专利快速检索-快速检索全球专利，免费商用专利数据库-IPRDB

1. 发明授权

US08411814B2 Method of and apparatus for measuring center detector index on CT scanner with limited field of view access 有权
标题翻译： CT扫描仪测量中心检测器指标的方法和设备，其视野范围有限
公开(公告)号：US08411814B2
公开(公告)日：2013-04-02
申请号：US13126608
申请日：2008-10-31
申请人： Ram C. Naidu , Sergey B. Simanovsky , David Schafer
发明人： Ram C. Naidu , Sergey B. Simanovsky , David Schafer
IPC分类号： A61B6/00 , G06K9/00
CPC分类号： A61B6/4028 , A61B6/4021 , A61B6/583
摘要： A position of a center detector of a radiation scanner can be determined without shutting down the scanner and/or manually positioning a phantom in the scanning field of the scanner. A phantom, comprising a target, is scanned to create an axial image of the phantom. The target is masked in the axial image, producing a masked axial image of the phantom. The masked axial image is reprojected in projection space, and the axial reprojection is compared to an axial projection or a rebinned axial projection of the phantom that was used to create the axial image. A target axial projection of data related to the masked target, created from the comparison of the axial projection or the rebinned axial projection and the axial reprojection, is used to determine the position of the center detector.
摘要翻译：可以确定辐射扫描器的中心检测器的位置，而不关闭扫描仪和/或在扫描仪的扫描场中手动放置体模。扫描包含目标的体模以产生体模的轴向图像。目标在轴向图像中被掩蔽，产生模仿的被屏蔽的轴向图像。掩蔽的轴向图像在投影空间中被重新投射，并且将轴向重新投影与用于产生轴向图像的假想的轴向投影或重新组合的轴向投影进行比较。使用由轴向投影或重新组合的轴向投影和轴向重投影的比较而产生的与被掩蔽的目标相关的数据的目标轴向投影，以确定中心检测器的位置。

2. 发明申请

US20110206180A1 METHOD OF AND APPARATUS FOR MEASURING CENTER DETECTOR INDEX ON CT SCANNER WITH LIMITED FIELD OF VIEW ACCESS 有权
标题翻译： CT扫描仪测量中心检测器指标的方法和设备
公开(公告)号：US20110206180A1
公开(公告)日：2011-08-25
申请号：US13126608
申请日：2008-10-31
申请人： Ram C. Naidu , Sergey B. Simanovsky , David Schafer
发明人： Ram C. Naidu , Sergey B. Simanovsky , David Schafer
IPC分类号： G01D18/00 , H05G1/26
CPC分类号： A61B6/4028 , A61B6/4021 , A61B6/583
摘要： A position of a center detector of a radiation scanner can be determined without shutting down the scanner and/or manually positioning a phantom in the scanning field of the scanner. A phantom, comprising a target, is scanned to create an axial image of the phantom. The target is masked in the axial image, producing a masked axial image of the phantom. The masked axial image is reprojected in projection space, and the axial reprojection is compared to an axial projection or a rebinned axial projection of the phantom that was used to create the axial image. A target axial projection of data related to the masked target, created from the comparison of the axial projection or the rebinned axial projection and the axial reprojection, is used to determine the position of the center detector.
摘要翻译：可以确定辐射扫描器的中心检测器的位置，而不关闭扫描仪和/或在扫描仪的扫描场中手动放置体模。扫描包含目标的体模以产生体模的轴向图像。目标在轴向图像中被掩蔽，产生模仿的被屏蔽的轴向图像。掩蔽的轴向图像在投影空间中被重新投射，并且将轴向重新投影与用于产生轴向图像的假想的轴向投影或重新组合的轴向投影进行比较。使用由轴向投影或重新组合的轴向投影和轴向重投影的比较而产生的与被掩蔽的目标相关的数据的目标轴向投影，以确定中心检测器的位置。

3. 发明授权

US08526895B2 Systems and methods of transmitter protection for wireless communications 有权
公开(公告)号：US08526895B2
公开(公告)日：2013-09-03
申请号：US13249186
申请日：2011-09-29
申请人： Ying Shen , David Schafer
发明人： Ying Shen , David Schafer
IPC分类号： H04B1/02
CPC分类号： H04L1/22 , H04B1/74 , H04B7/0617 , H04B7/0697 , H04W56/003
摘要： Various embodiments provide for systems and methods for wireless communications that implement transmitter protection schemes using spatial combining. The protection scheme implemented by some embodiments provides for a number of benefits, including without limitation: hitless protection; constant power monitoring for each wireless channel being utilized; extra gain to wireless signals transmitted; beam steering, beam hopping, and beam alignment capabilities; and varying levels of transmission path protection (e.g., 1+1 protection, or 1+N protection). Additionally, the features of some embodiments may be applied to a variety of wireless communications systems including, for example, microwave wireless systems, cellular phone systems and WiFi systems.

