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公开(公告)号：US06370227B1
公开(公告)日：2002-04-09
申请号：US09706247
申请日：2000-11-06
IPC分类号： G21K102
摘要： A collimator 100 for use in a radiation imaging system 10, and a method for making such collimators, are provided, wherein the collimator 100 is capable of collimating radiation in two orthogonal planes. The collimator in one embodiment includes a block 101 of radiation absorbing material having a plurality of focally aligned channels 102 extending therethrough; in a second embodiment, the collimator includes first and second collimation 204, 212 sections having a respective first plurality of focally aligned plate sets 201 and a respective second plurality of focally aligned plate sets 203 disposed orthogonally to the first plurality of plate sets. The method for making the collimator includes generating a CAD drawing, generating from the CAD drawing one or more stereo-lithographic files, and using the stereo-lithographic files to control an electro-deposition machining machine which creates the channels in the block.
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32.发明授权Method and apparatus for predicting x-ray tube failures in computed tomography systems 失效用于预测计算机断层摄影系统中X射线管故障的方法和装置公开(公告)号：US06351517B1
公开(公告)日：2002-02-26
申请号：US09575699
申请日：2000-07-07
IPC分类号： H05G108
摘要： In predicting failure of an x-ray tube in a computed tomography (CT) system, reference detector elements normally disposed on each end of the detector, receive x-rays directly from the x-ray tube. In accordance with the invention, the output values of the reference detector elements are utilized by a tube condition prediction algorithm to predict a failure in the x-ray tube of the CT system. The tube condition prediction algorithm utilizes at least one model of the CT system and at least one prediction routine, which typically is a Kalman filter, to generate the prediction. The prediction routine uses the model to analyze the output values of the reference detector elements in order to determine the condition of the x-ray tube and predict future performance of the x-ray tube.
摘要翻译： 在计算机断层摄影（CT）系统中预测X射线管的故障时，通常设置在检测器每端的参考探测器元件直接从X射线管接收X射线。 根据本发明，通过管状态预测算法利用参考检测器元件的输出值来预测CT系统的X射线管的故障。 管条件预测算法利用至少一个CT系统模型和通常是卡尔曼滤波器的至少一个预测程序来产生预测。 预测程序使用该模型来分析参考检测器元件的输出值，以便确定x射线管的状况并预测x射线管的未来性能。
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33.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：US08861681B2
公开(公告)日：2014-10-14
申请号：US12972156
申请日：2010-12-17
CPC分类号： H02M7/10 , H02M3/337 , H02M2001/0058 , H05G1/10 , Y02B70/1433 , Y02B70/1491
摘要： Methods and systems for active resonant voltage switching are provided. One active resonant switching system includes a voltage switching system having one or more active resonant modules to provide a switching voltage output. Each of the resonant modules includes a plurality of switching devices configured to operate in open and closed states to produce first and second voltage level outputs from a voltage input. The resonant modules also include a capacitor connected to the switching devices and configured to receive a discharge energy during a resonant operating cycle when switching an output voltage from the first voltage level to the second voltage level, wherein the capacitor is further configured to restore system energy when switching from the second to first voltage level. The resonant modules further include a resonant inductor configured to transfer energy to and from the capacitor.
摘要翻译： 提供了主动谐振电压切换的方法和系统。 一个有源谐振开关系统包括具有一个或多个有源谐振模块以提供开关电压输出的电压切换系统。 每个谐振模块包括多个开关装置，其被配置为在打开和关闭状态下操作以从电压输入产生第一和第二电压电平输出。 谐振模块还包括连接到开关装置的电容器，并且被配置为在将输出电压从第一电压电平切换到第二电压电平时在谐振操作周期期间接收放电能量，其中电容器还被配置为恢复系统能量 当从第二电压电平切换到第一电压电平时。 谐振模块还包括被配置为将能量传递到电容器和从电容器传输能量的谐振电感器。
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35.发明申请公开(公告)号：US20120314928A1
公开(公告)日：2012-12-13
申请号：US13593156
申请日：2012-08-23
申请人： Jiang Hsieh , Roy-Arnulf Helge Nilsen , Peter Michael Edic , Bruno Kristiaan Bernard De Man , Jean-Baptiste Thibault , Baojun Li , John Lawrence Seamans
发明人： Jiang Hsieh , Roy-Arnulf Helge Nilsen , Peter Michael Edic , Bruno Kristiaan Bernard De Man , Jean-Baptiste Thibault , Baojun Li , John Lawrence Seamans
IPC分类号： G06K9/46
CPC分类号： A61B6/032 , A61B6/482 , A61B6/503 , G06T11/006 , G06T2211/412 , G06T2211/424
摘要： A system, method, and apparatus includes a computed tomography (CT) system having a rotatable gantry, an x-ray source, a generator, a detector having pixels and positioned to receive x-rays, and a computer. The computer is programmed to acquire CT data representative of an object, determine a first subset of the CT data, determine a second subset of the CT data, and determine a difference between the first and second subsets of the CT data to identify a motion region in the object. The computer is also programmed to update image data reconstructed from a first portion of the first subset of the CT data and corresponding to the region and reconstruct an image based on the updated image data and non-updated image data. The non-updated image data is reconstructed from a second portion the first subset of the CT data.
