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公开(公告)号：US06344649B2
公开(公告)日：2002-02-05
申请号：US08977439
申请日：1997-11-26
申请人： Robert J. Riedner , Erdogan O. Gurmen , David M. Hoffman , August O. Englert , Timothy J. Sporer , Matthew R. Schedler
发明人： Robert J. Riedner , Erdogan O. Gurmen , David M. Hoffman , August O. Englert , Timothy J. Sporer , Matthew R. Schedler
IPC分类号： G01T120
CPC分类号： G01N23/04 , G01T1/2002 , G01T1/202
摘要： Apparatus and methods for fabricating scintillators for use in a CT systems are described. Adjacent scintillator elements are separated by gaps filled with a composition of white diffuse reflective material, a light absorber, and a castable polymer. The composition increases the strength of the signal to the photodiode by minimizing the amount of light that is lost by the scintillator elements. Additionally, the light absorber minimizes the amount of light transferred between adjacent scintillator elements to limit cross-talk. In addition, the outer edges of the scintillator may have a lower amount of light absorber to compensate for the light lost from the periphery.
摘要翻译： 描述了用于制造用于CT系统的闪烁体的装置和方法。 相邻的闪烁体元件由填充有白色漫反射材料，光吸收剂和可浇注聚合物的组合物的间隙分开。 组合物通过使闪烁体元件损失的光量最小化来增加信号对光电二极管的强度。 另外，光吸收器最小化在相邻的闪烁体元件之间传输的光的量以限制串扰。 此外，闪烁器的外边缘可以具有较少量的光吸收器，以补偿从周边损失的光。
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公开(公告)号：US5799057A
公开(公告)日：1998-08-25
申请号：US773083
申请日：1996-12-26
CPC分类号： A61B6/032 , A61B6/06 , A61B6/4291 , G01N23/046 , G01N2223/419
摘要： The present invention, in one form, is a scatter collimator for a computed tomography system including an x-ray source. The scatter collimator is positioned between a detector array and an object to be imaged. The scatter collimator includes a housing, a plurality of attenuating blades and a plurality of attenuating wires. The blades and wires are mounted to the housing, and oriented substantially perpendicular to each other. Particularly, the blades and wires form a two-dimensional shielding grid. The blades also are oriented so that they are radially and focally aligned with the x-ray source. A detector element of the detector array is secured to the housing so that the blades and wires are between the detector element and the x-ray source. The detector element, in one form, includes a scintillation element which is coated with a light-retaining material.
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公开(公告)号：US6137857A
公开(公告)日：2000-10-24
申请号：US979011
申请日：1997-11-26
CPC分类号： A61B6/5205 , A61B6/032 , G01T1/2985 , G21K1/025
摘要： A multislice detector array producing an alterable quantity of slices and slice resolutions. In one embodiment, the detector array includes a detector housing, a plurality of detector modules, and a collimator. Each detector module includes a plurality of photodiodes arranged in an array of rows and columns, a switch apparatus electrically coupled to the photodiode output signals, and a decoder. The collimator is configured to separate X-ray beams so that only the focal X-ray beams are impinged upon the detector modules.
摘要翻译： 多分辨率检测器阵列产生切片和切片分辨率的可变量。 在一个实施例中，检测器阵列包括检测器壳体，多个检测器模块和准直器。 每个检测器模块包括布置成行和列阵列的多个光电二极管，电耦合到光电二极管输出信号的开关装置和解码器。 准直器被配置为分离X射线束，使得只有焦点X射线束撞击在检测器模块上。
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公开(公告)号：US6144718A
公开(公告)日：2000-11-07
申请号：US979924
申请日：1997-11-26
CPC分类号： G01T1/2985
摘要： A flexible cable connection for a detector module is described. The flexible cable allows photodiode output signals to be coupled to the CT system without the need of attaching a pin connector to the photodiode outputs. Wires from the flexible cable are wire bonded to the photodiode output signals eliminating possible damage to the photodiode when the pin connector is attached.
摘要翻译： 描述了用于检测器模块的柔性电缆连接。 柔性电缆允许光电二极管输出信号耦合到CT系统，而无需将引脚连接器连接到光电二极管输出端。 来自柔性电缆的导线被连接到光电二极管输出信号上，消除了在连接针连接器时对光电二极管的可能损坏。
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5.发明授权Direct conversion energy discriminating CT detector with over-ranging correction 失效直接转换能量鉴别CT检测器具有超范围校正公开(公告)号：US07697659B2
公开(公告)日：2010-04-13
申请号：US12194072
申请日：2008-08-19
IPC分类号： A61B6/03
CPC分类号： G01T1/2928 , A61B6/032 , A61B6/4241 , A61B6/5205
摘要： A CT detector capable of energy discrimination and direct conversion is disclosed. The detector includes multiple layers of semiconductor material with the layers having varying thicknesses. The detector is constructed to be segmented in the x-ray penetration direction so as to optimize count rate performance as well as avoid saturation. The detector also includes variable pixel pitch and a flexible binning of pixels to further enhance count rate performance.
摘要翻译： 公开了能够鉴别和直接转换的CT检测器。 检测器包括多层半导体材料，其中层具有变化的厚度。 检测器被构造成在x射线穿透方向上分段，以便优化计数率性能以及避免饱和。 检测器还包括可变像素间距和灵活的像素分组，以进一步提高计数率性能。
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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。
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7.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。
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8.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
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。
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9.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。
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公开(公告)号：US07173998B2
公开(公告)日：2007-02-06
申请号：US11423277
申请日：2006-06-09
申请人： David M. Hoffman , Michael F. Hoge
发明人： David M. Hoffman , Michael F. Hoge
IPC分类号： H05G1/64
CPC分类号： G01T1/2018 , A61B6/032 , A61B6/4291 , G01N23/046 , G01N2223/419 , G01N2223/612 , G01T1/2002 , G01T1/202 , G01T1/2985
摘要： The present invention is a directed to a CT detector for a CT imaging system that incorporates a segmented optical coupler between a photodiode array and a scintillator array. The segmented optical coupler also operates as a light collimator which improves the light collection efficiency of the photodiode array. The segmented optical coupler is defined by a series of reflector elements that collectively form a plurality of open cells. The open cells form light transmission cavities and facilitate the collimation of light from a scintillator to a photodiode. The cavities may be filled with optical epoxy for sealing to the photodiode array.
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