公开(公告)号：US07088799B2

公开(公告)日：2006-08-08

申请号：US11160830

申请日：2005-07-12

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 ,  G21K1/02

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：US07084404B2

公开(公告)日：2006-08-01

申请号：US11163973

申请日：2005-11-04

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

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

IPC分类号： G01T1/20

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.

公开(公告)号：US07064334B2

公开(公告)日：2006-06-20

申请号：US10908209

申请日：2005-05-02

申请人： David M. Hoffman ,  Michael F Hoge

发明人： David M. Hoffman ,  Michael F Hoge

IPC分类号： G01T1/20

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：US07054408B2

公开(公告)日：2006-05-30

申请号：US10249694

申请日：2003-04-30

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 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。

公开(公告)号：US06990171B2

公开(公告)日：2006-01-24

申请号：US10765617

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： G21K1/12

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, performing at least one scout scan, and marking a user-defined region-of-interest. An attenuation characteristic of an attenuation filter is then automatically adjusted based on the user-defined region-of-interest. 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： 提供了一种诊断成像的系统和方法，其包括将成像装置中的被摄体定位，执行至少一个侦察扫描，以及标记用户定义的感兴趣区域。 衰减滤波器的衰减特性然后根据用户定义的感兴趣区域自动调整。 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。

公开(公告)号：US06953935B1

公开(公告)日：2005-10-11

申请号：US10842978

申请日：2004-05-11

申请人： David M. Hoffman

发明人： David M. Hoffman

IPC分类号： A61B6/03 ,  G01J1/24 ,  G01T1/24 ,  G01T1/29 ,  G21K4/00 ,  H01L31/0296 ,  H01L31/115 ,  H01L31/18

CPC分类号： G01T1/242 ,  G01T1/249

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.

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。

公开(公告)号：US06927379B2

公开(公告)日：2005-08-09

申请号：US09747549

申请日：2000-12-22

申请人： David M. Hoffman

发明人： David M. Hoffman

IPC分类号： G01T1/20 ,  G01T7/00 ,  H01L27/14 ,  H01L31/02 ,  H04N5/225 ,  H04N5/32 ,  H01L27/00

CPC分类号： H04N5/2253 ,  G01T1/2018 ,  H04N5/32

摘要： A technique is provided for improving the efficiency of an imaging system. Generally, a digital detector has an array of rows and columns of pixels, read out electronics and scan electronics that are configured to generate and transmit signals based upon radiation impacting the detector. The detector is placed within a housing, which is then transferred to the location of use. The present technique provides a mechanism for protecting the housing and the detector from corruptive elements such as moisture. Particularly, the present technique involves the sealing of the detector after manufacture and sealing of the housing after assembly.

摘要翻译： 提供了一种提高成像系统效率的技术。 通常，数字检测器具有行和列的像素阵列，读出电子元件和扫描电子元件，其配置为基于影响检测器的辐射产生和传输信号。 检测器放置在外壳内，然后将其转移到使用位置。 本技术提供了一种用于保护壳体和检测器免受腐蚀性元件（例如湿气）的机构。 特别地，本技术涉及在组装后壳体的制造和密封之后密封检测器。

公开(公告)号：US06717150B2

公开(公告)日：2004-04-06

申请号：US09735131

申请日：2000-12-12

申请人： David M. Hoffman

发明人： David M. Hoffman

IPC分类号： G01T120

CPC分类号： G01T1/2985 ,  G01T1/2018

摘要： A finished detector module suitable for use in a computed tomography (CT) imaging system is provided. The finished detector module includes a substrate; a photosensor array mounted on the substrate; an array of scintillators optically coupled to the photosensor array and separated therefrom by a gap filled with either air or a compliant clear film, and a flexible electrical cable electrically coupled to the photosensor array.

摘要翻译： 提供了一种适用于计算机断层摄影（CT）成像系统的成品检测器模块。 完成的检测器模块包括基板; 安装在基板上的光电传感器阵列; 光学耦合到光电传感器阵列并通过填充有空气或柔顺透明膜的间隙与其分离的闪烁体阵列，以及电耦合到光电传感器阵列的柔性电缆。

公开(公告)号：US06522715B2

公开(公告)日：2003-02-18

申请号：US10125951

申请日：2002-04-19

申请人： David M. Hoffman ,  Bing Shen

发明人： David M. Hoffman ,  Bing Shen

IPC分类号： G01N2300

CPC分类号： G01T1/2985 ,  A61B6/032 ,  H01R12/62

摘要： A detector module includes a photosensor array having a first width, and a flexible cable operationally coupled to the photosensor array, wherein the cable has a width greater then the first width.

公开(公告)号：US06473486B2

公开(公告)日：2002-10-29

申请号：US09681048

申请日：2000-12-05

申请人： David M. Hoffman

发明人： David M. Hoffman

IPC分类号： G01T120

CPC分类号： A61B6/5205 ,  A61B6/032

摘要： The present invention provides a detector for a CT imaging system. The detector includes a focused scintillator for receiving and converting high frequency electromagnetic energy to light energy. The detector further includes a photodiode positioned adjacent to the scintillator and configured to receive light energy discharged through a light exiting surface of the scintillator. The detector also includes electrical leads to transmit signals from the photodiode to a data processing unit for image construction. The CT system also provides for a gantry having an output for projecting high frequency electromagnetic energy toward the scintillator. A method of use and method of fabricating the tapered scintillators of the tapered scintillator array are also disclosed.

摘要翻译： 本发明提供了一种用于CT成像系统的检测器。 检测器包括聚焦闪烁器，用于接收和将高频电磁能转换成光能。 检测器还包括位于闪烁体附近的光电二极管，并被配置为接收通过闪烁体的光出射表面放出的光能。 检测器还包括电导线，用于将信号从光电二极管传输到用于图像构建的数据处理单元。 CT系统还提供具有用于向闪烁体投射高频电磁能的输出的机架。 还公开了一种使用锥形闪烁体阵列的锥形闪烁体的制造方法和制造方法。