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81. 发明授权

US5727041A Methods and apparatus for reducing partial volume image artifacts 失效
标题翻译：减少部分体积图像伪影的方法和装置
公开(公告)号：US5727041A
公开(公告)日：1998-03-10
申请号：US747639
申请日：1996-11-13
申请人： Jiang Hsieh
发明人： Jiang Hsieh
IPC分类号： A61B6/03 , G06T1/00
CPC分类号： A61B6/032 , Y10S378/901
摘要： The present invention, in one form, is a method for improving image quality in Computed Tomography systems by using a partial volume artifact estimation algorithm. In accordance with one embodiment of the algorithm, an object of interest is scanned to generate image data. The image data is segmented into low attenuation data and high attenuation data. A gradient image is generated for two adjacent slices of the image data. The gradient image is then forward projected and squared. The squared gradient image is an estimation of partial volume artifacts in the image data, and therefore is removed from the image data.
摘要翻译：本发明以一种形式，是通过使用部分体积假象估计算法来提高计算机断层成像系统中的图像质量的方法。根据算法的一个实施例，扫描感兴趣的对象以生成图像数据。图像数据被分割成低衰减数据和高衰减数据。为图像数据的两个相邻切片生成渐变图像。然后梯度图像向前投影和平方。平方梯度图像是对图像数据中的部分体积伪像的估计，因此从图像数据中去除。

82. 发明授权

US5550889A Alignment of an x-ray tube focal spot using a deflection coil 失效
标题翻译：使用偏转线圈对x射线管焦点进行对准
公开(公告)号：US5550889A
公开(公告)日：1996-08-27
申请号：US345082
申请日：1994-11-28
申请人： Michael F. Gard , Stephen W. Gravelle , Jiang Hsieh , Quan N. Lu , John W. Newman , Thomas L. Toth , Michael A. Wu
发明人： Michael F. Gard , Stephen W. Gravelle , Jiang Hsieh , Quan N. Lu , John W. Newman , Thomas L. Toth , Michael A. Wu
IPC分类号： H01J35/14 , H01J35/26 , H01J35/30 , H05G1/26 , H05G1/52
CPC分类号： H05G1/52 , H01J35/14 , H01J35/26 , H01J35/30 , H05G1/26
摘要： Precise alignment of the focal spot position on an x-ray CT system is achieved using a deflection coil that produces a magnetic field which acts on the electron beam path in the x-ray tube. A variable current power supply drives the deflection coil and is controlled by input signals to align the focal spot at a static reference position, to correct for focal spot drift between scans, and to wobble the focal spot position during a scan or between scans.
摘要翻译：使用偏转线圈实现x射线CT系统上的焦点位置的精确对准，该偏转线圈产生作用在x射线管中的电子束路径上的磁场。可变电流电源驱动偏转线圈并由输入信号控制，以将焦点对准静态参考位置，以校正扫描之间的焦斑漂移，并在扫描期间或扫描之间摆动焦点位置。

83. 发明授权

US5416815A Adaptive filter for reducing streaking artifacts in x-ray tomographic images 失效
标题翻译：自适应滤波器，用于减少X射线断层图像中的条纹伪像
公开(公告)号：US5416815A
公开(公告)日：1995-05-16
申请号：US87568
申请日：1993-07-02
申请人： Jiang Hsieh
发明人： Jiang Hsieh
IPC分类号： A61B6/03 , G01N23/04 , G01N23/083
CPC分类号： G01N23/046 , G01N2223/419 , Y10S378/901
摘要： Streaking artifacts in a computed tomography x-ray image are reduced by adaptively filtering each set of projection data. The adaptive filter produces an error vector (.theta.) by low-pass filtering the projection data (P) and subtracting the error vector (.theta.) from the projection data (P) prior to image reconstruction. A window function generator controls the low-pass filter as a function of x-ray detector readings.
摘要翻译：通过对每组投影数据进行自适应滤波，减少计算机断层摄影X射线图像中的伪像。自适应滤波器通过对投影数据（P）进行低通滤波并在图像重建之前从投影数据（P）中减去误差向量（θ）来产生误差向量（θ）。窗口函数发生器控制低通滤波器作为x射线探测器读数的函数。

84. 发明授权

US08548568B2 Methods and apparatus for motion compensation 有权
标题翻译：运动补偿方法和装置
公开(公告)号：US08548568B2
公开(公告)日：2013-10-01
申请号：US11517964
申请日：2006-09-08
申请人： Jiang Hsieh
发明人： Jiang Hsieh
IPC分类号： A61B5/05
CPC分类号： G06T11/005 , A61B6/503 , A61B6/5247 , A61B6/5264 , A61B8/0883 , A61B8/5276 , G06T2211/412
摘要： A method includes fitting a motion map from a first imaging modality with a first FOV to a second imaging modality different from the first with a second FOV sized differently than the first FOV.
摘要翻译：一种方法包括将来自具有第一FOV的第一成像模态的运动图拟合成与第一成像模态不同于具有不同于第一FOV的第二FOV的第一成像模态。

