公开(公告)号：US20070297656A1

公开(公告)日：2007-12-27

申请号：US11474613

申请日：2006-06-26

Applicant: Bruno DeMan ,  Samit Kumar Basu

Inventor： Bruno DeMan ,  Samit Kumar Basu

IPC: G06K9/00 ,  G06K9/40

CPC classification number: G01N23/046 ,  A61B6/03 ,  G01N2223/419 ,  G06T11/006 ,  G06T2211/424

Abstract: Methods are provided for iteratively reconstructing an image signal to generate a reconstructed image signal. In one embodiment, sub-iterations of each iteration are performed on pixel subsets. The pixel subsets may be composed of pixels neighboring or spatially separated pixel. In a further embodiment, each iteration is performed at a different resolution. Systems and computer routines for processing image data iteratively in accordance with these techniques are also provided.

Abstract translation: 提供了用于迭代重建图像信号以产生重建图像信号的方法。 在一个实施例中，对像素子集执行每次迭代的子迭代。 像素子集可以由相邻或空间分离的像素的像素组成。 在另一个实施例中，每次迭代以不同的分辨率执行。 还提供了用于根据这些技术迭代地处理图像数据的系统和计算机程序。

公开(公告)号：US07254209B2

公开(公告)日：2007-08-07

申请号：US10707031

申请日：2003-11-17

Applicant: Qi Zhao ,  Chunhe Gong ,  Bruno De Man ,  Samit Kumar Basu ,  Fracis Howard Little

Inventor： Qi Zhao ,  Chunhe Gong ,  Bruno De Man ,  Samit Kumar Basu ,  Fracis Howard Little

IPC: A61B6/03

CPC classification number: G06T11/006 ,  G06T2211/424 ,  Y10S378/901

Abstract: A computed tomography (CT) reconstruction method includes implementing an iterative image reconstruction process for CT metrology of an object, wherein the iterative reconstruction process utilizes accurate forward projection. During each of a plurality of iterations, a reconstructed image is constrained by utilizing prior outer edge information obtained from a modality in addition to CT, and then transformed to a projection domain so as to generate a calculated sinogram. A correction image is determined based on the calculated sinogram and a measured sinogram.

Abstract translation: 计算机断层摄影（CT）重建方法包括对物体的CT计量实施迭代图像重建过程，其中迭代重建过程利用精确的向前投影。 在多个迭代中的每个迭代期间，通过利用除了CT之外的从模态获得的先前的外部边缘信息来约束重建的图像，然后将其转换为投影域，以便产生计算的正弦图。 基于计算的正弦图和测得的正弦图确定校正图像。

公开(公告)号：US07082180B2

公开(公告)日：2006-07-25

申请号：US10724461

申请日：2003-11-26

Applicant: Peter Michael Edic ,  Samit Kumar Basu

Inventor： Peter Michael Edic ,  Samit Kumar Basu

IPC: A61B6/00

CPC classification number: A61B6/507 ,  A61B6/032 ,  A61B6/481 ,  A61B6/488 ,  A61B6/5217 ,  Y10S378/901

Abstract: A method for computing volumetric perfusion in a spatially stationary organ using a computed tomography (CT) imaging system includes positioning an area detector such that the area detector encompasses a spatially stationary organ within the field of view of the imaging system for all view angles, operating the CT imaging system in a cine mode to acquire a plurality of projection data representative of the tissue dynamics in the spatially stationary organ, processing the projection data, temporally filtering respective signals from volume elements of the reconstructions of the projection data which are representative of the tissue dynamics and computing the volumetric perfusion in the organ using the temporally filtered signals from volume elements.

