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1. 发明授权

US4780897A Dual energy imaging with kinestatic charge detector 失效
标题翻译：双能量成像与动力电荷检测器
公开(公告)号：US4780897A
公开(公告)日：1988-10-25
申请号：US860329
申请日：1986-05-06
申请人： David L. McDaniel , Paul R. Granfors , Gary S. Keyes
发明人： David L. McDaniel , Paul R. Granfors , Gary S. Keyes
IPC分类号： A61B6/00 , A61B6/03 , G01T1/164 , G01T1/29 , H01J47/02 , G01N23/04
CPC分类号： A61B6/482 , A61B6/4035 , A61B6/405 , A61B6/4241 , G01T1/2935 , H01J47/02 , A61B6/032
摘要： A method and apparatus for providing dual energy radiation images of a patient in a kinestatic charge detection system utilizes first and second kinestatic charge detectors commonly connected to apparatus for rotating the detectors about a radiation source at a predetermined velocity. The detectors are adjusted such that ion drift velocity in each detector is equal in magnitude but opposite in direction to the velocity of rotation of the detectors. The radiation from the radiation source is modulated such that relatively low average energy radiation impinging on the patient is received by the first detector and relatively high average energy radiation impinging on the patient is received by the second detector. As the radiation is scanned across the patient and received by the detectors, output data from each detector provides information representative of the intensity of radiation received during the scan. The output data is then combined by a imaging system to form a difference image.
摘要翻译：用于在运动电荷检测系统中提供患者的双能量辐射图像的方法和装置利用通常连接到用于以预定速度围绕辐射源旋转检测器的装置的第一和第二运动电荷检测器。调整检测器，使得每个检测器中的离子漂移速度在幅度上相等，但与检测器的旋转速度相反。来自辐射源的辐射被调制成使得照射在患者上的相对低的平均能量辐射由第一检测器接收，并且由第二检测器接收相对高的平均能量辐射照射在患者身上。当辐射被扫描穿过患者并由检测器接收时，来自每个检测器的输出数据提供表示扫描期间接收的辐射强度的信息。然后，输出数据由成像系统组合以形成差分图像。

2. 发明授权

US4764679A Kinestatic charge detector 失效
标题翻译：金属电荷检测器
公开(公告)号：US4764679A
公开(公告)日：1988-08-16
申请号：US895725
申请日：1986-08-12
申请人： David L. McDaniel , Paul R. Granfors , David M. Hoffman
发明人： David L. McDaniel , Paul R. Granfors , David M. Hoffman
IPC分类号： A61B6/00 , G01T1/185 , H01J47/02 , H01J47/00
CPC分类号： H01J47/02
摘要： Quantum detection efficiency and spatial resolution in a kinestatic charge detector are improved by utilization of an x-ray transmissive device positioned within a collection volume of a kinestatic charge detector x-ray detection chamber for displacing the charge carrier generating medium within predetermined areas of the chamber. Within the chamber, quantum detection efficiency and spatial resolution are affected by distortion in electric field lines existing between a high voltage anode and a relatively low voltage collector electrode. The distorted field lines cause charge carriers generated in the medium by impinging radiation to impact on either the walls of the chamber or to follow non-linear paths between the point of creation and the collection electrode. By displacing the medium in the chamber in areas having the greatest electric field distortion, the quantum detection efficiency and spatial resolution are improved. In one embodiment an x-ray transmissive device is placed in the chamber adjacent an x-ray emitting window and has a portion extending partially into the space between the anode and collector electrode. In another embodiment, an additional device is positioned in the chamber adjacent a rear wall thereof for displacing the medium in the rear portion of the chamber.
摘要翻译：通过利用位于感性电荷检测器x射线检测室的收集体积内的x射线透射装置来改善活性电荷检测器中的量子检测效率和空间分辨率，用于将电荷载体产生介质置于腔室的预定区域内。在室内，量子检测效率和空间分辨率受到存在于高压阳极和相对低压集电极之间的电场线的失真的影响。畸变的场线引起在介质中产生的电荷载体，通过冲击辐射来冲击室的壁或者沿着创建点和收集电极之间的非线性路径。通过在具有最大电场失真的区域中移动腔室中的介质，提高了量子检测效率和空间分辨率。在一个实施例中，x射线透射装置被放置在邻近X射线发射窗口的腔室中，并且具有部分地延伸到阳极和集电极之间的空间的部分。在另一个实施例中，附加装置邻近其后壁定位在腔室中，用于移动腔室后部的介质。

