公开(公告)号：US20150069257A1

公开(公告)日：2015-03-12

申请号：US14387279

申请日：2012-03-30

申请人： Guy M. Besson

发明人： Guy M. Besson

IPC分类号： G01T1/17

CPC分类号： G01T1/17 ,  A61B6/03 ,  A61B6/032 ,  A61B6/037 ,  A61B6/463 ,  A61B6/465 ,  A61B6/469 ,  G01T1/1647 ,  G06T3/40 ,  G06T11/003 ,  G06T11/005

摘要： Among other things, one or more techniques and/or systems are described for presenting images derived from a photon counting imaging modality. Initially, a first image is derived by binning native projection data in a first manner to create first binned data and generating the first image using the first binned data. A region-of-interest within the object may be identified from the first image, and, based upon the identified region-of-interest, the native projection data may be rebinned in a second, different, manner to create second binned data. Because the second manner of binning the native projection data is different than the first manner, an image resulting from the second binned data may be different than the first image. Moreover, a user interface may be provided for assisting a user in selecting a region-of-interest and/or for specifying desired properties of the second image.

摘要翻译： 除其他之外，描述了一种或多种技术和/或系统用于呈现从光子计数成像模式导出的图像。 最初，通过以第一种方式对本机投影数据进行合并而得到第一图像，以便创建第一个收货数据，并使用第一个合并数据生成第一个图像。 可以从第一图像识别对象内的感兴趣区域，并且基于所识别的感兴趣区域，可以以第二，不同的方式重新组合本机投影数据，以创建第二合并数据。 因为本机投影数据的第二种合并方式与第一种方式不同，所以从第二收货数据得到的图像可能不同于第一图像。 此外，可以提供用户界面来帮助用户选择兴趣区域和/或用于指定第二图像的期望属性。

公开(公告)号：US08781062B2

公开(公告)日：2014-07-15

申请号：US13533080

申请日：2012-06-26

申请人： Guy M. Besson

发明人： Guy M. Besson

IPC分类号： G01N23/04

CPC分类号： G01N23/04

摘要： Among other things, one or more techniques and/or systems are described for dynamically adjusting one or more X-ray acquisition parameters of an X-ray imaging modality. During a first portion of an examination of an object, the object is examined using a first set of X-ray acquisition parameters and a first image is generated. A region-of-interest is identified in the first image and one or more X-ray acquisition parameters are adjusted as a function of the identified region-of-interest to establish a second set of X-ray acquisition parameters. During a second portion of the examination of the object, the object is examined using the second set of X-ray acquisition parameters to generate a second image. In this way, X-ray acquisition parameters can be adjusted in real-time or ‘on the fly’ to obtain a (more) desired image.

摘要翻译： 其中，描述了一个或多个技术和/或系统用于动态地调整X射线成像模态的一个或多个X射线获取参数。 在对象的检查的第一部分期间，使用第一组X射线获取参数来检查对象，并且生成第一图像。 在第一图像中识别感兴趣区域，并且根据所识别的感兴趣区域来调整一个或多个X射线获取参数以建立第二组X射线获取参数。 在对象的检查的第二部分期间，使用第二组X射线获取参数来检查对象以产生第二图像。 以这种方式，可以实时或“即时”地调整X射线获取参数以获得（更多）期望的图像。

公开(公告)号：US07564938B2

公开(公告)日：2009-07-21

申请号：US10552934

申请日：2004-04-12

申请人： Mike Tesic ,  Guy M. Besson ,  Morgan W. Nields

发明人： Mike Tesic ,  Guy M. Besson ,  Morgan W. Nields

IPC分类号： G01N23/00 ,  G01N23/201 ,  A61B6/04

CPC分类号： A61B5/1075 ,  A61B6/0414 ,  A61B6/06 ,  A61B6/4291 ,  A61B6/502 ,  A61B6/5282 ,  A61B6/544 ,  G06T5/004

摘要： Scatter effects are reduced in a radiographic imaging device, such as a digital slot scan mammographic imaging device, by reducing detected scatter and processing detector information to compensate for scatter effects. In one embodiment, a digital mammographic imaging system (10) includes a source (24) for transmitting a narrow beam (28) and a detector assembly (32) for detecting the beam (28). The beam (28) and the detector assembly (32) are synchronously scanned across the patient's breast (48) to obtain an image. Collimator slats (74) are provided at the leading and trailing edges of the detector to reduce detected scatter. Additionally, attenuators (76 and 92) are provided at the ends of the scanned motion and at the anterior edge of the detector array to assist in determining a spatial intensity profile. The spatial intensity profile information together with other imaging signal and patient dependent parameters are used in image processing to estimate and compensate for various scatter effects including single and multiple scatters and Compton and Rayleigh scatter.