4. 发明申请

US20120128117A2 MULTI-CATHODE X-RAY TUBES WITH STAGGERED FOCAL SPOTS, AND SYSTEMS AND METHODS USING SAME 有权
标题翻译：具有STAGGERED FOCAL SPOTS的多管阴极X射线管，以及使用其的系统和方法
公开(公告)号：US20120128117A2
公开(公告)日：2012-05-24
申请号：US13059089
申请日：2008-08-29
申请人： Aleksander Roshi , Ram Naidu , David Schafer
发明人： Aleksander Roshi , Ram Naidu , David Schafer
IPC分类号： H01J35/06 , H01J35/08 , A61B6/03 , G01N23/04
CPC分类号： H01J35/06 , H01J35/14 , H01J35/24 , H01J2235/068
摘要： A source of X-rays including at least two cathodes and at least one common anode configured and arranged so as to generate at least two spaced apart beams of X-rays emanating from respectively different locations of the anode, and separately controlled so as to be generated independently of one another. The staggered focal spots can be generated simultaneously or alternately as required. An X-ray imaging system comprising such an X-rays source, and a method utilizing such a source are also disclosed.
摘要翻译：包括至少两个阴极和至少一个公共阳极的X射线源构造和布置成产生从阳极的不同位置发出的至少两个间隔开的X射线束，并分别被控制为彼此独立地产生。交错焦点可以根据需要同时或交替地产生。还公开了包括这种X射线源的X射线成像系统和利用这种源的方法。

5. 发明申请

US20090003515A1 METHOD OF AND SYSTEM FOR VARIABLE PITCH COMPUTED TOMOGRAPHY SCANNING FOR BAGGAGE SCREENING 失效
标题翻译：用于包围筛选的可变点阵计算机扫描方法和系统
公开(公告)号：US20090003515A1
公开(公告)日：2009-01-01
申请号：US11769370
申请日：2007-06-27
申请人： Ram Naidu , Basak Ulker Karbeyaz , Zhengrong Ying , Sergey Simanovsky , Matthew Hirsch , David Schafer , Carl R. Crawford
发明人： Ram Naidu , Basak Ulker Karbeyaz , Zhengrong Ying , Sergey Simanovsky , Matthew Hirsch , David Schafer , Carl R. Crawford
IPC分类号： G01N23/00
CPC分类号： G01V5/005 , A61B6/027 , G01T1/2985
摘要： A method of and a system for variable pitch CT scanning for baggage screening and variable pitch image reconstruction are disclosed. The method comprises decelerating conveyor belt speed when additional time is needed to render a decision on a complex bag; accelerating conveyor belt speed to its normal speed when decisions are reached on undecided bags; generating cone-beam projection data at variable scanning pitch corresponding to variable conveyor belt speed; computing a tilt angle and a distance offset for each tilted slice using the pitch values at which the cone-beam projection data is acquired for that tilted slice; generating fan-beam projection data for each tilted slice using the tilted angle and the distance offset; generating correction projection data to compensate for the error between the source trajectory and the tilted reconstruction plane; generating the corrected fan-beam projection data by adding the correction projection data to the fan-beam projection data; reconstructing tilted slices using the corrected fan-beam projection data; and interpolating the reconstructed tilted slices into axial slices.
摘要翻译：公开了用于行李筛选和可变间距图像重构的可变间距CT扫描的方法和系统。该方法包括在需要额外的时间来对复杂袋子做出决定时减速输送带速度; 加速输送带速度达到正常速度，在未定的袋子上达成决定; 产生对应于可变输送带速度的可变扫描间距的锥形束投影数据; 使用对于该倾斜切片获取锥形束投影数据的间距值来计算每个倾斜切片的倾斜角和距离偏移; 使用倾斜角度和距离偏移量为每个倾斜切片生成扇形投影数据; 产生校正投影数据以补偿源轨迹和倾斜重建平面之间的误差; 通过将校正投影数据添加到扇形投影数据来生成校正的扇形投影数据; 使用校正的扇形束投影数据重建倾斜的切片; 并将重构的倾斜切片内插到轴向切片中。

