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    CT imaging system with multiple peak x-ray source
    1.
    发明授权
    CT imaging system with multiple peak x-ray source 有权
    CT成像系统具有多峰X射线源

    公开(公告)号：US07778382B2

    公开(公告)日：2010-08-17

    申请号：US11465472

    申请日：2006-08-18

    申请人： David M. Hoffman

    发明人： David M. Hoffman

    IPC分类号： H05G1/02 ,  H01J35/06 ,  G21K3/00

    CPC分类号： A61B6/032 ,  A61B6/027 ,  A61B6/4007 ,  A61B6/4021 ,  A61B6/4035 ,  A61B6/4241 ,  A61B6/482 ,  H01J35/06 ,  H01J2235/068

    摘要： An x-ray source (32) for performing energy discrimination within an imaging system (10) includes a cathode-emitting device (82) for emitting electrons and an anode (81) that has a target (80) whereupon the electrons impinge to generate an x-ray beam (93) with multiple x-ray quantity energy peaks (116 and 120). A method of performing energy discrimination in the imaging system (10) includes emitting the electrons. The x-ray beam (93) with the x-ray quantity energy peaks (116 and 120) is generated. The x-ray beam (93) is directed through an object (44) and is thereafter received. An x-ray image having multiple energy differentiable characteristics is generated in response to the x-ray beam (93) as received.

    摘要翻译： 用于在成像系统（10）内执行能量鉴别的x射线源（32）包括用于发射电子的阴极发射器件（82）和具有靶（80）的阳极（81），因此电子撞击以产生 具有多个X射线量能量峰值（116和120）的x射线束（93）。 在成像系统（10）中执行能量鉴别的方法包括发射电子。 产生具有x射线量能量峰值（116和120）的x射线束（93）。 x射线束（93）被引导通过物体（44），然后被接收。 响应于所接收的x射线束（93）产生具有多个能量可微特性的X射线图像。

    Pre-subject filters for CT detectors and methods of making same
    2.
    发明授权
    Pre-subject filters for CT detectors and methods of making same 有权
    CT检测器的前置滤波器及其制作方法

    公开(公告)号：US07769127B2

    公开(公告)日：2010-08-03

    申请号：US11533611

    申请日：2006-09-20

    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。

    FLAT PANEL DETECTOR BASED SLOT SCANNING CONFIGURATION
    4.
    发明申请
    FLAT PANEL DETECTOR BASED SLOT SCANNING CONFIGURATION 审中-公开
    基于平板检测器的槽扫描配置

    公开(公告)号：US20080170661A1

    公开(公告)日：2008-07-17

    申请号：US11839783

    申请日：2007-08-16

    申请人： Christopher D. Unger ,  David M. Hoffman ,  Vivek Bhatt

    发明人： Christopher D. Unger ,  David M. Hoffman ,  Vivek Bhatt

    IPC分类号： G01N23/04

    CPC分类号： G01T1/2018 ,  A61B6/027 ,  A61B6/06 ,  A61B6/4233 ,  A61B6/4291 ,  A61B6/588 ,  G01N23/04 ,  G01N23/20

    摘要： The present invention relates to a diagnostic X-ray device, system or apparatus for performing diagnostic radiology and a method of configuring such a diagnostic X-ray device, system or apparatus. More specifically, the present invention relates to a diagnostic system for forming at least one image of an object having enhanced contrast. The system comprises a beam source adapted to produce an imaging beam and a masking member adapted to form at least one beam portion from the imaging beam and adapted to image the object. The system further comprises a flat panel detector positioned in a path of at least one beam portion penetrating the object and adapted to form at least one image of the object.

    摘要翻译： 本发明涉及用于执行诊断放射学的诊断X射线装置，系统或装置以及配置这种诊断X射线装置，系统或装置的方法。 更具体地，本发明涉及用于形成具有增强的对比度的物体的至少一个图像的诊断系统。 该系统包括适于产生成像光束的光束源和适于从成像光束形成至少一个光束部分并适于对物体成像的掩蔽部件。 该系统还包括平板检测器，该平板检测器定位在至少一个光束部分穿过物体的路径中，并适于形成物体的至少一个图像。

    Thermal sensing detector cell for a computed tomography system and method of manufacturing same
    7.
    发明授权
    Thermal sensing detector cell for a computed tomography system and method of manufacturing same 有权
    用于计算机断层摄影系统的热感测检测器及其制造方法

    公开(公告)号：US06654443B1

    公开(公告)日：2003-11-25

    申请号：US09683869

    申请日：2002-02-25

    申请人： David M. Hoffman

    发明人： David M. Hoffman

    IPC分类号： G06K900

    CPC分类号： G01V5/005 ,  G01T1/2985

    摘要： The present invention provides a detector cell having an x-ray absorption component and a thermal sensing component configured to detect thermal differentials in the absorption component resulting from the absorption of x-rays. The absorption component comprises high density materials that respond thermally to the reception of x-rays or other HF electromagnetic energy. The thermal sensing component detects the changes in temperature of the absorption component and outputs electrical signals indicative of the number and intensity of the x-rays absorbed. An image reconstructor then processes those electrical signals to reconstruct an image of the subject scanned. A method of manufacturing the detector cell is also provided.

