    发明申请
    ENERGY DISCRIMINATING DETECTOR WITH DIRECT CONVERSION LAYER AND INDIRECT CONVERSION LAYER 有权
    具有直接转换层和间接转换层的能量鉴别探测器

    公开(公告)号：US20080240339A1

    公开(公告)日：2008-10-02

    申请号：US11692304

    申请日：2007-03-28

    申请人： Yanfeng Du ,  J. Eric Tkaczyk ,  David M. Hoffman

    发明人： Yanfeng Du ,  J. Eric Tkaczyk ,  David M. Hoffman

    IPC分类号： A61B6/00 ,  G01T1/161

    CPC分类号： G01T1/2985 ,  A61B6/032 ,  A61B6/4241 ,  A61B6/482 ,  G01T1/20 ,  G01T1/2018 ,  G01T1/242 ,  G01T1/249

    摘要： A diagnostic imaging system includes a high frequency electromagnetic energy source that emits a beam of high frequency electromagnetic energy toward an object to be imaged. An energy discriminating (ED) detector receives high frequency electromagnetic energy emitted by the high frequency electromagnetic energy source. The ED detector includes a direct conversion layer dynamically operable in a photon counting mode in one view and in an integrating mode in another view and an indirect conversion layer. A data acquisition system (DAS) is operably connected to the ED detector and a computer operably connected to the DAS.

    摘要翻译： 诊断成像系统包括向待成像对象发射高频电磁能束的高频电磁能源。 能量识别（ED）检测器接收由高频电磁能源发出的高频电磁能。 ED检测器包括在一个视图中以在另一视图和间接转换层中的积分模式中以光子计数模式动态操作的直接转换层。 数据采集​​系统（DAS）可操作地连接到ED检测器和可操作地连接到DAS的计算机。

    System and method of collecting imaging subject positioning information for x-ray flux control
    8.
    发明授权
    System and method of collecting imaging subject positioning information for x-ray flux control 有权
    用于x射线通量控制的成像对象定位信息的采集系统和方法

    公开(公告)号：US07313217B2

    公开(公告)日：2007-12-25

    申请号：US10765618

    申请日：2004-01-27

    申请人： Thomas L. Toth ,  David M. Hoffman

    发明人： Thomas L. Toth ,  David M. Hoffman

    IPC分类号： G01N23/00

    CPC分类号： A61B6/032 ,  A61B6/4035 ,  A61B6/4241 ,  A61B6/4488 ,  A61B6/469 ,  A61B6/488 ,  A61B6/544 ,  A61B6/583

    摘要： A system and method of diagnostic imaging is provided that includes positioning a subject in an imaging device, collecting positioning information of the subject from at least one sensor disposed in proximity of the imaging device, and determining a relative position of the subject within the imaging device from at least the position information. The present invention automatically selects a proper attenuation filter configuration, corrects patient centering, and corrects noise prediction errors, thereby increasing dose efficiency and tube output.

    摘要翻译： 提供了诊断成像的系统和方法，其包括将成像装置定位在成像装置中，从设置在成像装置附近的至少一个传感器收集对象的定位信息，以及确定成像装置内的对象的相对位置 至少从位置信息。 本发明自动选择适当的衰减滤波器配置，校正患者居中，并且校正噪声预测误差，从而提高剂量效率和管输出。