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公开(公告)号：US07054408B2
公开(公告)日：2006-05-30
申请号：US10249694
申请日：2003-04-30
CPC分类号： G01T1/2985 , A61B6/032 , A61B6/4233 , G01N23/046 , G01N2223/419 , G01T1/1644 , G01T1/201 , G21K1/02
摘要： The present invention is a directed to a non-pixelated scintillator array for a CT detector as well as an apparatus and method of manufacturing same. The scintillator array is comprised of a number of ceramic fibers or single crystal fibers that are aligned in parallel with respect to one another. As a result, the pack has very high dose efficiency. Furthermore, each fiber is designed to direct light out to a photodiode with very low scattering loss. The fiber size (cross-sectional diameter) may be controlled such that smaller fibers may be fabricated for higher resolution applications. Moreover, because the fiber size can be controlled to be consistent throughout the scintillator may and the fibers are aligned in parallel with one another, the scintillator array, as a whole, also is uniform. Therefore, precise alignment with the photodiode array or the collimator assembly is not necessary.
摘要翻译： 本发明涉及一种用于CT检测器的非像素化闪烁体阵列以及其制造方法。 闪烁体阵列包括相对于彼此平行对准的多个陶瓷纤维或单晶纤维。 因此，该包装具有非常高的剂量效率。 此外，每个光纤被设计成将光引导到具有非常低的散射损耗的光电二极管。 可以控制纤维尺寸（横截面直径），使得可以制造更小的纤维用于更高分辨率的应用。 此外，由于可以将整个闪烁器可以控制纤维尺寸一致，并且纤维彼此平行排列，所以闪烁体阵列整体上也是均匀的。 因此，不需要与光电二极管阵列或准直器组件的精确对准。
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公开(公告)号：US07643607B2
公开(公告)日：2010-01-05
申请号：US11380488
申请日：2006-04-27
CPC分类号： G01T1/2985 , A61B6/032 , A61B6/4233 , G01N23/046 , G01N2223/419 , G01T1/1644 , G01T1/201 , G21K1/02
摘要： The present invention is a directed to a non-pixelated scintillator array for a CT detector as well as an apparatus and method of manufacturing same. The scintillator array is comprised of a number of ceramic fibers or single crystal fibers that are aligned in parallel with respect to one another. As a result, the pack has very high dose efficiency. Furthermore, each fiber is designed to direct light out to a photodiode with very low scattering loss. The fiber size (cross-sectional diameter) may be controlled such that smaller fibers may be fabricated for higher resolution applications. Moreover, because the fiber size can be controlled to be consistent throughout the scintillator array and the fibers are aligned in parallel with one another, the scintillator array, as a whole, also is uniform. Therefore, precise alignment with the photodiode array or the collimator assembly is not necessary.
摘要翻译： 本发明涉及一种用于CT检测器的非像素化闪烁体阵列以及其制造方法。 闪烁体阵列包括相对于彼此平行对准的多个陶瓷纤维或单晶纤维。 因此，该包装具有非常高的剂量效率。 此外，每个光纤被设计成将光引导到具有非常低的散射损耗的光电二极管。 可以控制纤维尺寸（横截面直径），使得可以制造更小的纤维用于更高分辨率的应用。 此外，由于可以将整个闪烁体阵列的纤维尺寸控制为一致，并且纤维彼此平行排列，所以闪烁体阵列整体上也是均匀的。 因此，不需要与光电二极管阵列或准直器组件的精确对准。
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3.发明授权System and method of aligning scintillator crystalline structures for computed tomography imaging 失效用于计算机断层摄影成像的闪烁体晶体结构对准的系统和方法公开(公告)号：US06704391B2
公开(公告)日：2004-03-09
申请号：US10063235
申请日：2002-04-02
申请人： David M. Hoffman , Haochuan Jiang
发明人： David M. Hoffman , Haochuan Jiang
IPC分类号： H05G164
CPC分类号： C30B30/04
摘要： The present invention discloses a method of aligning scintillator crystalline structures for computed tomography imaging and a system of use. Crystal seeds are deposited inside a glass melt and are then grown to form a plurality of layer crystallites. While growing the crystallites, a field is applied to align each crystallite structure in a uniform orientation. As a result, the crystallites are configured to reduce light scattering and improve the overall efficiency of the CT system. A CT system is disclosed implementing a scintillator array having a plurality of scintillators, each scintillator being formed of a plurality of uniformly aligned crystallites. Each crystallite includes a receiving surface and an exiting surface configured perpendicular to an x-ray beam. Further, the receiving surface and the exiting surface are connected by a plurality of surface walls arranged parallel to the x-ray beam.