6. 发明授权

US07151817B1 X-ray inspection systems with improved radiation attenuation shielding 有权
标题翻译： X射线检测系统具有改进的辐射衰减屏蔽
公开(公告)号：US07151817B1
公开(公告)日：2006-12-19
申请号：US11224567
申请日：2005-09-12
申请人： Douglas Q. Abraham , Eric N. Finck , David Schafer
发明人： Douglas Q. Abraham , Eric N. Finck , David Schafer
IPC分类号： G01N23/04
CPC分类号： G01N23/046 , G01N2223/419 , G01V5/0016
摘要： Arrangements of X-ray inspection systems are described. An X-ray inspection system may include a shielded housing with a tunnel passageway and entrance and exit ports. The system may include an X-ray inspection station defining a rectilinear coordinate system, an X-ray source, and a detection system for generating images of articles that are located in the inspection station. A conveyor assembly may be included. A plurality of flexible X-ray attenuating, spaced-apart, hanging strips may be distributed within the shielded housing between the ports and across the entire tunnel passageway. The X-ray inspection system may include at least one curtain of flexible X-ray attenuating hanging strips. Each curtain may include a plurality of sets of contiguous strips, the strips of each set being of equal length and distributed across the tunnel passageway. The strips of at least one set are shorter than the strips of at least one other set.
摘要翻译：描述了X射线检查系统的安排。 X射线检查系统可以包括具有隧道通道和入口和出口的屏蔽壳体。该系统可以包括定义直线坐标系的X射线检查站，X射线源和用于产生位于检查台中的物品的图像的检测系统。可以包括输送机组件。多个柔性X射线衰减，间隔开的悬挂条可以在屏蔽壳体内分布在端口之间并穿过整个隧道通道。 X射线检查系统可以包括至少一个柔性X射线衰减悬挂条的帘幕。每个帘幕可以包括多组连续的条，每组的条具有相同的长度并分布在隧道通道上。至少一个组的条带比至少一个其他组的条带短。

7. 发明申请

US20060215874A1 Acoustic Assembly For A Transducer 有权
标题翻译：传感器声学组件
公开(公告)号：US20060215874A1
公开(公告)日：2006-09-28
申请号：US11277695
申请日：2006-03-28
申请人： Mekell Jiles , David Schafer , Anthony Minervini , Hanny Sunarto , Thomas Miller , Daniel Warren
发明人： Mekell Jiles , David Schafer , Anthony Minervini , Hanny Sunarto , Thomas Miller , Daniel Warren
IPC分类号： H04R17/02
CPC分类号： H04R7/125 , H04R7/10 , H04R7/20 , H04R9/00 , H04R11/00 , H04R11/02 , H04R25/00 , H04R31/003 , Y10T29/42 , Y10T29/435 , Y10T29/49002 , Y10T29/49005 , Y10T29/4908 , Y10T156/1052
摘要： An acoustic assembly for use in a transducer includes a multi-layer structure. A first layer member includes a first center portion, a first edge portion and a first aperture separating the first center portion and the first edge portion. A second layer member includes a second center portion, a second edge portion and a second aperture separating the second center portion and the second edge portion such that the second center portion is free to move relative to the second edge portion. The first and second layers are formed into an assembly wherein the first center portion and the second center portion are coupled, the first edge portion and the second edge portion are coupled, and the first aperture and the second aperture are substantially aligned to define a passageway. The assembly has an assembly stiffness that is greater than the stiffness of either the first or second layer members. A hinge joins the assembled first and second center portions and the first and second edge portions such that the assembled first and second center portions is free to at least partially rotate relative to the assembled first and second edge portions about an axis. A flexible layer member is coupled to the assembly and provides airtight sealing of the passageway.
摘要翻译：用于换能器的声学组件包括多层结构。第一层构件包括第一中心部分，第一边缘部分和将第一中心部分和第一边缘部分分开的第一孔。第二层构件包括第二中心部分，第二边缘部分和将第二中心部分和第二边缘部分分开的第二孔，使得第二中心部分相对于第二边缘部分自由移动。第一和第二层被形成为组合件，其中第一中心部分和第二中心部分联接，第一边缘部分和第二边缘部分被联接，并且第一孔和第二孔基本上对准以限定通道。组件具有大于第一或第二层构件的刚度的组件刚度。铰链将组装的第一和第二中心部分以及第一和第二边缘部分接合，使得组装的第一和第二中心部分相对于组装的第一和第二边缘部分围绕轴线自由地至少部分地旋转。柔性层构件联接到组件并且提供通道的气密密封。

8. 发明申请

US20060050677A1 System and method for minimizing guard time in a time division duplex communication system 审中-公开
公开(公告)号：US20060050677A1
公开(公告)日：2006-03-09
申请号：US11262922
申请日：2005-11-01
申请人： David Schafer
发明人： David Schafer
IPC分类号： H04J3/00
CPC分类号： H04W72/0486 , H04B7/2656 , H04J3/0682 , H04W28/06 , H04W56/003 , H04W56/0045 , H04W72/10
摘要： Disclosed is a system and method for optimizing capacity in a multi-user time division duplex (“TDD”) communication system such as a broadband wireless radio frequency communication system. More specifically the invention minimizes guard time in duplexed signals to thereby allow for higher data throughput which results in an increase in system communication capacity. Depending upon instantaneous traffic load associated with the subscribers using a particular TDD carrier, guard times may be adjusted to provide a desired level of throughput. As traffic loads demand, the order of assignment of burst periods in either or both the transmit and receive frames of a TDD carrier with respect to the subscriber systems operable thereon are adjusted to accommodate desired guard times.