摘要翻译： 通过减少检测到的散射和处理检测器信息来补偿散射效应，放射线照相成像装置（例如数字缝隙扫描乳腺摄影成像装置）中的散射效应降低。 在一个实施例中，数字乳腺成像系统（10）包括用于传输窄梁（28）的源（24）和用于检测梁（28）的检测器组件（32）。 梁（28）和检测器组件（32）被同步扫描穿过患者的乳房（48）以获得图像。 准直板条（74）设置在检测器的前缘和后缘，以减少检测到的散射。 此外，衰减器（76和92）设置在扫描的运动的端部和检测器阵列的前边缘处，以帮助确定空间强度分布。 在图像处理中使用空间强度分布信息以及其他成像信号和患者依赖参数来估计和补偿包括单次和多次散射以及康普顿和瑞利散射的各种散射效应。

公开(公告)号：US07342993B2

公开(公告)日：2008-03-11

申请号：US11351446

申请日：2006-02-10

申请人： Guy M. Besson

发明人： Guy M. Besson

IPC分类号： G01N23/00 ,  G21K5/10

CPC分类号： A61B6/487 ,  A61B5/06 ,  A61B6/025 ,  A61B6/06 ,  A61B6/12 ,  A61B6/4233 ,  A61B6/4291 ,  A61B6/488 ,  A61B6/5235 ,  A61B6/541 ,  A61B6/56 ,  A61B6/587

摘要： A system for low dose x-ray imaging provides for dynamic generation of an x-ray beam with specific shape, and dynamic tracking of a detector with said beam. The detector is rotatable, and translatable along two orthogonal axes, and may mount with a circular detector tray, the tray rotating around a rotation axis. Specific detector shapes include an elongated rectangular matrix, for example with additional detector cells near the rotation center to provide an increased area of continuous detection. Dynamic low-dose x-ray tomosynthesis or limited-angle tomographic imaging is enabled via simultaneous x-ray tube and detector motions during examination, such as fluoroscopic examination of a human body. Data acquired at multiple projection angles is input to a 3D image reconstruction algorithm that provides a refreshed 3D data set during continuing examination. The system may thus also automatically track a point in three-dimensional space, for example continuously locating the tip of a catheter.

摘要翻译： 用于低剂量x射线成像的系统提供具有特定形状的x射线束的动态生成以及具有所述束的检测器的动态跟踪。 检测器是可旋转的，并可沿着两个正交的轴线平移，并且可以用圆形检测器托盘安装，托盘围绕旋转轴线旋转。 具体的检测器形状包括细长矩形矩阵，例如附近的旋转中心附近的检测器单元，以提供增加的连续检测面积。 动态低剂量x射线断层合成或有限角度层析成像可以通过检查期间的X射线管和检测器运动进行，例如对人体进行透视检查。 在多个投影角度获取的数据被输入到3D图像重建算法，该算法在连续检查期间提供刷新的3D数据集。 因此，系统也可以自动跟踪三维空间中的点，例如连续地定位导管的尖端。

公开(公告)号：US06351514B1

公开(公告)日：2002-02-26

申请号：US09599763

申请日：2000-06-22

申请人： Guy M. Besson

发明人： Guy M. Besson

IPC分类号： H01B603

CPC分类号： G06T11/005 ,  A61B6/027 ,  G01T1/1644 ,  G06T11/006 ,  G06T2211/421 ,  Y10S378/901

摘要： In one embodiment, the present invention is a method for reconstructing at least one image representative of an object. This embodiment includes steps of: helically scanning the object with a multislice computed tomographic imaging system to acquire data representative of a plurality of computed tomographic image slices of an object including measurement data representative of conjugate rays; performing a minimum width helical interpolation of the acquired data to determine conjugate ray weights; increasing interpolation width when a sum of the conjugate ray weights is less than a threshold value; and filtering and backprojecting data to produce at least one image representative of the object. The filtering and backprojecting step includes weighting interpolated measurement data representative of conjugate rays using the increased interpolation width.

