公开(公告)号：US07260170B2

公开(公告)日：2007-08-21

申请号：US11627144

申请日：2007-01-25

Applicant: Jerome Stephen Arenson ,  David Ruimi ,  Evgeny Drapkin ,  Dmitry Samsonov ,  Bruno K. B. De Man ,  Samit Kumar Basu

Inventor： Jerome Stephen Arenson ,  David Ruimi ,  Evgeny Drapkin ,  Dmitry Samsonov ,  Bruno K. B. De Man ,  Samit Kumar Basu

IPC: G01N23/00

CPC classification number: G01T1/1644 ,  A61B6/027 ,  A61B6/032 ,  A61B6/4241 ,  A61B6/482 ,  A61B6/583 ,  G01T1/1647 ,  G06T5/002 ,  G06T5/20 ,  G06T2207/10081 ,  G06T2207/30004 ,  G06T2207/30112 ,  Y10S378/901

Abstract: An adaptive CT data acquisition system and technique is presented whereby radiation emitted for CT data acquisition is dynamically controlled to limit exposure to those detectors of a CT detector assembly that may be particularly susceptible to saturation during a given data acquisition. The data acquisition technique recognizes that for a given subject size and position that pre-subject filtering and collimating of a radiation beam may be insufficient to completely prevent detector saturation. Therefore, the present invention includes implementation of a number of CT data correction techniques for correcting otherwise unusable data of a saturated CT detector. These data correction techniques include a nearest neighbor correction, off-centered phantom correction, off-centered synthetic data correction, scout data correction, planar radiogram correction, and a number of others. The invention is applicable with energy discriminating CT systems as well as with conventional CT systems and other multi-energy CT systems, such as dual kVp-based systems.

公开(公告)号：US07242749B2

公开(公告)日：2007-07-10

申请号：US11273851

申请日：2005-11-15

Applicant: Jiang Hsieh ,  Alexander Katsevich ,  Samit Kumar Basu

Inventor： Jiang Hsieh ,  Alexander Katsevich ,  Samit Kumar Basu

IPC: G21K1/04

CPC classification number: A61B6/032 ,  A61B6/027 ,  A61B6/06 ,  G21K1/04

Abstract: Methods and systems for controlling x-ray exposure during a dynamic pitch helical scan using a translatable table are provided. The system includes a collimator positioned between an x-ray source and an object to be scanned configured to shutter an x-ray fan beam generated by the x-ray source to at least one of translate the x-ray fan beam along a z-axis of the scan and vary the width of the x-ray beam along the z-axis, and a collimator controller configured to dynamically position the collimator using at least one of predetermined trajectory of the translatable table and a current position of the translatable table.

公开(公告)号：US07016456B2

公开(公告)日：2006-03-21

申请号：US10699087

申请日：2003-10-31

Applicant: Samit Kumar Basu ,  Peter Michael Edic ,  Bruno Kristiaan Bernard De Man

Inventor： Samit Kumar Basu ,  Peter Michael Edic ,  Bruno Kristiaan Bernard De Man

IPC: A61B6/03

CPC classification number: A61B6/583 ,  A61B6/032

Abstract: The present invention provides a method for determining a geometry of a scanning volumetric computed tomographic (CT) system having a rotation axis, a rotational plane, an x-ray source and a detector. The method includes scanning a phantom having a series of spatially separated discrete markers with the scanning volumetric computed tomographic system, wherein the markers are configured on a supporting structure of the phantom so as to permit separate identification of each marker in a collection of projection images. The method further includes locating images of the markers in each projection, using the located marker images to assign marker locations to tracks, and using the assigned tracks, determining a relative alignment between the detector, the source, and the rotation axis of the scanning volumetric computed tomographic system.

Abstract translation: 本发明提供了一种用于确定具有旋转轴，旋转平面，x射线源和检测器的扫描体积计算机断层摄影（CT）系统的几何形状的方法。 该方法包括用扫描体积计算机断层摄影系统扫描具有一系列空间分离的离散标记的体模，其中标记被配置在体模的支撑结构上，以允许在投影图像的集合中单独识别每个标记。 该方法还包括使用定位的标记图像将标记的图像定位在每个投影中，以将标记位置分配给轨迹，并使用分配的轨迹，确定扫描体积的检测器，源和旋转轴之间的相对对准 计算机断层摄影系统。

公开(公告)号：US20110243413A1

公开(公告)日：2011-10-06

申请号：US12750050

申请日：2010-03-30

Applicant: John Eric Tkaczyk ,  David Allen Langan ,  Samit Kumar Basu ,  Xiaoye Wu ,  Bruno Kristiaan Bernard De Man ,  Jeffrey Seymour Gordon

Inventor： John Eric Tkaczyk ,  David Allen Langan ,  Samit Kumar Basu ,  Xiaoye Wu ,  Bruno Kristiaan Bernard De Man ,  Jeffrey Seymour Gordon

