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1. 发明授权

US4606004A Apparatus for reduction of filtration truncation errors 失效
标题翻译：用于减少过滤截断误差的装置
公开(公告)号：US4606004A
公开(公告)日：1986-08-12
申请号：US591730
申请日：1984-03-21
申请人： Carl R. Crawford , Kishore C. Acharya
发明人： Carl R. Crawford , Kishore C. Acharya
IPC分类号： G06F17/10 , G06F17/14 , G06T1/20 , G06T11/00 , G06F15/42
CPC分类号： G06T11/005 , A61B6/5258 , Y10S378/901
摘要： Apparatus for reduction of filtration truncation errors caused by convolving a plurality of input signals, such as line-integral projection data obtained in a computerized tomography (CT) scan of an object, with a common kernel function in a finite precision machine using Fourier transform techniques. The resulting convolved output signals contain correlated noise which, in the case of reconstructed CT images, manifests itself as structured noise in the form of rings and center spots in the image. The correlated noise can be reduced by randomly shifting the data prior to convolving it. The random shift can be achieved by a rotational permutation scheme. Another scheme for shifting the data is to prepend or append zeros to the data by using a random number generator or a deterministic function.
摘要翻译：用于减少由使用傅里叶变换技术的有限精密机器中的公共核心功能卷积多个输入信号（例如在对象的计算机断层摄影（CT）扫描中获得的线积分投影数据）引起的过滤截断错误的装置。所产生的卷积输出信号包含相关噪声，其在重建的CT图像的情况下，以图像中环和中心点的形式表现为结构化噪声。相关噪声可以通过在卷积之前随机移位数据来减少。随机移位可以通过旋转置换方案来实现。用于移动数据的另一种方案是通过使用随机数生成器或确定性函数来将零添加到数据中。

2. 发明授权

US06674834B1 Phantom and method for evaluating calcium scoring 失效
标题翻译：评估钙评分的幽灵和方法
公开(公告)号：US06674834B1
公开(公告)日：2004-01-06
申请号：US09541157
申请日：2000-03-31
申请人： Kishore C. Acharya , Thad A. Heinold
发明人： Kishore C. Acharya , Thad A. Heinold
IPC分类号： A61B600
CPC分类号： A61B6/583 , A61B6/032
摘要： A method is described for evaluating substance scoring, the scoring based on imaging system-generated images of an object having regions of interest due to possible presence of the substance, the method including the steps of simulating the regions of interest using a phantom having a plurality of volumes, each volume having dimensions simulating dimensions of a region of interest, each volume having a density representative of a substance density; generating images of the phantom; scoring the substance based on the phantom images; and comparing results of the substance scoring to expected phantom-image results. The above-described phantom and method allow a scoring system user to verify substance scoring accuracy and to compare scores resulting from different imaging systems, scanning methods and reconstruction algorithms.
摘要翻译：描述了用于评估物质评分的方法，基于由于物质的可能存在而具有感兴趣区域的对象的成像系统产生的图像的评分，该方法包括以下步骤：使用具有多个物体的体模来模拟感兴趣区域的体积，每个体积具有模拟感兴趣区域的尺寸的尺寸，每个体积具有表示物质密度的密度; 生成幻影的图像; 基于幻影图像对该物质进行评分; 并将物质评分的结果与预期幻影图像结果进行比较。上述幻影和方法允许评分系统用户验证物质评分精度，并比较由不同成像系统，扫描方法和重建算法得到的分数。