85. 发明授权

US08363779B2 System and method of acquiring multi-energy CT imaging data 有权
标题翻译：获取多能CT成像数据的系统和方法
公开(公告)号：US08363779B2
公开(公告)日：2013-01-29
申请号：US13484707
申请日：2012-05-31
申请人： Naveen Chandra , Xiaoye Wu , Thomas L. Toth , Jiang Hsieh
发明人： Naveen Chandra , Xiaoye Wu , Thomas L. Toth , Jiang Hsieh
IPC分类号： A61B6/00 , H05G1/64 , G06K9/00
CPC分类号： A61B6/4035 , A61B6/032 , A61B6/4007 , A61B6/405 , A61B6/4241 , A61B6/482
摘要： A CT system includes a rotatable gantry having an opening for receiving an object to be scanned, and a controller. The controller is configured to apply a first kVp for a first time period, apply a second kVp for a second time period, integrate two or more view datasets during the first time period, integrate one or more view datasets during the second time period, and generate an image using the datasets integrated during the first time period and during the second time period.
摘要翻译： CT系统包括具有用于接收待扫描物体的开口的可旋转机架和控制器。控制器被配置为在第一时间段内施加第一kVp，在第二时间段施加第二kVp，在第一时间段期间集成两个或更多个视图数据集，在第二时间段期间集成一个或多个视图数据集;以及使用在第一时间段期间和第二时间段期间集成的数据集生成图像。

86. 发明申请

US20120069952A1 SYSTEM AND METHOD OF SPECTRAL CALIBRATION AND BASIS MATERIAL DECOMPOSITION FOR X-RAY CT SYSTEMS 有权
标题翻译： X射线CT系统的光谱校准和基础材料分解系统与方法
公开(公告)号：US20120069952A1
公开(公告)日：2012-03-22
申请号：US12883631
申请日：2010-09-16
申请人： Xiaoye Wu , Dan Xu , Naveen Chandra , Zhanyu Ge , Jiang Hsieh , Daniel David Harrison , Mary Sue Kulpins
发明人： Xiaoye Wu , Dan Xu , Naveen Chandra , Zhanyu Ge , Jiang Hsieh , Daniel David Harrison , Mary Sue Kulpins
IPC分类号： A61B6/03
CPC分类号： A61B6/583 , A61B6/032 , A61B6/482 , A61B6/585
摘要： An imaging system includes an x-ray source that emits a beam of x-rays toward an object, a detector that receives high frequency electromagnetic energy attenuated by the object, a data acquisition system (DAS) operably connected to the detector, and a computer operably connected to the DAS. The computer is programmed to compute detector coefficients based on a static low kVp measurement and a static high kVp measurement, capture incident spectra at high and low kVp during fast kVp switching, compute effective X-ray incident spectra at high and low kVp during fast kVp switching using the captured incident spectra, scan a water phantom and normalize the computed detector coefficients to water, adjust the computed effective X-ray incident spectra based on the normalized detector coefficients, compute basis material decomposition functions using the adjusted X-ray incident spectra, and generate one or more basis material density images using the computed basis material decomposition functions.
摘要翻译：成像系统包括：x射线源，其朝向物体发射X射线束;接收被物体衰减的高频电磁能的检测器;可操作地连接到检测器的数据采集系统（DAS）;以及计算机可操作地连接到DAS。计算机被编程为基于静态低kVp测量和静态高kVp测量来计算检测器系数，在快速kVp切换期间在高和低kVp处捕获入射光谱，在快速kVp期间计算高和低kVp处的有效X射线入射光谱使用捕获的入射光谱切换，扫描水体模型并将计算的检测器系数归一化为水，基于归一化的检测器系数调整计算的有效X射线入射光谱，使用调整的X射线入射光谱计算基础材料分解函数，并使用所计算的基础材料分解函数生成一个或多个基础材料密度图像。

87. 发明授权

US08031828B1 Method and apparatus for computed tomography 有权
标题翻译：计算机断层扫描的方法和装置
公开(公告)号：US08031828B1
公开(公告)日：2011-10-04
申请号：US12771875
申请日：2010-04-30
申请人： Bruno Kristiaan Bernard DeMan , Jiang Hsieh , Jed Douglas Pack , Kai Zeng
发明人： Bruno Kristiaan Bernard DeMan , Jiang Hsieh , Jed Douglas Pack , Kai Zeng
IPC分类号： A61B6/00
CPC分类号： G06T11/005 , A61B6/027 , G06F19/00 , G06T2211/432
摘要： In one embodiment, a first set of projection data is acquired using a first portion of a detector and a second set of projection data is acquired using a second portion of the detector. The second set of projection data is supplemented based upon the first set of projection data to generate a supplemented set of projection data. A volumetric image may be generated using the supplemented set of projection data.
摘要翻译：在一个实施例中，使用检测器的第一部分获取第一组投影数据，并且使用检测器的第二部分获取第二组投影数据。基于第一组投影数据补充第二组投影数据，以生成补充的一组投影数据。可以使用补充的投影数据集生成体积图像。