    摘要翻译： 本发明提供了一种具有x射线吸收分量和热感测组件的检测器单元，其被配置为检测由吸收X射线引起的吸收组分中的热差。 吸收组分包括对接收X射线或其他HF电磁能的热响应的高密度材料。 热感测部件检测吸收部件的温度变化，并输出表示吸收的X射线的数量和强度的电信号。 然后，图像重建器处理那些电信号以重建被扫描的被摄体的图像。 还提供了一种制造检测器单元的方法。

    Methods and apparatus for providing additional computed tomography imaging modes
    8.
    发明授权
    Methods and apparatus for providing additional computed tomography imaging modes 失效
    用于提供额外的计算机断层摄影成像模式的方法和装置

    公开(公告)号：US06389096B1

    公开(公告)日：2002-05-14

    申请号：US09721330

    申请日：2000-11-22

    申请人： David M. Hoffman ,  Robert F. Senzig ,  Stanley H. Fox

    发明人： David M. Hoffman ,  Robert F. Senzig ,  Stanley H. Fox

    IPC分类号： A61B603

    CPC分类号： A61B6/032

    摘要： In one aspect, the invention is a method for changing at least one of a number of image slices and in-plane resolutions available in an existing imaging system. The method includes steps of: replacing the existing detector array with a replacement detector array having either narrower detector cells in the x-direction than an existing detector array, a greater number of detector cells than that of the existing detector array, or both; and selecting an in-plane resolution of the replacement detector array in accordance with a maximum bandwidth limit of a communication path in the imaging system.

    摘要翻译： 一方面，本发明是用于改变现有成像系统中可用的多个图像切片和平面内分辨率中的至少一个的方法。 该方法包括以下步骤：用具有比现有检测器阵列更窄的检测器单元在x方向上的替换检测器阵列替换现有检测器阵列，比现有检测器阵列或两者更大数量的检测器单元; 以及根据所述成像系统中的通信路径的最大带宽限制来选择所述替换检测器阵列的平面内分辨率。

    Multi-layered scintillators for computed tomograph systems
    9.
    发明授权
    Multi-layered scintillators for computed tomograph systems 失效
    用于计算机断层摄影系统的多层闪烁体

    公开(公告)号：US6087665A

    公开(公告)日：2000-07-11

    申请号：US980193

    申请日：1997-11-26

    申请人： David M. Hoffman ,  Hui David He

    发明人： David M. Hoffman ,  Hui David He

    IPC分类号： A61B6/03 ,  G01N23/04 ,  G01T1/20 ,  G01T1/29

    CPC分类号： G01T1/2985 ,  A61B6/032 ,  G01N23/046 ,  G01T1/2008 ,  G01T1/2018 ,  G01N2223/419

    摘要： A multi-layer scintillator having a first and a second layer of scintillation material. In one embodiment, the scintillator first layer has fast scintillation characteristics and the second layer has a higher transparency than the first layer. The two scintillating layers are bonded together so that a light signal is transferred from the first layer to the second layer and the second layer to a photodiode adjacent the second layer. The specific scintillating materials are selected to achieve the desired characteristics of the scintillator.

    摘要翻译： 具有第一层和第二层闪烁材料的多层闪烁体。 在一个实施例中，闪烁体第一层具有快速闪烁特性，并且第二层具有比第一层更高的透明度。 两个闪烁层结合在一起，使得光信号从第一层转移到第二层，第二层被转移到与第二层相邻的光电二极管。 选择特定的闪烁材料以实现闪烁体的期望特性。

    CT detector array having non-pixelated scintillator array
    10.
    发明授权
    CT detector array having non-pixelated scintillator array 有权
    具有非象素化闪烁体阵列的CT检测器阵列

    公开(公告)号：US07643607B2

    公开(公告)日：2010-01-05

    申请号：US11380488

    申请日：2006-04-27

    申请人： Haochuan Jiang ,  David M. Hoffman ,  James S. Vartuli

    发明人： Haochuan Jiang ,  David M. Hoffman ,  James S. Vartuli

    IPC分类号： H05G1/64 ,  G01T1/202

    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。