摘要翻译： 系统，方法和装置包括具有可旋转机架，X射线源，发生器，具有像素并被定位成接收x射线的检测器的计算机断层摄影（CT）系统和计算机。 计算机被编程为获取表示对象的CT数据，确定CT数据的第一子集，确定CT数据的第二子集，并且确定CT数据的第一和第二子集之间的差异，以识别运动区域 在对象中。 计算机还被编程为更新从CT数据的第一子集的第一部分重建并对应于该区域的图像数据，并且基于更新的图像数据和未更新的图像数据重建图像。 从CT数据的第一子集的第二部分重构未更新的图像数据。
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公开(公告)号：US08224056B2
公开(公告)日：2012-07-17
申请号：US12638693
申请日：2009-12-15
申请人： Jed Douglas Pack , Peter Michael Edic , Bernhard Erich Hermann Claus , Maria Iatrou , James Vradenburg Miller
发明人： Jed Douglas Pack , Peter Michael Edic , Bernhard Erich Hermann Claus , Maria Iatrou , James Vradenburg Miller
IPC分类号： G06K9/00
CPC分类号： G06T11/005 , G06T7/11 , G06T7/174 , G06T7/246 , G06T2207/10081 , G06T2207/30048 , G06T2207/30101 , G06T2207/30172 , G06T2211/412
摘要： A method and system for motion estimation and compensation are disclosed. Initially, a set of one or more initial images is reconstructed using acquired imaging data. Further, one or more regions of interest are identified in this set of reconstructed initial images. At least a set of filters is applied to the identified regions of interest to generate a sequence of filtered images. Particularly, each of the filtered images in the generated sequence of filtered images includes data acquired near a different reference point. Subsequently, a motion path corresponding to each region of interest is determined based on one or more correspondences in the sequence of filtered images.
摘要翻译： 公开了一种用于运动估计和补偿的方法和系统。 最初，使用获取的成像数据重建一组一个或多个初始图像。 此外，在该组重建的初始图像中识别一个或多个感兴趣区域。 至少一组滤波器被应用于所识别的感兴趣区域以产生滤波图像序列。 特别地，所生成的滤波图像序列中的每个滤波图像包括在不同参考点附近获取的数据。 随后，基于滤波图像的序列中的一个或多个对应来确定对应于每个感兴趣区域的运动路径。
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公开(公告)号：US08139717B2
公开(公告)日：2012-03-20
申请号：US12572938
申请日：2009-10-02
IPC分类号： G21K1/02
CPC分类号： G21K1/025
摘要： A method for making a secondary collimator that includes at least one plate having a plurality of slits defined therein includes determining a gap thickness between plate positions of the secondary collimator based on at least one dimension of the at least one plate and fabricating a base plate from a base plate blank. The base plate includes at least two slots being spaced apart by the gap thickness. The at least one plate is inserted into a first slot of the at least two slots to form the secondary collimator.