88. 发明授权

US07983462B2 Methods and systems for improving quality of an image 有权
标题翻译：提高图像质量的方法和系统
公开(公告)号：US07983462B2
公开(公告)日：2011-07-19
申请号：US11284448
申请日：2005-11-22
申请人： Ken David Sauer , Charles Addison Bouman , Jiang Hsieh , Jean-Baptiste Thibault
发明人： Ken David Sauer , Charles Addison Bouman , Jiang Hsieh , Jean-Baptiste Thibault
IPC分类号： G06K9/00 , A61B8/00
CPC分类号： G06T5/50 , A61B6/032 , A61B6/4085 , G06T7/11 , G06T2207/10081 , G06T2207/20012 , G06T2207/20221 , G06T2207/30004
摘要： A method for improving quality of an image is described. The method includes reconstructing a first image of a sample volume, segmenting the first image to generate a first region and a second region, reconstructing a second image of the sample volume, and generating a final image from a combination of the segmentation, the first image, and the second image.
摘要翻译：描述了一种用于提高图像质量的方法。该方法包括重建样本体积的第一图像，分割第一图像以生成第一区域和第二区域，重建样本体积的第二图像，以及从分割的组合生成最终图像，第一图像，和第二个图像。

89. 发明申请

US20110150175A1 APPARATUS AND METHOD FOR SPECTRAL PROJECTION IMAGING WITH FAST KV SWITCHING 有权
标题翻译：用快速KV切换进行光谱投影成像的装置和方法
公开(公告)号：US20110150175A1
公开(公告)日：2011-06-23
申请号：US12642945
申请日：2009-12-21
申请人： Jiang Hsieh , Naveen Chandra , Steven J. Woloschek , Robert F. Senzig
发明人： Jiang Hsieh , Naveen Chandra , Steven J. Woloschek , Robert F. Senzig
IPC分类号： H05G1/60 , G06K9/00
CPC分类号： A61B6/482 , A61B6/4021 , A61B6/4266 , A61B6/488 , G01T1/2985
摘要： A CT system includes a gantry, an x-ray source configured to project x-rays toward an object, an x-ray detector positioned to receive x-rays from the x-ray source that pass through the object, a generator configured to energize the x-ray source to a first voltage and to a second voltage that is distinct from the first voltage, and a controller configured to cause the gantry to position the source and generator at a circumferential position during an imaging session, pass the object through the opening during the imaging session, cause the generator to energize the x-ray source to the first voltage and to the second voltage, acquire imaging data while the generator energizes the x-ray source to the first voltage and to the second voltage while the rotatable gantry is at the circumferential position, and generate an image using the imaging data.
摘要翻译：一个CT系统包括一个配置成将x射线投射到物体的台架，x射线源，x射线探测器，其被定位成从X射线源接收穿过物体的x射线， x射线源到第一电压和不同于第一电压的第二电压;以及控制器，其被配置为使得台架在成像会话期间将源和发生器定位在圆周位置，使物体通过在成像会话期间打开，使得发生器将x射线源激励到第一电压和第二电压，获取成像数据，同时发生器将X射线源激励到第一电压和第二电压，同时可旋转龙门架处于圆周位置，并使用成像数据生成图像。

90. 发明申请

US20110116700A1 ADAPTIVE GRADIENT WEIGHTING TECHNIQUE FOR DETECTOR BAD CELL CORRECTION 有权
标题翻译：用于检测器BAD细胞校正的自适应梯度称重技术
公开(公告)号：US20110116700A1
公开(公告)日：2011-05-19
申请号：US13009584
申请日：2011-01-19
申请人： Baojun Li , Jiang Hsieh
发明人： Baojun Li , Jiang Hsieh
IPC分类号： G06K9/00 , G06F19/00
CPC分类号： G01T1/2985
摘要： An imaging system includes a two-dimensional detector having a plurality of cells wherein each cell is configured to detect energy or signal passing through an object. The imaging system includes a computer programmed to acquire imaging data for the plurality of cells, identify a cell to be corrected, based on the imaging data, interpolate Ix and Iy for the identified cell based on neighbor cells, and calculate local gradients gx and gy between the identified cell and its neighbor cells based on the interpolation. The computer is further programmed to calculate weighting factors wx and wy based on the local gradients, calculate a corrected final value I(0,0) for the identified cell, and correct the identified cell with the corrected final value.
摘要翻译：成像系统包括具有多个单元的二维检测器，其中每个单元被配置为检测通过物体的能量或信号。成像系统包括被编程为采集多个单元的成像数据的计算机，基于成像数据识别要校正的单元，基于相邻单元对所识别的单元插值Ix和Iy，并计算局部梯度gx和gy 基于内插，在所识别的小区及其相邻小区之间。计算机还被编程为基于局部梯度计算加权因子wx和wy，计算所识别的单元的校正后的最终值I（0,0），并用校正的最终值校正所识别的单元。

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