IPC: G06K9/00 ,  G01N23/04 ,  H05G1/60

CPC classification number: A61B6/4035 ,  A61B6/032 ,  A61B6/405 ,  A61B6/4241 ,  A61B6/482 ,  A61B6/488 ,  A61B6/542

Abstract: A technique for acquiring desired image data in an imaging system comprising at least one radiation source and a detector is described. Initially, preliminary image data corresponding to an object may be acquired. Further, at least one parameter associated with the radiation source and corresponding to a particular view angle of the radiation source may be determined based on the preliminary image data and a priori information. Similarly, at least one parameter associated with the detector and corresponding to the particular view angle may be determined based on a priori information and the preliminary image data. Efficient operating modes of the radiation source and the detector corresponding to the particular view angle may be selected based on the determined parameters to achieve a desired system performance. Subsequently, the final image data may be acquired using the selected operating modes of the radiation source and the detector.

Abstract translation: 描述了在包括至少一个辐射源和检测器的成像系统中获取所需图像数据的技术。 首先，可以获取与对象相对应的初步图像数据。 此外，可以基于初步图像数据和先验信息来确定与辐射源相关联并且对应于辐射源的特定视角的至少一个参数。 类似地，可以基于先验信息和初步图像数据来确定与检测器相关联并且对应于特定视角的至少一个参数。 可以基于确定的参数来选择对应于特定视角的辐射源和检测器的有效操作模式以实现期望的系统性能。 随后，可以使用所选择的辐射源和检测器的操作模式来获取最终图像数据。

公开(公告)号：US20100230242A1

公开(公告)日：2010-09-16

申请号：US12401907

申请日：2009-03-11

Applicant: Samit Kumar Basu ,  Pierfrancesco Landolfi ,  Sussan Pourjavid-Granfors ,  Eugene Alex Ingerman ,  Jian Gao ,  Mikhail Kourinny ,  Francois Robert Gaultier

Inventor： Samit Kumar Basu ,  Pierfrancesco Landolfi ,  Sussan Pourjavid-Granfors ,  Eugene Alex Ingerman ,  Jian Gao ,  Mikhail Kourinny ,  Francois Robert Gaultier

IPC: B65G47/00 ,  G01J5/00

CPC classification number: G01N23/046 ,  G01N2223/419 ,  G01V5/0008

Abstract: A method for scanning a stream of objects includes conveying the stream of objects through a scanning system using a conveyor, marking a leading edge position of an object within the stream of objects with respect to a first known distance between a sensor and a start of a scan range, and recording data associated with the object when the leading edge position reaches the start of the scan range. The method also includes marking a trailing edge position of the object with respect to a second known distance between the sensor and an end of the scan range, halting recording of the data when the trailing edge reaches the end of the scan range, and generating a three-dimensional image of the object based on the recorded data.

Abstract translation: 用于扫描物体流的方法包括通过使用传送器的扫描系统传送物体流，相对于传感器和开始物体之间的第一已知距离，在物体流内标记物体的前缘位置 扫描范围，以及当前沿位置到达扫描范围的开始时与物体相关联的记录数据。 所述方法还包括相对于所述传感器与所述扫描范围的结束之间的第二已知距离来标记所述物体的后缘位置，当所述后沿到达所述扫描范围的终点时停止所述数据的记录，以及产生 基于记录数据的对象的三维图像。

公开(公告)号：US07551708B2

公开(公告)日：2009-06-23

申请号：US11672137

申请日：2007-02-07

Applicant: Samit Kumar Basu ,  Bruno Kristiaan Bernard DeMan

Inventor： Samit Kumar Basu ,  Bruno Kristiaan Bernard DeMan

IPC: A61B6/00

CPC classification number: G01N23/046 ,  G01N2223/419

Abstract: A new method extends iterated coordinate descent (“ICD”)—an optimization method employed in some statistical reconstruction algorithms—to handle material decomposition (“MD”) for energy discriminating computed tomography (“EDCT”) acquisitions.

Abstract translation: 一种新的方法扩展了迭代坐标下降（“ICD”） - 一些统计重建算法中采用的优化方法，用于处理能量鉴别计算机断层扫描（“EDCT”）采集的材料分解（“MD”）。

公开(公告)号：US07379525B2

公开(公告)日：2008-05-27

申请号：US11011358

申请日：2004-12-15

Applicant: Samit Kumar Basu ,  Bruno Kristiaan Bernard De Man

Inventor： Samit Kumar Basu ,  Bruno Kristiaan Bernard De Man

IPC: A61B6/03

CPC classification number: A61B6/032 ,  A61B6/027 ,  G01N23/046 ,  G01N2223/3304 ,  G01N2223/419 ,  Y10S378/901

Abstract: A method for reconstructing cone-beam projection data is provided. The method comprises scanning an object in helical mode, wherein the scanning comprises obtaining cone-beam projection data. The method further comprises processing the cone-beam projection data along a plurality of data filtering curves. The processing includes processing the cone-beam projection data along a portion of the data filtering curves that extends outside of a physical detector area to a virtual detector area. Then, the method comprises using the processed cone-beam projection data in the generation of a reconstructed image of the object.

