公开(公告)号：US4414473A

公开(公告)日：1983-11-08

申请号：US236804

申请日：1981-02-23

申请人： David M. Hoffman ,  Dennis Pritzkow ,  George R. Lang

发明人： David M. Hoffman ,  Dennis Pritzkow ,  George R. Lang

IPC分类号： G01T1/20 ,  H01J47/02

CPC分类号： H01J47/02

摘要： A resilient locking and sealing arrangement for a multi-channel reflective cavity scintillation detector useful in a CT scanner. The absorption coefficient of the detector window is minimized in order to enhance detector efficiency, by forming such window of layers of woven graphite fiber bonded together with epoxy. The detector window includes resilient sealing means positioned to engage the leading edge of unit cell elements assembled to form a detector array. Resilient lock means force the plate into a reference position and into contact with the resilient sealing means thereby to accurately locate the plate in the array, and also to provide an effective light seal.

摘要翻译： 用于CT扫描器的多通道反射腔闪烁检测器的弹性锁定和密封装置。 通过将环氧树脂粘合在一起的编织石墨纤维层的这种窗口，使检测器窗口的吸收系数最小化，以提高检测器效率。 检测器窗口包括弹性密封装置，其定位成接合组装成形成检测器阵列的单元电池元件的前缘。 弹性锁定装置迫使板进入参考位置并与弹性密封装置接触，从而将板精确定位在阵列中，并提供有效的光密封。

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。

公开(公告)号：US07167539B1

公开(公告)日：2007-01-23

申请号：US10604589

申请日：2003-08-01

申请人： David M. Hoffman

发明人： David M. Hoffman

IPC分类号： A61B6/00

CPC分类号： G01V5/005 ,  G01T1/2985

摘要： The present invention provides a method of manufacturing a CT detector cell having an x-ray absorption component and a thermal sensing component. The thermal sensing component is configured to detect thermal differentials in the absorption component resulting from the absorption of x-rays.

摘要翻译： 本发明提供一种制造具有x射线吸收分量和热感测组件的CT检测器单元的方法。 热感测部件被配置为检测由吸收X射线引起的吸收部件中的热差。

公开(公告)号：US07129498B2

公开(公告)日：2006-10-31

申请号：US10668581

申请日：2003-09-23

申请人： David M. Hoffman

发明人： David M. Hoffman

IPC分类号： G01N23/083 ,  G01T1/20 ,  G01T1/24 ,  H01L25/065 ,  H01L27/146

CPC分类号： G01T1/2928 ,  G01T1/166

摘要： This invention relates generally to a system for differentiating material characteristics using a Computed Tomography imaging system. More particularly, it relates to a detector module for use with a hybrid-scintillator/photo sensor and direct conversion imaging system comprised of an x-ray transparent top layer; an electrode on said top; a block of direct conversion material, the electrode providing a common bias to the direct conversion material; a substrate material electrically connected with the direct conversion material; a signal processing chip electrically connected with the substrate; and a connector element electrically connected to the substrate.

摘要翻译： 本发明一般涉及使用计算机断层扫描成像系统来区分材料特性的系统。 更具体地说，本发明涉及一种与混合闪烁体/光电传感器一起使用的检测器模块和由x射线透明顶层组成的直接转换成像系统; 所述顶部上的电极; 直接转换材料块，电极为直接转换材料提供共同的偏置; 与所述直接转换材料电连接的基板材料; 与所述基板电连接的信号处理芯片; 以及电连接到所述基板的连接器元件。

公开(公告)号：US07046763B2

公开(公告)日：2006-05-16

申请号：US10707604

申请日：2003-12-23

申请人： David M. Hoffman

发明人： David M. Hoffman

IPC分类号： H05G1/64

CPC分类号： A61B6/032 ,  A61B6/58 ,  A61B6/581 ,  A61B6/583

摘要： An imaging assembly is provided including an x-ray source and a controller in communication with the x-ray source. A detector assembly is in communication with the controller, and includes a photodetector array in communication with the controller. A scintillator assembly is positioned between the photodetector array and the x-ray source. A collimator assembly is positioned in between the scintillator assembly and the x-ray source. An electroluminescent panel is positioned between the collimator assembly and the scintillator assembly. The electroluminescent panel is in communication with the controller and has an active condition where the electroluminescent panel generates radiation eliciting a response from the detector array.

摘要翻译： 提供了一种成像组件，包括x射线源和与x射线源连通的控制器。 检测器组件与控制器通信，并且包括与控制器通信的光电检测器阵列。 闪烁体组件位于光电检测器阵列和x射线源之间。 准直器组件位于闪烁体组件和x射线源之间。 电致发光面板位于准直器组件和闪烁体组件之间。 电致发光面板与控制器连通并且具有激活状态，其中电致发光面板产生引起来自检测器阵列的响应的辐射。

公开(公告)号：US07046756B2

公开(公告)日：2006-05-16

申请号：US10249933

申请日：2003-05-20

申请人： David M. Hoffman

发明人： David M. Hoffman

IPC分类号： G21K3/00

CPC分类号： A61B6/032 ,  A61B6/4035 ,  G21K1/10

摘要： The present invention is directed to a method and apparatus for CT data acquisition using a rotatable pre-subject filter having more than one filtering profile to control radiation exposure to a subject. The filter has one profile used to filter radiation when the radiation source is positioned above a subject and another profile that is used to filter radiation when the radiation source is positioned at a side of the subject.