9. 发明授权

US08885938B2 Detecting concealed threats 有权
标题翻译：检测隐藏的威胁
公开(公告)号：US08885938B2
公开(公告)日：2014-11-11
申请号：US13126622
申请日：2008-10-30
申请人： Baoming Hong , Julia Pavlovich , David Schafer , Zhengrong Ying
发明人： Baoming Hong , Julia Pavlovich , David Schafer , Zhengrong Ying
IPC分类号： G06K9/34 , G06K9/00 , G01N23/04 , G06K9/62
CPC分类号： G06K9/00771 , G06K9/6247 , G06K2209/09
摘要： Potential threat items may be concealed inside objects, such as portable electronic devices, that are subject to imaging for example, at a security checkpoint. Data from an imaged object can be compared to pre-determined object data to determine a class for the imaged object. Further, an object can be identified inside a container (e.g., a laptop inside luggage). One-dimensional Eigen projections can be used to partition the imaged object into partitions, and feature vectors from the partitions and the object image data can be used to generate layout feature vectors. One or more layout feature vectors can be compared to training data for threat versus non-threat-containing items from the imaged object's class to determine if the imaged object contains a potential threat item.
摘要翻译：潜在威胁物品可能隐藏在诸如便携式电子设备的物体内，例如在安全检查点进行成像。来自成像对象的数据可以与预定对象数据进行比较，以确定成像对象的类。此外，可以在容器（例如，行李箱内的膝上型计算机）内识别物体。可以使用一维特征投影来将成像对象分割成分区，并且来自分区和对象图像数据的特征向量可用于生成布局特征向量。可以将一个或多个布局特征向量与来自成像对象的类的威胁与不含威胁的项目的训练数据进行比较，以确定成像对象是否包含潜在的威胁项目。

10. 发明授权

US07724866B2 Method of and system for variable pitch computed tomography scanning for baggage screening 失效
标题翻译：可变间距计算机断层扫描扫描行李的方法和系统
公开(公告)号：US07724866B2
公开(公告)日：2010-05-25
申请号：US11769370
申请日：2007-06-27
申请人： Ram Naidu , Basak Ulker Karbeyaz , Zhengrong Ying , Sergey Simanovsky , Matthew Hirsch , David Schafer , Carl R. Crawford
发明人： Ram Naidu , Basak Ulker Karbeyaz , Zhengrong Ying , Sergey Simanovsky , Matthew Hirsch , David Schafer , Carl R. Crawford
IPC分类号： A61B6/03
CPC分类号： G01V5/005 , A61B6/027 , G01T1/2985
摘要： A method of and a system for variable pitch CT scanning for baggage screening and variable pitch image reconstruction are disclosed. The method comprises decelerating conveyor belt speed when additional time is needed to render a decision on a complex bag; accelerating conveyor belt speed to its normal speed when decisions are reached on undecided bags; generating cone-beam projection data at variable scanning pitch corresponding to variable conveyor belt speed; computing a tilt angle and a distance offset for each tilted slice using the pitch values at which the cone-beam projection data is acquired for that tilted slice; generating fan-beam projection data for each tilted slice using the tilted angle and the distance offset; generating correction projection data to compensate for the error between the source trajectory and the tilted reconstruction plane; generating the corrected fan-beam projection data by adding the correction projection data to the fan-beam projection data; reconstructing tilted slices using the corrected fan-beam projection data; and interpolating the reconstructed tilted slices into axial slices.
摘要翻译：公开了用于行李筛选和可变间距图像重构的可变间距CT扫描的方法和系统。该方法包括在需要额外的时间来对复杂袋子做出决定时减速输送带速度; 加速输送带速度达到正常速度，在未定的袋子上达成决定; 产生对应于可变输送带速度的可变扫描间距的锥形束投影数据; 使用对于该倾斜切片获取锥形束投影数据的间距值来计算每个倾斜切片的倾斜角和距离偏移; 使用倾斜角度和距离偏移量为每个倾斜切片生成扇形投影数据; 产生校正投影数据以补偿源轨迹和倾斜重建平面之间的误差; 通过将校正投影数据添加到扇形投影数据来生成校正的扇形投影数据; 使用校正的扇形束投影数据重建倾斜的切片; 并将重构的倾斜切片内插到轴向切片中。

你已经成功收藏专利！

检索式保存成功!

IPRDB

热门服务

关于我们

友情链接

联系方式