摘要翻译： 本发明公开了一种用于计算层析成像的闪烁体晶体结构和使用系统的对准方法。 将晶体种子沉积在玻璃熔体内，然后生长以形成多个层微晶。 在生长微晶的同时，施加一个场以使均匀取向的每个微晶结构对准。 结果，微晶被配置为减少光散射并提高CT系统的整体效率。 公开了一种实现具有多个闪烁体的闪烁体阵列的CT系统，每个闪烁体由多个均匀排列的微晶形成。 每个微晶包括接收表面和垂直于x射线束配置的出射表面。 此外，接收表面和出射表面通过平行于x射线束布置的多个表面壁连接。
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4.发明授权System and method of aligning scintillator crystalline structures for computed tomography imaging 失效用于计算机断层摄影成像的闪烁体晶体结构对准的系统和方法公开(公告)号：US06480563B2
公开(公告)日：2002-11-12
申请号：US09681067
申请日：2000-12-19
申请人： David M. Hoffman , Haochuan Jiang
发明人： David M. Hoffman , Haochuan Jiang
IPC分类号： A61B600
CPC分类号： C30B30/04
摘要： The present invention discloses a method of aligning scintillator crystalline structures for computed tomography imaging and a system of use. Crystal seeds are deposited inside a glass melt and are then grown to form a plurality of layer crystallites. While growing the crystallites, a field is applied to align each crystallite structure in a uniform orientation. As a result, the crystallites are configured to reduce light scattering and improve the overall efficiency of the CT system. A CT system is disclosed implementing a scintillator array having a plurality of scintillators, each scintillator being formed of a plurality of uniformly aligned crystallites. Each crystallite includes a receiving surface and an exiting surface configured perpendicular to an x-ray beam. Further, the receiving surface and the exiting surface are connected by a plurality of surface walls arranged parallel to the x-ray beam.
摘要翻译： 本发明公开了一种用于计算层析成像的闪烁体晶体结构和使用系统的对准方法。 将晶体种子沉积在玻璃熔体内，然后生长以形成多个层微晶。 在生长微晶的同时，施加一个场以使均匀取向的每个微晶结构对准。 结果，微晶被配置为减少光散射并提高CT系统的整体效率。 公开了一种实现具有多个闪烁体的闪烁体阵列的CT系统，每个闪烁体由多个均匀排列的微晶形成。 每个微晶包括接收表面和垂直于x射线束配置的出射表面。 此外，接收表面和出射表面通过平行于x射线束布置的多个表面壁连接。
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5.发明授权Apparatus and method of converting electromagnetic energy directly to electrons for computed tomography imaging 失效将电磁能量直接转换为电子用于计算机断层成像的装置和方法公开(公告)号：US06480562B2
公开(公告)日：2002-11-12
申请号：US09681047
申请日：2000-12-05
申请人： Haochuan Jiang , David M. Hoffman
发明人： Haochuan Jiang , David M. Hoffman
IPC分类号： A61B600
CPC分类号： A61B6/5205 , A61B6/032 , G01V5/005
摘要： The present invention provides a detector for a multi-slice CT system. The detector includes a scintillator for receiving and converting high frequency electromagnetic energy directly to electrons. The detector is further configured to directly conduct the electrons. The detector comprises a compound formed of scintillator bulk and a conducting material capable of converting high frequency energy to electrons as well as conduct electrons. The CT system also provides for a gantry having an output for projecting high frequency electromagnetic energy toward the detector and a data acquisition system for receiving electrons directly from the detector. A method to provide imaging electrons to a CT system is also provided.