摘要翻译： 在一个实施例中，本发明是一种用于重建表示对象的至少一个图像的方法。 该实施例包括以下步骤：用多层计算机断层成像系统螺旋扫描物体以获取表示包含表示共轭射线的测量数据的物体的多个计算机断层图像切片的数据; 执行所获取的数据的最小宽度螺旋内插以确定共轭射线权重; 当共轭射线权重的和小于阈值时增加内插宽度; 以及过滤和反投影数据以产生代表对象的至少一个图像。 滤波和反向投影步骤包括使用增加的插值宽度来加权代表共轭射线的内插测量数据。

公开(公告)号：US06339632B1

公开(公告)日：2002-01-15

申请号：US09470770

申请日：1999-12-23

申请人： Guy M. Besson

发明人： Guy M. Besson

IPC分类号： H61B603

CPC分类号： G06T11/005 ,  A61B6/027 ,  G06T2211/428 ,  Y10S378/901

摘要： A method for rapidly processing multi-slice helical fan beam CT imaging data to generate tomographic images, the method including processing the fan beam helical data to generate parallel constant-Z projections proximate an image plane, filtering the parallel constant-Z projections and mathematically combining the filtered parallel constant-Z projections as a function of the spatial relationship between the imaging plane and the constant-Z projections to generate at least one image.

摘要翻译： 一种用于快速处理多层螺旋扇形束CT成像数据以产生断层图像的方法，所述方法包括处理扇形束螺旋数据以在图像平面附近产生平行恒定Z投影，对平行恒定Z投影进行滤波并数学组合 作为成像平面和恒定Z投影之间的空间关系的函数的经滤波的平行恒定Z投影以生成至少一个图像。

公开(公告)号：US6108575A

公开(公告)日：2000-08-22

申请号：US27278

申请日：1998-02-20

申请人： Guy M. Besson

发明人： Guy M. Besson

IPC分类号： A61B6/03 ,  G06T11/00 ,  A61B5/05

CPC分类号： G06T11/006

摘要： CT helical weighting algorithms wherein one source rotation, or 2.pi., worth of projection data is utilized for fast image reconstruction are described. Particularly, by using a distance function, and by selecting particular classes of such distance function, the discontinuity across the sinogram can be eliminated. Further, by imposing specific necessary conditions on such distance functions, single analytical expressions across the entire 2.pi. sinogram are obtained. Decomposition of these particular single distance functions provides exact, or approximated, fast two-filtering reconstruction algorithms, for which a given projection needs to be filtered only two times for an arbitrary number P of reconstruction planes. In addition, single weighting functions that depend only on the sum of the projection and fan angles can be utilized. Accordingly, after rebinning the fan-beam projections to parallel projections, the corresponding 2.pi. helical weighting algorithms do not include a dependency over the ray parameter (within one parallel projection). For these algorithms, weighting commutes with filtering, and reconstruction of an arbitrary number P of image planes requires only one filtering per projection.

摘要翻译： 描述了用于快速图像重建的CT旋转加权算法，其中一个源旋转或2π的投影数据用于快速图像重建。 特别地，通过使用距离函数，并且通过选择这种距离函数的特定类别，可以消除整个正弦图上的不连续性。 此外，通过在这样的距离函数上施加特定的必要条件，可以获得整个2个π正弦图上的单个解析表达式。 这些特定的单一距离函数的分解提供了精确或近似的快速双重滤波重建算法，对于其，给定的投影仅需要对于重构平面的任意数目P进行两次滤波。 此外，可以使用仅依赖于投影和风扇角的总和的单个加权函数。 因此，在将扇形光束投影重新组合成平行投影之后，相应的2 pi螺旋加权算法不包括对于光线参数的依赖（在一个平行投影内）。 对于这些算法，通过滤波进行权重通勤，并且重建任意数量的P个图像平面，每个投影仅需要一个滤波。