3. 发明授权

US06697451B2 Dynamic phantom and method for evaluating calcium scoring 失效
标题翻译：动态体模和评估钙评分的方法
公开(公告)号：US06697451B2
公开(公告)日：2004-02-24
申请号：US09946288
申请日：2001-09-05
申请人： Kishore C. Acharya , Marcela A. Gonzalez , Gary J. Walloch
发明人： Kishore C. Acharya , Marcela A. Gonzalez , Gary J. Walloch
IPC分类号： A61B600
CPC分类号： A61B6/583 , A61B6/032 , A61B6/541
摘要： A method of evaluating a substance scoring system comprises acquiring data from a phantom using an imaging system, moving at least a portion of the phantom during the acquiring step, and generating an actual substance score for the phantom based on the data acquired using the imaging system. The phantom simulates a human organ such as a human heart. The phantom is provided with a motion profile that simulates a motion profile of the human organ.
摘要翻译：一种评估物质评分系统的方法包括：使用成像系统从体模获取数据，在获取步骤期间移动至少一部分体模，并且基于使用成像系统获得的数据生成体模的实际物品分数。幻影模拟人体器官如人的心脏。幻影提供有模拟人体器官运动曲线的运动曲线。

4. 发明授权

US4680709A Back projection image reconstruction apparatus and method 失效
标题翻译：背投影图像重建装置及方法
公开(公告)号：US4680709A
公开(公告)日：1987-07-14
申请号：US670595
申请日：1984-11-13
申请人： Nallaswamy Srinivasan , Sharon L. Banaszewski , Kishore C. Acharya
发明人： Nallaswamy Srinivasan , Sharon L. Banaszewski , Kishore C. Acharya
IPC分类号： G01N23/04 , A61B6/03 , G03B42/02 , G06T1/00 , G06T11/00 , G06F15/42 , G06G7/60
CPC分类号： G06T11/005
摘要： Image reconstruction time in a CT scanner is enhanced by using a pipeline structure and interpolation techniques to identify each detector for use in back projection of radiation aborption measurements through each pixel in each view of the scanner. In a preferred embodiment, detectors are identified by calculation for a pixel in every third view with detectors for intermediate views obtained by interpolation of the calculated detectors. Similarly, detectors are identified for every other pixel in a view with the detector for the intermediate pixel identified by interpolation.
摘要翻译：通过使用流水线结构和内插技术来增强CT扫描仪中的图像重建时间，以识别每个检测器用于通过扫描仪每个视图中的每个像素进行辐射吸收测量的反投影。在优选实施例中，通过对每个第三视图中的像素的计算来识别检测器，其中通过对所计算的检测器进行插值而获得的用于中间视图的检测器。类似地，对于通过内插识别的中间像素的检测器，在视图中为每个其他像素识别检测器。

5. 发明授权

US07027855B2 R-peak detection corrections for improved cardiac gated reconstruction 有权
标题翻译：用于改善心脏门控重建的R峰检测校正
公开(公告)号：US07027855B2
公开(公告)日：2006-04-11
申请号：US10064899
申请日：2002-08-27
申请人： Darin Okerlund , Tinsu Pan , Mark E. Woodford , Kishore C. Acharya
发明人： Darin Okerlund , Tinsu Pan , Mark E. Woodford , Kishore C. Acharya
IPC分类号： A61B5/04
CPC分类号： A61B6/541 , A61B5/0456 , A61B6/032
摘要： A method and apparatus for use with a gated CT imaging system for correcting for Rpeak errors in a heart beat signal, the method including identifying heart rate corresponding to each specific heart beating cycle and comparing the heart rate for each specific cycle to moving averages to determine when a likely Rpeak error has occurred and, when a likely error has occurred, modifying the heart beat signal to generate a more accurate signal and thereby render more accurate gated images.
摘要翻译：一种用于门控CT成像系统用于校正心跳信号中的Rpeak误差的方法和装置，所述方法包括识别与每个特定心跳跳动周期相对应的心率，并将每个特定周期的心率与移动平均值进行比较以确定当发生可能的Rpeak错误，并且当发生可能的错误时，修改心跳信号以产生更准确的信号，从而渲染更准确的门控图像。

