公开(公告)号：US20070025501A1

公开(公告)日：2007-02-01

申请号：US11533611

申请日：2006-09-20

申请人： David Hoffman

发明人： David Hoffman

IPC分类号： H05G1/60 ,  G21K1/02 ,  A61B6/00 ,  G01N23/00 ,  G21K1/12

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。

公开(公告)号：US20060285645A1

公开(公告)日：2006-12-21

申请号：US11465472

申请日：2006-08-18

申请人： David Hoffman

发明人： David Hoffman

IPC分类号： H05G2/00 ,  G21G4/00 ,  H01J35/00 ,  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) 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 received. An x-ray image having multiple energy differentiable characteristics is generated in response to the x-ray beam (93).

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 x射线束（93）具有多个x射线量能量峰（116和120）。 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）并被接收。 响应于X射线束（93）产生具有多个能量可微特性的X射线图像。

公开(公告)号：US20060104415A1

公开(公告)日：2006-05-18

申请号：US10990267

申请日：2004-11-16

申请人： Christopher Unger ,  David Hoffman ,  Vivek Bhatt

发明人： Christopher Unger ,  David 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.

公开(公告)号：US20060056576A1

公开(公告)日：2006-03-16

申请号：US10711329

申请日：2004-09-10

申请人： David Hoffman ,  Jerome Arenson

发明人： David Hoffman ,  Jerome Arenson

IPC分类号： H05G1/60 ,  A61B6/00

CPC分类号： G01T1/17 ,  A61B6/4241 ,  G01T1/1647 ,  G01T1/2985

摘要： A method and system of counting and tagging radiation energy received by a radiation detector is presented. The method and system are designed to dynamically control the sampling window or shaping time characteristics of a photon counting detector to accommodate variations of flux experienced by the detector so as to preserve optimum detector performance and prevent saturation during high flux conditions.

摘要翻译： 提出了一种对辐射检测器接收的辐射能进行计数和标记的方法和系统。 该方法和系统被设计为动态地控制光子计数检测器的采样窗口或成形时间特性，以适应检测器所经受的通量的变化，从而保持最佳检测器性能并防止高通量条件下的饱和。

公开(公告)号：US20060027759A1

公开(公告)日：2006-02-09

申请号：US10710863

申请日：2004-08-09

申请人： Haochuan Jiang ,  David Hoffman

发明人： Haochuan Jiang ,  David Hoffman

IPC分类号： G01T1/24

CPC分类号： G01T1/2002 ,  G01T1/2018

摘要： A scintillator array for use in a CT imaging system and a method for making the scintillator array are provided. The scintillator array includes a plurality of projecting elements disposed proximate one another. The scintillator array further includes a glass compound containing a plurality of reflective particles being disposed on the plurality of projecting elements, wherein the projecting elements emit light in response to receiving x-rays.

摘要翻译： 提供了用于CT成像系统的闪烁体阵列和制造闪烁体阵列的方法。 闪烁体阵列包括彼此靠近设置的多个突出元件。 闪烁体阵列还包括含有多个反射粒子的玻璃化合物，多个反射粒子设置在多个突出元件上，其中突出元件响应于接收到的X射线而发光。

公开(公告)号：US20060020306A1

公开(公告)日：2006-01-26

申请号：US11185525

申请日：2005-07-20

申请人： Timothy Davis ,  Leroy Perz ,  Nathan Torgerson ,  Carl Wahlstrand ,  David Hoffman

发明人： Timothy Davis ,  Leroy Perz ,  Nathan Torgerson ,  Carl Wahlstrand ,  David Hoffman

IPC分类号： A61N1/18

CPC分类号： A61N1/37252 ,  A61N1/3787

摘要： A system, method and implantable medical for concurrently providing a therapeutic output to a patient while communicating transcutaneously with an external device. The therapeutic output is provided to the patient with an implantable medical device wherein an electromagnetic signal is associated with at least one of recharging of a rechargeable power source and providing the therapeutic output. Bi-directional transcutaneous communication is conducted via via telemetry between the implantable medical device and an external device using a telemetry signal while the telemetry signal and the electromagnetic signal occur simultaneously.