3. 发明授权

US4686369A Electric shielding for kinestatic charge detector 失效
标题翻译：电动感应电磁屏蔽
公开(公告)号：US4686369A
公开(公告)日：1987-08-11
申请号：US808610
申请日：1985-12-13
申请人： David L. McDaniel , Paul R. Granfors , David M. Hoffman
发明人： David L. McDaniel , Paul R. Granfors , David M. Hoffman
IPC分类号： G01T1/16 , G01T1/29 , H01J47/02 , G01T1/185
CPC分类号： H01J47/02
摘要： An apparatus for detecting propogating energy in a defined space includes a medium disposed within the space which interacts with the incident propogating energy to produce secondary energy. An electrostatic field is impressed across the defined space for directing the secondary energy toward a planar detector located at one end of the space. Adjacent the detector is positioned a planar grid for preventing the secondary energy from being detected by the detector prior to passage through the grid. The grid comprises a three layer device having a middle layer formed of an electrically insulative sheet material of a relatively stiff structure. The other two layers comprise conductive layers on opposed surfaces of the first layer which are connected to an electric potential for creating a field across the grid structure and a further field between the grid structure and the detector for accelerating the secondary energy toward the detector in the area of the grid at a space between the grid and detector.
摘要翻译：用于在限定的空间中检测传播能量的装置包括设置在空间内的介质，其与入射的传播能量相互作用以产生二次能量。静电场穿过限定的空间，用于将二次能量引向位于空间一端的平面探测器。邻近探测器的平面格栅被设置成防止二次能量在通过栅格之前被检测器检测到。栅格包括具有由相对刚性结构的电绝缘片材形成的中间层的三层器件。另外两个层包括在第一层的相对表面上的导电层，其连接到用于在栅格结构之间产生场的电位，并且在栅格结构和检测器之间的另外的场，用于在第二层中加速次级能量朝向检测器网格与检测器间的空间区域。

4. 发明授权

US4947416A Scanning equalization radiography with stationary equalization detector 失效
标题翻译：使用固定均衡检测器扫描均衡射线照相
公开(公告)号：US4947416A
公开(公告)日：1990-08-07
申请号：US260769
申请日：1988-10-21
申请人： James A. McFaul , Gary S. Keyes , David L. McDaniel
发明人： James A. McFaul , Gary S. Keyes , David L. McDaniel
IPC分类号： A61B6/00 , A61B6/03 , A61B6/06 , G01T20060101 , G21K1/04 , H01J47/02 , H05G1/00 , H05G1/36
CPC分类号： A61B6/032 , A61B6/06 , A61B6/4035 , G21K1/04 , H01J47/02 , A61B6/4291
摘要： A scanning type radiographic imaging system is disclosed which employs novel means to produce comparable radiation intensity in the object regions being radiographed. Such result is achieved with variable radiation attenuating elements having their attenuation controlled during this scanning process with novel feedback control means. The feedback control is produced with a stationary detection unit having circuit means which generates the electrical control signals.

5. 发明授权

US07667457B2 System and apparatus for detecting gamma rays in a PET/MRI scanner 有权
标题翻译：用于检测PET / MRI扫描仪中的γ射线的系统和装置
公开(公告)号：US07667457B2
公开(公告)日：2010-02-23
申请号：US11615324
申请日：2006-12-22
申请人： Anton M. Linz , Chang L. Kim , Jim L. Malaney , David L. McDaniel , Robert S. Stormont , Ricardo Becerra
发明人： Anton M. Linz , Chang L. Kim , Jim L. Malaney , David L. McDaniel , Robert S. Stormont , Ricardo Becerra
IPC分类号： G01V3/00
CPC分类号： G01R33/28 , G01R33/481 , G01T1/1603
摘要： A gamma ray detector ring for a combined positron emission tomography (PET) and magnetic resonance imaging (MRI) system is integrated into a radio frequency (RF) coil assembly such that the detector ring is integrated with a RF shield. Each gamma ray detector in the detector ring includes a scintillator component that emits light when a gamma ray is detected and a photodetector component designed to be sensitive to the frequency of light produced by the scintillator. A RF shield may be integrated into a detector ring such that the RF shield is positioned between the scintillator and photodetector components of each detector, thereby saving valuable radial space within the imaging system. Multiple such detector rings may be located adjacent to one another to increase axial coverage and enable three-dimensional PET imaging techniques.
摘要翻译：用于组合正电子发射断层摄影（PET）和磁共振成像（MRI）系统的伽马射线检测器环集成到射频（RF）线圈组件中，使得检测器环与RF屏蔽集成。检测器环中的每个伽马射线检测器包括当检测到伽马射线时发光的闪烁体部件和设计成对由闪烁体产生的光的频率敏感的光检测器部件。 RF屏蔽可以集成到检测器环中，使得RF屏蔽物位于每个检测器的闪烁体和光电检测器部件之间，从而在成像系统内节省有价值的径向空间。多个这样的检测器环可以彼此相邻放置以增加轴向覆盖并且能够进行三维PET成像技术。