摘要翻译： 本发明涉及一种用于使用具有多于一个滤波轮廓的可旋转的预受检过滤器来控制对受试者的辐射照射的CT数据采集的方法和装置。 当辐射源位于受试者上方时，该过滤器具有用于过滤辐射的一个轮廓，当辐射源位于受试者侧面时，该轮廓用于过滤辐射。

公开(公告)号：US06968030B2

公开(公告)日：2005-11-22

申请号：US10249931

申请日：2003-05-20

申请人： David M. Hoffman

发明人： David M. Hoffman

IPC分类号： A61B6/03 ,  G21K1/02 ,  G21K3/00

CPC分类号： A61B6/032 ,  A61B6/4035 ,  G21K1/02

摘要： The present invention is directed to a method and apparatus for CT data acquisition using a rotatable pre-subject filter having more than one filtering profile to control radiation exposure to a subject. The filter is caused to rotate by a motor and bearing assembly and has one profile used to filter radiation when the radiation source is positioned above a subject and another profile that is used to filter radiation when the radiation source is positioned at a side of the subject.

摘要翻译： 本发明涉及一种用于使用具有多于一个滤波轮廓的可旋转的预受检过滤器来控制对受试者的辐射照射的CT数据采集的方法和装置。 通过电动机和轴承组件使过滤器旋转，并且当辐射源位于被摄体上方时具有用于过滤辐射的一个轮廓，并且当辐射源位于被摄体的一侧时用于过滤辐射的另一轮廓 。

公开(公告)号：US06933504B2

公开(公告)日：2005-08-23

申请号：US10249052

申请日：2003-03-12

申请人： David M. Hoffman ,  Michael F. Hoge

发明人： David M. Hoffman ,  Michael F. Hoge

IPC分类号： A61B6/03 ,  G01T1/20 ,  H01L31/09 ,  G01T1/24

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.

摘要翻译： 本发明涉及一种用于CT成像系统的CT检测器，其中包括光电二极管阵列和闪烁体阵列之间的分段光耦合器。 分段光耦合器还用作光准直器，其提高了光电二极管阵列的光收集效率。 分段光耦合器由共同形成多个开放单元的一系列反射器元件限定。 开放的电池形成光透射腔，并促进从闪烁体到光电二极管的准直。 空腔可以填充有光学环氧树脂以密封到光电二极管阵列。

公开(公告)号：US06907101B2

公开(公告)日：2005-06-14

申请号：US10248929

申请日：2003-03-03

申请人： David M. Hoffman

发明人： David M. Hoffman

IPC分类号： G01T1/20 ,  A61B6/03 ,  A61B6/08 ,  G01N23/00 ,  G01T1/29 ,  G21K1/12 ,  H04N5/32 ,  H05G1/64

CPC分类号： G01T1/2002 ,  G01T1/2985

摘要： The present invention is directed to an improved CT detector scintillator to photodiode optical coupling. The CT detector utilizes a controlled air gap between the photodiode array and the scintillator array together with an anti-reflective layer on the scintillator array. To improve the absorption of light at the photodiode array, the photodiode array includes a textured light reception surface. By incorporating a textured layer with the photodiode array, the light collection efficiency of the photodiodes is improved. The textured layer may extend along an x- and/or z-axis and the texturing may be in different forms. For example, the textured layer may include a series of pyramidally-shaped protrusions.

摘要翻译： 本发明涉及一种改进的CT检测器闪烁体到光电二极管光耦合。 CT检测器利用光电二极管阵列和闪烁体阵列之间的受控空气间隙以及闪烁体阵列上的抗反射层。 为了改善在光电二极管阵列处的光的吸收，光电二极管阵列包括纹理的光接收表面。 通过结合具有光电二极管阵列的纹理层，光电二极管的光收集效率提高。 纹理化层可以沿x轴和/或z轴延伸，并且纹理化可以是不同的形式。 例如，纹理化层可以包括一系列棱锥形突起。

公开(公告)号：US06859514B2

公开(公告)日：2005-02-22

申请号：US10249092

申请日：2003-03-14

申请人： David M. Hoffman

发明人： David M. Hoffman

IPC分类号： A61B6/03 ,  G01T1/20 ,  A61B6/00 ,  G01T1/24

CPC分类号： G01T1/2018 ,  A61B6/032 ,  A61B6/4411

摘要： The present invention is directed to a CT detector array having uniform cross-talk. Discontinuities in cross-talk between adjacent CT detectors of a CT detector array are minimized by increasing the cross-talk at the boundaries of adjacent CT detectors. Discontinuities throughout a CT detector contribute to artifact presence in a final reconstructed image, therefore, it is preferred that cross-talk throughout the CT detector array be relatively uniform. Reducing the width of reflector material between adjacent CT detectors increases the cross-talk between the CT detectors. This increase in cross-talk offsets the reduced cross-talk that typically occurs between scintillators, optical epoxy layers, and photodiodes at the CT detector interface. Cross-talk may also be increased by reducing the amount of chrome deposited in the reflector between CT detectors or reducing the levels of titanium oxide typically used in reflector layers.

摘要翻译： 本发明涉及具有均匀串扰的CT检测器阵列。 CT检测器阵列的相邻CT检测器之间的串扰不连续性通过增加相邻CT检测器边界处的串扰来最小化。 CT检测器中的不连续性有助于最终重构图像中的伪像存在，因此，优选的是，整个CT检测器阵列中的串扰相对均匀。 减少相邻CT检测器之间的反射器材料的宽度增加了CT检测器之间的串扰。 串扰的这种增加抵消了在CT检测器接口处的闪烁体，光学环氧树脂层和光电二极管之间通常发生的减少的串扰。 串扰也可以通过减少沉积在CT检测器之间的反射器中的铬的量来减少通常用于反射器层中的氧化钛的水平而增加。