摘要翻译： 本发明提供了一种用于多层CT系统的检测器。 检测器包括用于接收并将高频电磁能量直接转换成电子的闪烁器。 检测器还被配置为直接导电。 检测器包括由闪烁器本体形成的化合物和能够将高频能转换成电子以及导电的导电材料。 CT系统还提供具有用于向检测器投射高频电磁能的输出的台架，以及用于从检测器直接接收电子的数据采集系统。 还提供了向CT系统提供成像电子的方法。
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公开(公告)号：US07308074B2
公开(公告)日：2007-12-11
申请号：US10707405
申请日：2003-12-11
申请人： Haochuan Jiang , David M. Hoffman
发明人： Haochuan Jiang , David M. Hoffman
IPC分类号： G01T1/24
CPC分类号： G01T1/2002 , A61B6/032 , A61B6/4085 , A61B6/4411
摘要： A multi-layer reflector for a CT detector is disclosed. The reflector includes an x-ray absorption component that is sandwiched between a pair of highly reflective components. Such a reflector is formed between adjacent scintillators of a CT detector so as to reduce cross-talk between adjacent scintillators as well as maintain a relatively high light output for signal detection. Moreover, the multi-layer reflectors may be disposed one-dimensionally or two-dimensionally across a scintillator array. A method of manufacturing such a reflector and incorporating same into a CT detector is also disclosed.
摘要翻译： 公开了一种用于CT检测器的多层反射器。 反射器包括夹在一对高反射部件之间的x射线吸收部件。 这样的反射器形成在CT检测器的相邻的闪烁体之间，以减少相邻的闪烁体之间的串扰，并且保持用于信号检测的较高的光输出。 此外，多层反射器可以一次性地或二维地布置在闪烁体阵列上。 还公开了制造这种反射器并将其结合到CT检测器中的方法。
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公开(公告)号：US07224766B2
公开(公告)日：2007-05-29
申请号：US11029612
申请日：2005-01-04
CPC分类号： G01T1/2985 , A61B6/032 , A61B6/4233 , G01N23/046 , G01N2223/419 , G01T1/1644 , G01T1/201 , G21K1/02
摘要： The present invention is a directed to a non-pixelated scintillator array for a CT detector as well as an apparatus and method of manufacturing same. The scintillator array is comprised of a number of ceramic fibers or single crystal fibers that are aligned in parallel with respect to one another. As a result, the pack has very high dose efficiency. Furthermore, each fiber is designed to direct light out to a photodiode with very low scattering loss. The fiber size (cross-sectional diameter) may be controlled such that smaller fibers may be fabricated for higher resolution applications. Moreover, because the fiber size can be controlled to be consistent throughout the scintillator array and the fibers are aligned in parallel with one another, the scintillator array, as a whole, also is uniform. Therefore, precise alignment with the photodiode array or the collimator assembly is not necessary.
摘要翻译： 本发明涉及一种用于CT检测器的非像素化闪烁体阵列以及其制造方法。 闪烁体阵列包括相对于彼此平行对准的多个陶瓷纤维或单晶纤维。 因此，该包装具有非常高的剂量效率。 此外，每个光纤被设计成将光引导到具有非常低的散射损耗的光电二极管。 可以控制纤维尺寸（横截面直径），使得可以制造更小的纤维用于更高分辨率的应用。 此外，由于可以将整个闪烁体阵列的纤维尺寸控制为一致，并且纤维彼此平行排列，所以闪烁体阵列整体上也是均匀的。 因此，不需要与光电二极管阵列或准直器组件的精确对准。
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8.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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10.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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