6. 发明授权

US06639965B1 Methods and apparatus for cardiac imaging with conventional computed tomography 有权
标题翻译：用常规计算机断层扫描进行心脏成像的方法和装置
公开(公告)号：US06639965B1
公开(公告)日：2003-10-28
申请号：US09410157
申请日：1999-09-30
申请人： Jiang Hsieh , Tin-Su Pan , Yun Shen , Steve John Woloschek , Mark E. Woodford , Kishore C. Acharya
发明人： Jiang Hsieh , Tin-Su Pan , Yun Shen , Steve John Woloschek , Mark E. Woodford , Kishore C. Acharya
IPC分类号： A61B600
CPC分类号： A61B6/541 , A61B6/027 , A61B6/032 , A61B6/503
摘要： A method and apparatus for imaging a heart with a scanning computed tomography (CT) imaging system. A cardiac cycle of a patient is measured. The patient's heart is then scanned with the scanning CT imaging system at an angular rate asynchronous to the measured cardiac cycle to obtain image data. An image of the patient's heart is then assembled from chronologically discontinuous segments of the image data. The image is representative of a selected portion of the cardiac cycle.
摘要翻译：一种用扫描计算机断层摄影（CT）成像系统对心脏进行成像的方法和装置。测量患者的心脏周期。然后用扫描CT成像系统以与测量的心动周期异步的角速率扫描患者的心脏，以获得图像数据。然后从图像数据的时间上不连续的部分组装患者心脏的图像。图像代表心脏周期的选定部分。

7. 发明授权

US06307910B1 Methods and apparatus for reduced radiation coronary computed tomography imaging 有权
标题翻译：减少辐射冠状动脉计算机断层扫描成像的方法和装置
公开(公告)号：US06307910B1
公开(公告)日：2001-10-23
申请号：US09479015
申请日：2000-01-07
申请人： Kishore C. Acharya , Jiang Hsieh , Kenneth G. Dunahee , Steven J. Woloschek
发明人： Kishore C. Acharya , Jiang Hsieh , Kenneth G. Dunahee , Steven J. Woloschek
IPC分类号： H61B603
CPC分类号： A61B6/541 , A61B6/032 , G01N23/046 , G01N2223/419 , G01N2223/612 , G06T11/005 , G06T2211/412 , G06T2211/436
摘要： Methods and corresponding apparatus for imaging a portion of a patient's body with a computed tomographic imaging system configured to scan the patient's body at a cyclically varying view angle, in which the imaging system includes a radiation source and detector array providing a fan angle width of image data. In one embodiment, the method includes axially scanning the portion of the patient's body, gating the radiation source on over less than a 360 °view angle cycle of the axial scan, acquiring image data of the portion of the patient's body during at least a portion of the time the radiation source is gated on, and assembling the acquired image data into an image of the portion of the patient's body.
摘要翻译：用于利用计算机断层成像系统对患者身体的一部分进行成像的方法和相应装置，所述计算机断层摄影系统被配置为以循环变化的视角扫描患者身体，其中所述成像系统包括辐射源和提供图像的扇角宽度的检测器阵列数据。在一个实施例中，该方法包括轴向扫描患者身体的部分，在轴向扫描的小于360°的视角周期上选通辐射源，在至少一部分内获取患者身体部分的图像数据放射源被选通的时间，以及将获取的图像数据组装成患者身体的该部分的图像。

8. 发明授权

US4504909A Method of using an array processor for real time processing 失效
标题翻译：使用阵列处理器进行实时处理的方法
公开(公告)号：US4504909A
公开(公告)日：1985-03-12
申请号：US428458
申请日：1982-09-30
申请人： Kishore C. Acharya , Thomas J. Gilbert , Terry R. Griffie
发明人： Kishore C. Acharya , Thomas J. Gilbert , Terry R. Griffie
IPC分类号： G06T11/00 , G01T1/29 , G06F15/52
CPC分类号： G06T11/005 , G06T2211/428 , Y10S378/901
摘要： A procedure for use with a data acquisition system and an array processor for real time processing of the acquired data. Rather than utilize the array processor in its normal mode to process one array before moving on to the next, processing of subportions of a given array is interleaved with inputting of acquired data sets for the next array. The size of the subgroup, the number of data sets in the array, the number of channels to be processed, the nature of the process to be performed and the speed at which it can be performed are balanced in such a way that (a) processing of a subgroup is completed at about the time the next set is ready for input, and (b) at the completion of processing of the last subgroup within a given array, the last set of the next array is ready for input, so that processing of the next array commences immediately.
摘要翻译：与数据采集系统和阵列处理器一起使用以便对所获取的数据进行实时处理的程序。不是在其正常模式下利用阵列处理器在移动到下一个阵列之前处理一个阵列，而是对于给定阵列的子部分的处理与下一个阵列的所获取的数据集的输入进行交织。子组的大小，阵列中的数据集的数量，待处理的信道的数量，要执行的进程的性质以及可以执行的速度的平衡如下：（a）子组的处理在下一个集合准备好输入的时间完成，（b）在给定数组内的最后一个子组的处理完成时，下一个数组的最后一组准备好输入，以便下一个阵列的处理立即开始。

