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1.发明授权Method and apparatus for reconstructing images from projection data acquired by a computed tomography system 失效用于从由计算机断层摄影系统获取的投影数据重建图像的方法和装置公开(公告)号：US06324243B1
公开(公告)日：2001-11-27
申请号：US09511678
申请日：2000-02-23
IPC分类号： A61B603
CPC分类号： A61B6/469 , A61B6/032 , Y10S378/901
摘要： A method and apparatus for use with a volumetric computed tomography (CT) scanning system. In accordance with the present invention, the volumetric CT scanning system utilizes an area detector to acquire projection data. The acquired projection data is stored in memory. The projection data corresponding to groups of pixels of the detector is then rebinned to thereby reduce the amount of projection data that will be utilized in performing an initial volumetric reconstruction of the image. The reconstructed image may then be processed to identify particular regions of interest, such as a pathology. If a particular region of interest is identified, all of the projection data corresponding to the region is then used to retrospectively reconstruct a high resolution image of the region of interest. The retrospectively reconstructed high resolution image can then be processed and analyzed to further evaluate the region of interest.
摘要翻译： 一种用于体积计算机断层摄影（CT）扫描系统的方法和装置。 根据本发明，体积CT扫描系统利用区域检测器来获取投影数据。 所获取的投影数据被存储在存储器中。 然后，对应于检测器的像素组的投影数据被重新组合，从而减少在执行图像的初始体积重建时将被使用的投影数据的量。 然后可以处理重建的图像以识别感兴趣的特定区域，例如病理学。 如果识别出特定的感兴趣区域，则所有与该区域相对应的投影数据然后用于追溯地重构感兴趣区域的高分辨率图像。 然后可以对回顾性重建的高分辨率图像进行处理和分析，以进一步评估感兴趣的区域。
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公开(公告)号：US06793496B2
公开(公告)日：2004-09-21
申请号：US10085726
申请日：2002-02-28
IPC分类号： G09B2328
CPC分类号： G09B23/28 , G06F19/00 , G06T11/006 , G06T13/20 , G06T19/20 , G06T2210/41 , G06T2211/412 , G06T2219/2016 , G06T2219/2021
摘要： The present invention provides a model and a method and apparatus for utilizing the model to simulate an imaging scenario. The model is mathematically defined by analytical basis objects and/or polygonal basis objects. Preferably, the model is a model of the human heart and thorax. Polygonal basis objects are only used to define structures in the model that experience torsion, such as certain structures in the heart that experience torsion during the cardiac cycle. The manner in which the basis objects comprising the model are transformed by scaling, translation and rotation is defined for each basis object. In the case where a basis object experiences torsion, the rotation of the basis object will change as a function of the length along the axis of the basis object about which rotation is occurring. During an imaging system simulation, the model is utilized by a forward projection routine, which integrates the linear attenuation coefficients associated with the rays emitted by a simulated x-ray source and collected by a simulated detector array to obtain line integrals corresponding to forward projection data. The forward projection data is then processed to take into account the physics of the imaging technology, the x-ray source and the detector array. The processed projection data is then processed and back-projected by a reconstruction modeling routine to produce a reconstructed representation of the model of the heart as a function of time.
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公开(公告)号：US07333648B2
公开(公告)日：2008-02-19
申请号：US10862101
申请日：2004-06-04
CPC分类号： G06T7/0012 , A61B6/508 , A61B6/541 , G06T7/62 , G06T2207/10081 , G06T2207/30101
摘要： Techniques, hardware, and software are provided for quantification of extensional features of structures of an imaged subject from image data representing a two-dimensional or three-dimensional image. In one embodiment, stenosis in a blood vessel may be quantified from volumetric image data of the blood vessel. A profile from a selected family of profiles is fit to selected image data. An estimate of cross sectional area of the blood vessel is generated based on the fit profile. Area values may be generated along a longitudinal axis of the vessel, and a one-dimensional profile fit to the generated area values. An objective quantification of stenosis in the vessel may be obtained from the area profile. In some cases, volumetric image data representing the imaged structure may be reformatted to facilitate the quantification, when the structural feature varies along a curvilinear axis. A mask is generated for the structural feature to be quantified based on the volumetric image data. A curve representing the curvilinear axis is determined from the mask by center-finding computations, such as moment calculations, and curve fitting. Image data are generated for oblique cuts at corresponding selected orientations with respect to the curvilinear axis, based on the curve and the volumetric image data. The oblique cuts may be used for suitable further processing, such as image display or quantification.