6. 发明授权

US06852978B2 Crystal-based coincidence timing calibration method 失效
公开(公告)号：US06852978B2
公开(公告)日：2005-02-08
申请号：US10284800
申请日：2002-10-31
申请人： John J. Williams , Dershan Luo , Mark K. Limkeman , Michael J. Cook , David L. McDaniel , Edwin L. Oswalt , Mark P. Feilen
发明人： John J. Williams , Dershan Luo , Mark K. Limkeman , Michael J. Cook , David L. McDaniel , Edwin L. Oswalt , Mark P. Feilen
IPC分类号： G01T1/161 , G01T1/164 , G01T1/172 , G01T1/29
CPC分类号： G01T1/2985
摘要： A method of calibrating detectors in a detector ring of a PET scanner, each detector including a plurality of crystals, the PET scanner having a field of view, is disclosed. The method comprises collecting timing data indicative of coincidence events occurring between each pair of crystals within the field of view. The method further comprises determining a detector adjustment value for each detector, determining a crystal adjustment value for each crystal in each detector, and discretizing the crystal adjustment value for each crystal to produce a discretized crystal adjustment value for each crystal. Lastly, the method comprises calibrating each detector by applying the discretized crystal adjustment value for each crystal in each detector to the collected timing data indicative of coincidence events.

7. 发明申请

US20080265887A1 SYSTEM AND APPARATUS FOR DETECTING GAMMA RAYS IN A PET/MRI SCANNER 有权
标题翻译：用于检测PET / MRI扫描仪中的GAMMA RAYS的系统和装置
公开(公告)号：US20080265887A1
公开(公告)日：2008-10-30
申请号：US11615324
申请日：2006-12-22
申请人： Anton M. Linz , Chang L. Kim , Jim L. Malaney , David L. McDaniel , Robert S. Stormont , Ricardo Becerra
发明人： Anton M. Linz , Chang L. Kim , Jim L. Malaney , David L. McDaniel , Robert S. Stormont , Ricardo Becerra
IPC分类号： G01R33/28 , G01T1/20
CPC分类号： G01R33/28 , G01R33/481 , G01T1/1603
摘要： A gamma ray detector ring for a combined positron emission tomography (PET) and magnetic resonance imaging (MRI) system is integrated into a radio frequency (RF) coil assembly such that the detector ring is integrated with a RF shield. Each gamma ray detector in the detector ring includes a scintillator component that emits light when a gamma ray is detected and a photodetector component designed to be sensitive to the frequency of light produced by the scintillator. A RF shield may be integrated into a detector ring such that the RF shield is positioned between the scintillator and photodetector components of each detector, thereby saving valuable radial space within the imaging system. Multiple such detector rings may be located adjacent to one another to increase axial coverage and enable three-dimensional PET imaging techniques.
摘要翻译：用于组合正电子发射断层摄影（PET）和磁共振成像（MRI）系统的伽马射线检测器环集成到射频（RF）线圈组件中，使得检测器环与RF屏蔽集成。检测器环中的每个伽马射线检测器包括当检测到伽马射线时发光的闪烁体部件和设计成对由闪烁体产生的光的频率敏感的光检测器部件。 RF屏蔽可以集成到检测器环中，使得RF屏蔽物位于每个检测器的闪烁体和光电检测器部件之间，从而在成像系统内节省有价值的径向空间。多个这样的检测器环可以彼此相邻放置以增加轴向覆盖并且能够进行三维PET成像技术。