公开(公告)号：US5907593A

公开(公告)日：1999-05-25

申请号：US978802

申请日：1997-11-26

申请人： Jiang Hsieh ,  Stephen W. Metz ,  Girish Saligram ,  Guy M. Besson ,  Hui Hu ,  Sandeep Dutta ,  Robert F. Senzig ,  Min Xie

发明人： Jiang Hsieh ,  Stephen W. Metz ,  Girish Saligram ,  Guy M. Besson ,  Hui Hu ,  Sandeep Dutta ,  Robert F. Senzig ,  Min Xie

IPC分类号： A61B6/03 ,  G06T11/00

CPC分类号： G06T11/006 ,  A61B6/027 ,  G06T2211/421 ,  G06T2211/428 ,  Y10S378/901

摘要： A CT Fluoro system having an architecture and algorithms which facilitate increasing the frame rate and providing acceptable image quality is described. Generally, and in one embodiment, the system includes apparatus and algorithms that speed-up image reconstruction and reduce image artifacts that may result from such fast reconstruction. The fast reconstruction is achieved by performing, for example, view compression, channel compression, backprojection with reduced delay, and parallel processing.

摘要翻译： 描述了具有便于增加帧速率并提供可接受的图像质量的架构和算法的CT氟系统。 通常，在一个实施例中，该系统包括加速图像重构并减少可能由这种快速重建产生的图像伪像的装置和算法。 通过执行例如视图压缩，信道压缩，具有减少的延迟的反投影和并行处理来实现快速重建。

公开(公告)号：US5764720A

公开(公告)日：1998-06-09

申请号：US772548

申请日：1996-12-26

申请人： Guy M. Besson

发明人： Guy M. Besson

IPC分类号： A61B6/03 ,  G06T1/00 ,  G06T11/00

CPC分类号： G06T11/005 ,  Y10S378/901

摘要： The present invention, in one embodiment, is a system for performing image reconstruction from raw projection data acquired in a tomographic scan. More specifically, the system implements an estimation algorithm for raw projection data which does not require fully pre-processing all raw projection data for image reconstruction. Particularly, raw projection for a base view is pre-processed to generate pre-processed projection data for the base view. A linear calibration algorithm generates a linearization vector using at least a portion of the fully pre-processed projection data for the base view. The linearization vector is then applied to raw projection data for subsequent views to generate estimated pre-processed projection data for such subsequent views.

摘要翻译： 本发明在一个实施例中是一种用于从断层扫描中获取的原始投影数据执行图像重建的系统。 更具体地，该系统对原始投影数据实施估计算法，其不需要完全预处理用于图像重建的所有原始投影数据。 特别地，用于基本视图的原始投影被预处理以产生用于基本视图的预处理的投影数据。 线性校准算法使用用于基本视图的完全预处理的投影数据的至少一部分来生成线性化矢量。 然后将线性化矢量应用于用于后续视图的原始投影数据，以生成这样的后续视图的估计的预处理投影数据。

公开(公告)号：US09895125B2

公开(公告)日：2018-02-20

申请号：US14946626

申请日：2015-11-19

申请人： Guy M. Besson

发明人： Guy M. Besson

IPC分类号： A61B6/00 ,  A61B6/03

CPC分类号： A61B6/5205 ,  A61B6/032 ,  A61B6/4007 ,  A61B6/4435 ,  A61B6/54

摘要： A computed tomography scanner has multiple radiation sources or source arrays, in specific geometric dimensions for optimized imaging speed. A CT system with maximum fan-angle Γ and K simultaneously active x-ray sources distributed over an angle of π−2Γ radians, the sources partially overlapping on a detector array, measures summed projection data corresponding to K or less line-integrals at each detector element. When the CT machine's dimensions RM, Rd, and RS, corresponding respectively to the measurement field-of-view, detector distance from iso-center, and source distance from iso-center, are such that projections of the two extreme radiation sources do not overlap on the detector, the individual line-integrals can be recovered by inversion of linear systems comprising K or less rows in fewer unknown than rows; the unknowns given by the exponential of the negative of the line integrals to be recovered. The CT scanner then reconstructs an image from the line-integral estimates.