公开(公告)号：US20050192773A1

公开(公告)日：2005-09-01

申请号：US10791099

申请日：2004-03-01

申请人： Eric Sheng ,  David Hoffman ,  John Niven

发明人： Eric Sheng ,  David Hoffman ,  John Niven

IPC分类号： G01K7/42 ,  G01R31/28 ,  G01K1/08

CPC分类号： G01R31/2874 ,  G01K7/42 ,  G01R31/2879

摘要： Systems and methods for reducing temperature variation during burn-in testing. In one embodiment, power consumed by an integrated circuit under test is measured. An ambient temperature associated with the integrated circuit is measured. A desired junction temperature of the integrated circuit is achieved by adjusting a body bias voltage of the integrated circuit. By controlling temperature of individual integrated circuits, temperature variation during burn-in testing can be reduced.

摘要翻译： 老化测试中降低温度变化的系统和方法。 在一个实施例中，测量被测集成电路消耗的功率。 测量与集成电路相关的环境温度。 通过调整集成电路的体偏置电压来实现集成电路的期望结温。 通过控制各个集成电路的温度，可以降低老化试验期间的温度变化。

公开(公告)号：US20050089135A1

公开(公告)日：2005-04-28

申请号：US10765582

申请日：2004-01-27

申请人： Thomas Toth ,  David Hoffman

发明人： Thomas Toth ,  David Hoffman

IPC分类号： A61B6/03 ,  H05G1/60 ,  A61B6/00 ,  G01N23/00 ,  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 determining a position of a subject in a scanning bay and tailoring x-ray attenuation such that the specific position of the subject is taken into consideration. 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，其包括确定扫描间隔中的对象的位置并调整x射线衰减，使得考虑对象的特定位置。 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：US20050061984A1

公开(公告)日：2005-03-24

申请号：US10668587

申请日：2003-09-23

申请人： David Hoffman

发明人： David Hoffman

IPC分类号： G01T1/164 ,  G01T1/20

CPC分类号： G01T1/2018 ,  G01T1/1644

摘要： The present invention provides a CT detector module with cell summing in the Z-direction and cell staggering in the X-direction. The present invention also provides a method for implementing the present invention by simply combining the cells in the Z-direction. The staggering of the cells in the Z-axis improves the signal sampling in the Z-direction without changing either the X-axis or Y-axis resolution. In effect, this provides spatial resolution in the Z-direction.

摘要翻译： 本发明提供了一种CT检测器模块，其具有在Z方向上的单元相加和在X方向上的单元交错。 本发明还提供了通过简单地组合Z方向上的单元来实现本发明的方法。 Z轴上的单元格的交错改善了Z方向上的信号采样，而不改变X轴或Y轴分辨率。 实际上，这提供了Z方向上的空间分辨率。

公开(公告)号：US3938184A

公开(公告)日：1976-02-10

申请号：US560855

申请日：1975-03-21

申请人： Richard E. DeFrancesco ,  Bernard Harris ,  David Hoffman

发明人： Richard E. DeFrancesco ,  Bernard Harris ,  David Hoffman

IPC分类号： H03K5/1534 ,  G11B5/09

CPC分类号： H03K5/1534

摘要： A digital flutter reduction system which corrects for a varying time base ror in FM recordings on magnetic tape. Pulse transitions from the outputs of a reference oscillator and a reference tone on a first tape track are compared by a flip-flop whose output is a pulse having a width corresponding to the time base error. The output pulse enables a first counter to provide a digital output which is loaded into a second counter. Pulse transitions from a second tape track containing recorded data advance the second counter over a number of counts indicative of a correction factor. The pulse transitions of the recorded data are delayed in accordance with the correction factor thereby reducing the time base error.

摘要翻译： 数字减震系统，用于校正磁带上FM录音中变化的时基误差。 来自参考振荡器的输出和第一磁带上的参考音的脉冲转换通过触发器进行比较，触发器的输出是具有对应于时基误差的宽度的脉冲。 输出脉冲允许第一计数器提供加载到第二计数器中的数字输出。 来自包含记录数据的第二磁带的脉冲转换通过指示校正因子的多个计数提前第二计数器。 记录数据的脉冲转换根据校正因子而被延迟，从而减少时基误差。