摘要翻译： 提供了技术，硬件和软件，用于从表示二维或三维图像的图像数据中量化成像对象的结构的延伸特征。 在一个实施例中，可以从血管的体积图像数据量化血管中的狭窄。 所选择的配置文件系列的配置文件适合所选的图像数据。 基于拟合曲线产生血管横截面面积的估计。 面积值可以沿着容器的纵向轴线产生，并且一维轮廓拟合到所产生的面积值。 可以从区域剖面中获得容器中狭窄的客观量化。 在一些情况下，当结构特征沿着曲线轴线变化时，表示成像结构的体积图像数据可以重新格式化以便于定量。 基于体积图像数据生成要量化的结构特征的掩模。 表示曲线轴的曲线通过中心位置计算（如力矩计算）和曲线拟合从掩模确定。 基于曲线和体积图像数据，生成针对相对于曲线轴的相应选定取向的倾斜切割的图像数据。 倾斜切口可以用于适当的进一步处理，例如图像显示或定量。
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公开(公告)号：US09648523B2
公开(公告)日：2017-05-09
申请号：US12274901
申请日：2008-11-20
申请人： Srinivasan Balasubramanian , Jen Mei Chen , Manoj M. Deshpande , Mehmet Yavuz , Sanjiv Nanda , Gavin B. Horn
发明人： Srinivasan Balasubramanian , Jen Mei Chen , Manoj M. Deshpande , Mehmet Yavuz , Sanjiv Nanda , Gavin B. Horn
CPC分类号： H04W36/0055 , H04W36/04 , H04W84/045
摘要： In a handover operation an access terminal is handed over from a source access point to a target access point. To facilitate efficient identification of a target access point, a handover operation may be initiated by the target access point. A candidate frequency search also may be invoked to confirm that an access terminal identified by a target access point for a handover is in the vicinity of the target access point. A source access point may verify whether an access terminal is in a vicinity of a target access point to determine whether to perform a handover operation. A source access point may handle potential ambiguity between several target access points by sending handover commands to each of these target access points. An access terminal also may assist in the determination of whether to perform a handover operation.
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公开(公告)号：US09497714B2
公开(公告)日：2016-11-15
申请号：US13241101
申请日：2011-09-22
申请人： Sumeeth Nagaraja , Farhad Meshkati , Mehmet Yavuz , Suhas Mitra , Varun Khaitan , Vansh Pal Singh Makh , Chirag Sureshbhai Patel , Yeliz Tokgoz , Cong Shen
发明人： Sumeeth Nagaraja , Farhad Meshkati , Mehmet Yavuz , Suhas Mitra , Varun Khaitan , Vansh Pal Singh Makh , Chirag Sureshbhai Patel , Yeliz Tokgoz , Cong Shen
CPC分类号： H04W52/244 , H04B17/391 , H04W24/10 , H04W52/243 , H04W88/08
摘要： A power calibration scheme adjusts power levels of network of femtocells based on macro signals seen at different points in and around a coverage area and based on the mutual positions of the femtocells (e.g., based on femtocell signals seen at these points). The power calibration scheme thus facilitates a good balance between providing a desired level of coverage and mitigation of interference to nearby macrocells and femtocells.