9. 发明授权

US06470208B1 Method and apparatus for controlling x-ray exposure during gated cardiac scanning 有权
标题翻译：门控心脏扫描期间控制x射线暴露的方法和装置
公开(公告)号：US06470208B1
公开(公告)日：2002-10-22
申请号：US09474962
申请日：1999-12-30
申请人： Mark E. Woodford , Kishore C. Acharya , Steven J. Woloschek
发明人： Mark E. Woodford , Kishore C. Acharya , Steven J. Woloschek
IPC分类号： A61B500
CPC分类号： A61B6/541
摘要： A method is described for controlling x-ray exposure during gated cardiac scanning, including the steps of detecting a first cardiac signal; starting scanning after a pre-selected wait time after detecting the first cardiac signal; and stopping the scanning after a first to occur of passage of a pre-selected data collection time and detection of a second cardiac signal.
摘要翻译：描述了一种用于控制门控心脏扫描期间的X射线曝光的方法，包括检测第一心脏信号的步骤; 在检测到第一心脏信号之后，在预先选择的等待时间之后开始扫描; 以及在预先选择的数据收集时间的通过的第一次发生和第二心脏信号的检测之后停止扫描。

10. 发明授权

US06408043B1 Volumetric computed tomography system for cardiac imaging including a system for communicating data over a network 失效
标题翻译：用于心脏成像的体积计算机断层摄影系统，包括用于通过网络传送数据的系统
公开(公告)号：US06408043B1
公开(公告)日：2002-06-18
申请号：US09473247
申请日：1999-12-27
申请人： Hui Hu , Jiang Hsieh , Stanley H. Fox , Kishore C. Acharya , Hui David He , Yi Sun
发明人： Hui Hu , Jiang Hsieh , Stanley H. Fox , Kishore C. Acharya , Hui David He , Yi Sun
IPC分类号： A61B600
CPC分类号： A61B6/541 , A61B6/027 , G01N23/046 , G01N2223/419 , G01N2223/612
摘要： A method for generating an image of an object using a computed tomography (CT) imaging system, which includes at least one x-ray detector array and at least one rotating x-ray source projecting an x-ray beam, includes the steps of identifying a physiological cycle of the object (the cycle comprising a plurality of phases); selecting at least one phase of the object; collecting at least one segment of projection data for each selected phase of the object during each rotation of each x-ray source; generating a projection data set by combining the projection data segments; generating a cross-sectional image of the entire object from the projection data set; and communicating the image or data associated with the image to a remote facility. The remote facility provides remote services over a network.
摘要翻译：一种使用计算机断层摄影（CT）成像系统产生物体的图像的方法，该系统包括至少一个X射线检测器阵列和投射X射线束的至少一个旋转x射线源，包括识别物体的生理周期（包括多个相的周期）; 选择对象的至少一个阶段; 在每个x射线源的每次旋转期间收集对象的每个所选相位的至少一个投影数据段; 通过组合所述投影数据段来生成投影数据集; 从所述投影数据集生成整个对象的横截面图像; 并将与图像相关联的图像或数据传送到远程设施。远程设备通过网络提供远程服务。

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