Abstract translation: 提供了一种重建锥束投影数据的方法。 该方法包括以螺旋模式扫描物体，其中扫描包括获得锥束投影数据。 该方法还包括沿多个数据滤波曲线处理锥形束投影数据。 该处理包括沿着在物理检测器区域外延伸到虚拟检测器区域的数据滤波曲线的一部分处理锥形束投影数据。 然后，该方法包括在生成对象的重建图像时使用经处理的锥束投影数据。

公开(公告)号：US07362843B2

公开(公告)日：2008-04-22

申请号：US10948663

申请日：2004-09-23

Applicant: Samit Kumar Basu ,  Bruno Kristiaan Bernard Deman

Inventor： Samit Kumar Basu ,  Bruno Kristiaan Bernard Deman

IPC: A61B6/03

CPC classification number: G06T11/005 ,  G06T2211/424 ,  Y10S378/901

Abstract: A method for reconstructing image data from acquired tomographic projection data measurements is provided. The projection data measurements comprise one or more missing data measurements. The method comprises generating a coarse-resolution projection data set from the acquired projection data measurements and performing an iterative reconstruction on the coarse-resolution projection data set to generate a coarse-resolution reconstructed data set. Then, the method comprises reprojecting the coarse-resolution reconstructed data set to obtain one or more estimates for the one or more missing data measurements. The one or more estimated missing data measurements are then recombined with the acquired projection data measurements, to generate a recombined data set. Then, a direct reconstruction algorithm is applied to the recombined data set to generate the reconstructed image data.

Abstract translation: 提供了一种从获取的断层摄影投影数据测量重建图像数据的方法。 投影数据测量包括一个或多个丢失的数据测量。 该方法包括从所获取的投影数据测量中产生粗分辨率投影数据集，并对粗分辨率投影数据集执行迭代重建以产生粗分辨率重建数据集。 然后，该方法包括重新投影粗分辨率重构数据集以获得一个或多个丢失数据测量的一个或多个估计。 然后将一个或多个估计的丢失数据测量与所获取的投影数据测量重组，以产生重组数据集。 然后，将直接重建算法应用于重组数据集，以生成重构图像数据。

公开(公告)号：US20080056437A1

公开(公告)日：2008-03-06

申请号：US11725892

申请日：2007-03-20

Applicant: Jed Douglas Pack ,  Zhye Yin ,  Samit Kumar Basu ,  John Charles Hill ,  Peter Michael Edic

Inventor： Jed Douglas Pack ,  Zhye Yin ,  Samit Kumar Basu ,  John Charles Hill ,  Peter Michael Edic

IPC: G01N23/00

CPC classification number: G01T1/2985 ,  A61B6/027

Abstract: Systems and methods are provided for acquiring and reconstructing projection data using a computed tomography (CT) system having stationary distributed X-ray sources and detector arrays. In one embodiment, a non-sequential activation of X-ray source locations on an annular source is employed to acquire projection data. In another embodiment, a distributed source is tilted relative to an axis of the scanner to acquire the projection data. In a further embodiment, a plurality of X-ray source locations on an annular source are activated such that the aggregated signals correspond to two or more sets of spatially interleaved helical scan data.

Abstract translation: 提供了使用具有固定分布式X射线源和检测器阵列的计算机断层摄影（CT）系统来获取和重建投影数据的系统和方法。 在一个实施例中，使用在环形源上的X射线源位置的非顺序激活来获取投影数据。 在另一个实施例中，分布式源相对于扫描器的轴线倾斜以获取投影数据。 在另一实施例中，环形源上的多个X射线源位置被激活，使得聚集的信号对应于两组或多组空间交错的螺旋扫描数据。

公开(公告)号：US20080056435A1

公开(公告)日：2008-03-06

申请号：US11726023

申请日：2007-03-20

Applicant: Samit Kumar Basu ,  Bruno De Man ,  Jed Douglas Pack ,  Xiaoye Wu ,  Zhye Yin ,  Peter Michael Edic

Inventor： Samit Kumar Basu ,  Bruno De Man ,  Jed Douglas Pack ,  Xiaoye Wu ,  Zhye Yin ,  Peter Michael Edic

IPC: G01N23/00

CPC classification number: G01T1/2985 ,  A61B6/027

Abstract: Systems and methods are provided for acquiring and reconstructing projection data that is mathematically complete or sufficient using a computed tomography (CT) system having stationary distributed X-ray sources and detector arrays. In one embodiment, a distributed source is provided as arcuate segments offset in the X-Y plane and along the Z-axis.

Abstract translation: 提供了系统和方法，用于使用具有固定分布式X射线源和检测器阵列的计算机断层摄影（CT）系统来获取和重建数学上完整或足够的投影数据。 在一个实施例中，分布式源被提供为在X-Y平面和Z轴上偏移的弧形段。