摘要翻译： 功率校准方案基于在覆盖区域内和周围的不同点处看到的宏信号并且基于毫微微小区的相互位置（例如，基于在这些点处看到的毫微微小区信号）来调整毫微微小区的网络的功率水平。 因此，功率校准方案有助于在提供期望的覆盖水平和减轻对附近的宏小区和毫微微小区的干扰之间的良好平衡。
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6.发明授权公开(公告)号：US09008714B2
公开(公告)日：2015-04-14
申请号：US13331395
申请日：2011-12-20
申请人： Yeliz Tokgoz , Mehmet Yavuz , Farhad Meshkati
发明人： Yeliz Tokgoz , Mehmet Yavuz , Farhad Meshkati
CPC分类号： H04W52/244 , H04B17/345 , H04W52/225 , H04W52/243
摘要： Methods and apparatuses are provided that include adjusting rise-over-thermal (RoT) or noise rise (NR) threshold based on detecting interference from one or more devices. A device can communicate within close proximity of a femto node such that the device does not respond to power down commands from the femto node due to operating at a minimum transmit power. The device can cause the RoT or NR at the femto node to potentially rise over a threshold, however. Thus, the femto node can increase the RoT or NR threshold to allow the device to communicate with the femto node without impacting other devices communicating with the femto node. Out-of-cell interference from devices communicating with other base stations can be detected as well, and the RoT or NR threshold can be adjusted based thereon.
摘要翻译： 提供了包括基于检测来自一个或多个设备的干扰来调整上升热（RoT）或噪声上升（NR）阈值的方法和装置。 设备可以在毫微微节点的非常接近的范围内通信，使得设备由于以最小的发射功率运行而不响应来自毫微微节点的掉电命令。 然而，该设备可能导致毫微微节点处的RoT或NR潜在地超过阈值。 因此，毫微微节点可以增加RoT或NR阈值，以允许设备与毫微微节点通信，而不影响与毫微微节点通信的其他设备。 也可以检测来自与其他基站通信的设备的小区外干扰，并且可以基于此来调整RoT或NR阈值。
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7.发明授权公开(公告)号：US09002358B2
公开(公告)日：2015-04-07
申请号：US12849947
申请日：2010-08-04
申请人： Peerapol Tinnakornsrisuphap , Chirag Sureshbhai Patel , Mehmet Yavuz , Peter Hans Rauber , Ravindra Manohar Patwardhan
发明人： Peerapol Tinnakornsrisuphap , Chirag Sureshbhai Patel , Mehmet Yavuz , Peter Hans Rauber , Ravindra Manohar Patwardhan
CPC分类号： H04W36/0061 , H04W36/08 , H04W84/045 , H04W88/02 , H04W88/08
摘要： An access point is identified based on a plurality of pilot signatures. Here, in addition to transmitting a pilot signal that is encoded (e.g., spread/scrambled) using a particular pilot signature, an access point transmits a message that includes at least one indication of at least one other pilot signature. For example, an access point may use one PN offset to generate a pilot signal and transmit a message that identifies at least one other PN offset. An access terminal that receives the pilot signal and the message may then generate a pilot report that identifies all of these pilot signatures. Upon receiving a handover message including this pilot-related information, a target network entity with knowledge of the pilot signatures assigned to that access point may then accurately identify the access point as a target for handover of the access terminal.
摘要翻译： 基于多个导频签名识别接入点。 这里，除了发送使用特定导频签名进行编码（例如，扩频/加扰）的导频信号之外，接入点还发送包括至少一个其他导频签名的指示的消息。 例如，接入点可以使用一个PN偏移来产生导频信号并发送标识至少一个其它PN偏移的消息。 然后，接收导频信号和消息的接入终端可以生成识别所有这些导频签名的导频报告。 在接收到包括该导频相关信息的切换消息时，具有分配给该接入点的导频签名知识的目标网络实体可以准确地将接入点识别为接入终端的切换目标。
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8.发明授权Interference management in a wireless communication system using frequency selective transmission 有权使用频率选择性传输的无线通信系统中的干扰管理公开(公告)号：US08948095B2
公开(公告)日：2015-02-03
申请号：US12276906
申请日：2008-11-24
申请人： Peter J. Black , Mingxi Fan , Sarut Vanichpun , Mehmet Yavuz
发明人： Peter J. Black , Mingxi Fan , Sarut Vanichpun , Mehmet Yavuz
CPC分类号： H04W72/085 , H04L25/03343
摘要： Interference that occurs during wireless communication may be managed by determination of a selected transmit waveform exhibiting a preferred channel quality. A method, apparatus and medium of communication determine a transmit waveform from among a plurality of allocated waveforms of an unplanned access point to an associated access terminal. The transmit waveform exhibiting a highest channel quality with an associated access terminal over others of the plurality of allocated waveforms is determined. Signals are transmitted according to the transmit waveform from the unplanned access point to the associated access terminal.