8. 发明授权

US5347590A Spatial filter for an image processing system 失效
标题翻译：用于图像处理系统的空间滤波器
公开(公告)号：US5347590A
公开(公告)日：1994-09-13
申请号：US712764
申请日：1991-06-10
申请人： Edward D. Nonnweiler , David L. McDaniel
发明人： Edward D. Nonnweiler , David L. McDaniel
IPC分类号： A61B6/00 , G06T1/00 , G06T5/00 , G06T5/20 , H04N5/32 , H05G1/60 , G06K9/00
CPC分类号： G06T5/20 , H04N5/32 , H05G1/60 , G06T2207/10116 , G06T2207/30004
摘要： An medical imaging system includes a photodetector array which converts an X-ray image into a series of picture elements arranged in rows and columns of a two dimensional matrix. The picture elements are read from the array on a column by column basis. A spatial filter for the picture elements includes a first filter that applies one filter function to the pixels in each column of the image. The partially filtered pixels are stored in a first memory and then read therefrom row by row in a field interlaced order. The rows of picture elements are sent to a second filter that applies another filter function to each row. The fully filtered picture elements from the second filter either are stored or converted to a video signal for display.
摘要翻译：医疗成像系统包括将X射线图像转换为以二维矩阵的行和列排列的一系列图像元素的光电检测器阵列。图像元素从列开始逐列读取。用于图像元素的空间滤波器包括对图像的每列中的像素应用一个滤波器函数的第一滤波器。部分滤波的像素被存储在第一存储器中，然后以字段交织顺序逐行读取。图像元素的行被发送到第二过滤器，其对每行应用另一个过滤器功能。来自第二滤波器的完全滤波的图像元素被存储或转换成用于显示的视频信号。

9. 发明授权

US07088901B2 Light guide apparatus and method for a detector array 有权
标题翻译：用于检测器阵列的导光装置和方法
公开(公告)号：US07088901B2
公开(公告)日：2006-08-08
申请号：US10635531
申请日：2003-08-07
申请人： Chang L. Kim , David L. McDaniel
发明人： Chang L. Kim , David L. McDaniel
IPC分类号： G02B6/10
CPC分类号： G02B6/10 , G02B6/08
摘要： According to one aspect, the invention relates to a light guide which may include a first surface which receives light, a second surface which emits light, wherein the second surface is parallel to the first surface and the second surface has a smaller area than the first surface, at least one edge surface which extends between the first surface and the second surface, and a light barrier which extends between the first surface and the second surface, wherein the light barrier divides the light guide into separate regions and reduces the propagation of light between the separate regions. The light guide can be used in a positron emission tomography scanner.
摘要翻译：根据一个方面，本发明涉及一种光导，其可以包括接收光的第一表面，发射光的第二表面，其中第二表面平行于第一表面，而第二表面具有比第一表面小的第一表面表面，在所述第一表面和所述第二表面之间延伸的至少一个边缘表面，以及在所述第一表面和所述第二表面之间延伸的光屏障，其中所述光栅将所述光导分割成单独的区域并减少光的传播在不同的区域之间。光导可用于正电子发射断层扫描仪。

10. 发明授权

US4969174A Scanning mammography system with reduced scatter radiation 失效
标题翻译：扫描乳腺X线照相系统减少散射辐射
公开(公告)号：US4969174A
公开(公告)日：1990-11-06
申请号：US403680
申请日：1989-09-06
申请人： Carl C. Scheid , James A. McFaul , David L. McDaniel , Norbert J. Pelc , David M. Barrett
发明人： Carl C. Scheid , James A. McFaul , David L. McDaniel , Norbert J. Pelc , David M. Barrett
IPC分类号： G01N23/04 , A61B6/00 , A61B6/04 , A61B6/06 , G21K1/02 , G21K1/04 , G21K1/10 , H05G1/00
CPC分类号： A61B6/502 , A61B6/4291 , A61B6/4441 , A61B6/544 , A61B6/56 , G21K1/02
摘要： Method and apparatus for minimizing scatter in an X-ray imaging system of the type including a controllable source of X-ray radiation and means for collimating the X-ray radiation into a fan-shaped beam and effecting scanning of the X-ray beam across a target area. The improved system includes a grid assembly extending in a transverse direction across the target area and having a relatively narrow width in the beam scanning direction. A drive is coupled to the grid removing the grid in synchronism with the X-ray beam and an X-ray impervious belt is coupled to the grid and extends in a transverse direction across the target area and is movable with the grid for covering the target area outside the grid to prevent scatter radiation from impinging on X-ray film located beneath the grid. In one form, the grid includes a plurality of air interspersed septa to allow reduced beam energy. In another form, the X-ray beam is collimated into a point source by the use of an X-ray impervious disk positioned adjacent to and overlaying an X-ray window in the X-ray source.

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