摘要翻译： 一种用于制造二次准直器的方法，包括至少一个具有限定在其中的多个狭缝的板，包括：根据至少一个板的至少一个尺寸确定次准准器的板位置之间的间隙厚度，并从 底板坯。 基板包括至少两个狭槽间隔开的间隙厚度。 将至少一个板插入至少两个槽的第一槽中以形成次准准器。
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公开(公告)号：US07885372B2
公开(公告)日：2011-02-08
申请号：US11952494
申请日：2007-12-07
CPC分类号： G01N23/046 , A61B6/032 , A61B6/4035 , A61B6/4042 , A61B6/4241 , A61B6/482 , G01N2223/419
摘要： An energy-sensitive computed tomography system is provided. The energy-sensitive computed tomography system includes an X-ray source configured to emit an X-ray beam resulting from electrons impinging upon a target material. The energy-sensitive computed tomography system also includes an object positioned within the X-ray beam. The energy-sensitive computed tomography system further includes a detector configured to receive a transmitted beam of the X-rays through the object. The energy-sensitive computed tomography system also includes a filter having an alternating pattern disposed between the X-ray source and the detector, the filter configured to facilitate measuring projection data that can be used to generate low-energy and high-energy spectral information.
摘要翻译： 提供了一种能量敏感的计算机断层摄影系统。 能量敏感的计算机断层摄影系统包括被配置为发射由撞击在目标材料上的电子产生的X射线束的X射线源。 能量敏感的计算机断层摄影系统还包括位于X射线束内的物体。 能量敏感的计算机断层摄影系统还包括检测器，其被配置为接收通过物体的X射线的透射束。 能量敏感的计算机断层摄影系统还包括具有设置在X射线源和检测器之间的交替图案的滤光器，滤光器被配置为便于测量可用于产生低能量和高能量光谱信息的投影数据。
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公开(公告)号：US07844030B2
公开(公告)日：2010-11-30
申请号：US12264428
申请日：2008-11-04
申请人： Colin R. Wilson , Antonio Caiafa , John Charles Hill , Samit Kumar Basu , Pierfrancesco Landolfi , Peter Michael Edic
发明人： Colin R. Wilson , Antonio Caiafa , John Charles Hill , Samit Kumar Basu , Pierfrancesco Landolfi , Peter Michael Edic
摘要： A system includes a generator configured to output at least one voltage level and an x-ray source configured to generate x-rays directed toward an object. The system includes a module coupled to the output of the generator and to an input of the x-ray source and configured to switch or assist in switching an output to the x-ray source between a first voltage level and a second voltage level.
摘要翻译： 系统包括被配置为输出至少一个电压电平的发生器和被配置为产生朝向对象的x射线的x射线源。 该系统包括耦合到发生器的输出和x射线源的输入的模块，并被配置为在第一电压电平和第二电压电平之间切换或辅助将输出切换到X射线源。
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公开(公告)号：US20100277312A1
公开(公告)日：2010-11-04
申请号：US12032116
申请日：2008-02-15
申请人： Peter Michael Edic , Mark E. Vermilyea , John Eric Tkaczyk , Pierfrancesco Landolfi , Geoffrey Harding , Sondre Skatter , Matthew Allen Merzbacher , Helmut Rudolf Strecker , Cameron John Ritchie
发明人： Peter Michael Edic , Mark E. Vermilyea , John Eric Tkaczyk , Pierfrancesco Landolfi , Geoffrey Harding , Sondre Skatter , Matthew Allen Merzbacher , Helmut Rudolf Strecker , Cameron John Ritchie
CPC分类号： G01V5/0025 , G01V5/005
摘要： A contraband detection system includes a first contraband detection apparatus designed to perform a first scan on an object and a second contraband detection apparatus positioned in-line with the first contraband detection apparatus to perform a second scan on the object. A computer is included in the contraband detection system and is programmed to cause the first contraband detection apparatus to perform the first scan and acquire object data therefrom. The computer is further programmed to identify one or more regions of interest (ROI) in the object based on the object data, cause the second contraband detection apparatus to perform the second scan on the one or more identified ROIs, and acquire object data from the second scan.
摘要翻译： 违禁检测系统包括设计成对物体进行第一次扫描的第一违禁检测装置和与第一违禁检测装置成对准的第二违禁检测装置，以对物体执行第二次扫描。 计算机被包括在违禁品检测系统中，并且被编程为使得第一违禁检测装置执行第一扫描并从其获取对象数据。 计算机还被编程为基于对象数据来识别对象中的一个或多个感兴趣区域（ROI），使得第二违禁检测设备对一个或多个所识别的ROI执行第二次扫描，并从 第二次扫描
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