摘要翻译： 在无线通信期间发生的干扰可以通过确定显示优选信道质量的所选择的发送波形来进行管理。 一种通信的方法，装置和介质确定从计划外接入点的多个分配的波形到相关联的接入终端的发射波形。 确定与多个分配波形中的其他接收终端相对应的接入终端呈现最高信道质量的发送波形。 信号根据从计划外接入点到相关接入终端的发射波形传输。
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公开(公告)号：US08923892B2
公开(公告)日：2014-12-30
申请号：US13106725
申请日：2011-05-12
申请人： Yan Zhou , Damanjit Singh , Farhad Meshkati , Mehmet Yavuz
发明人： Yan Zhou , Damanjit Singh , Farhad Meshkati , Mehmet Yavuz
CPC分类号： H04W36/0083 , H04W8/005 , H04W64/00 , H04W84/045
摘要： Techniques are described herein for updating proximity information associated with a femtocell in a wireless communication system. An example of a method described herein includes identifying a location within a wireless communication network, associating the location with a femtocell for which proximity information relating to position of the femtocell is maintained, performing at least one search for the femtocell, and updating the proximity information maintained for the femtocell based on results of the at least one search. Another example of a method described herein includes obtaining a report of proximity information relating to a femtocell, identifying one or more network devices for which the proximity information is relevant, and communicating proximity information update signaling to the one or more network devices.
摘要翻译： 这里描述了用于在无线通信系统中更新与毫微微小区相关联的邻近信息的技术。 本文描述的方法的示例包括识别无线通信网络内的位置，将位置与维持与毫微微蜂窝基站的位置有关的接近信息的毫微微小区相关联，对毫微微蜂窝进行至少一次搜索，并更新邻近信息 基于至少一次搜索的结果为毫微微小区维护。 本文描述的方法的另一示例包括获得与毫微微小区有关的邻近信息的报告，识别接近信息相关的一个或多个网络设备，以及向邻近信息更新信令传送一个或多个网络设备。
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公开(公告)号：US08862140B2
公开(公告)日：2014-10-14
申请号：US13527451
申请日：2012-06-19
申请人： Varun Khaitan , Mehmet Yavuz
发明人： Varun Khaitan , Mehmet Yavuz
CPC分类号： H04W52/24 , H04W52/16 , H04W52/242 , H04W84/045
摘要： Methods and apparatuses are provided for performing power control for a femto node deployed in a wireless network that include adjusting a transmission parameter of the femto node based on one or more radio frequency (RF) environment parameters. An RF environment parameter can be determined for a femto node related to a location in a coverage area. A different RF environment parameter related to other femto nodes at the location in the coverage area can be received from one or more devices, a network listening module, etc. A transmission parameter of the femto node, such as a transmit power, can be adjusted based on the RF environment parameter and the different RF environment parameter.
摘要翻译： 提供了用于对部署在无线网络中的毫微微节点执行功率控制的方法和装置，其包括基于一个或多个射频（RF）环境参数来调整毫微微节点的传输参数。 可以针对与覆盖区域中的位置有关的毫微微节点来确定RF环境参数。 可以从一个或多个设备，网络监听模块等接收与覆盖区域中的其他毫微微节点相关的不同RF环境参数。可以调整诸如发射功率的毫微微节点的传输参数 基于RF环境参数和不同的RF环境参数。
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