Abstract translation: 使用计算机断层摄影（CT）成像系统计算空间静止器官中的体积灌注的方法包括定位区域检测器，使得区域检测器在成像系统的视野范围内包含用于所有视角的空间静止器官，操作 CT成像系统以电影模式获取表示空间静止器官中的组织动力学的多个投影数据，处理投影数据，对代表投影数据的投影数据的重建的体积元素的各个信号进行时间滤波 组织动力学和使用来自体积元素的时间滤波信号计算器官中的体积灌注。

公开(公告)号：US20140010426A1

公开(公告)日：2014-01-09

申请号：US13542800

申请日：2012-07-06

Applicant: Samit Kumar Basu

Inventor： Samit Kumar Basu

IPC: G06K9/40 ,  H05G1/60 ,  G06K9/00

CPC classification number: G06T11/005

Abstract: A computer-implemented method for correcting artifacts in measured image data due to differential scatter rejection in a computed tomography system is provided. A system for correcting artifacts in measured image data due to differential scatter rejection in a computed tomography system is also provided. Additionally, a non-transitory computer readable storage medium storing computer-executable instructions thereon for correcting artifacts in measured image data due to differential scatter rejection in a computed tomography system is provided

Abstract translation: 提供了一种用于在计算机断层摄影系统中校正由于差分散射抑制引起的测量图像数据中的伪像的计算机实现的方法。 还提供了一种用于在计算机断层摄影系统中校正由于差分散射抑制引起的测量图像数据中的伪影的系统。 另外，提供了一种非暂时性的计算机可读存储介质，用于在计算机断层摄影系统中存储由于差分散射抑制而在其上校正测量图像数据中的伪影的计算机可执行指令

公开(公告)号：US20140010343A1

公开(公告)日：2014-01-09

申请号：US13543255

申请日：2012-07-06

Applicant: Samit Kumar Basu ,  Pedro Andres Garzon

Inventor： Samit Kumar Basu ,  Pedro Andres Garzon

IPC: G01N23/04 ,  B23P11/00

CPC classification number: G01T1/2985 ,  G01N23/046 ,  G01N2223/419 ,  G01V5/005 ,  Y10T29/49826

Abstract: An imaging system is provided. The imaging system includes a rotating gantry. An x-ray source is mounted to the gantry. The system also includes a plurality of interchangeable x-ray detector modules is mounted to the gantry, opposite the x-ray source. The plurality of interchangeable detector modules includes a first detector module mounted at a first distance from the x-ray source and a second detector module mounted at a second distance from the x-ray source. The first distance is different from the second distance.

Abstract translation: 提供成像系统。 成像系统包括旋转机架。 X射线源安装在龙门架上。 该系统还包括多个可互换的x射线探测器模块，安装到与X射线源相对的台架。 多个可互换检测器模块包括安装在离x射线源第一距离处的第一检测器模块和安装在离x射线源第二距离处的第二检测器模块。 第一距离与第二距离不同。

公开(公告)号：US20110051886A1

公开(公告)日：2011-03-03

申请号：US12550597

申请日：2009-08-31

Applicant: Samit Kumar Basu ,  Eugene Alex Ingerman

Inventor： Samit Kumar Basu ,  Eugene Alex Ingerman

IPC: H05G1/60 ,  H05G1/10 ,  G01N23/04

CPC classification number: G01N23/046 ,  G01N2223/419 ,  G01N2223/643

Abstract: A method for scanning a stream of objects includes continuously acquiring raw data of the stream of objects using an X-ray system, that includes a detector. The raw data of the stream of objects is rebinned into at least one two-dimensional sinogram. A leading edge and a trailing edge of a first object of the stream of objects is determined from the at least one two-dimensional sinogram and a three-dimensional image of the first object is reconstructed using the at least one two-dimensional sinogram.

Abstract translation: 用于扫描对象流的方法包括使用包括检测器的X射线系统连续获取物体流的原始数据。 对象流的原始数据被重新组合成至少一个二维正弦图。 从所述至少一个二维正弦图确定所述物体流的第一物体的前缘和后缘，并且使用所述至少一个二维正弦图重建所述第一物体的三维图像。

公开(公告)号：US07852979B2

公开(公告)日：2010-12-14

申请号：US11954295

申请日：2007-12-12

Applicant: Peter Michael Edic ,  Samit Kumar Basu

Inventor： Peter Michael Edic ,  Samit Kumar Basu

IPC: A61B6/03 ,  H05G1/60 ,  H05G1/64 ,  H01J35/06 ,  H01J35/30

CPC classification number: A61B6/405 ,  A61B6/027 ,  A61B6/032 ,  A61B6/4021 ,  A61B6/4028 ,  A61B6/4035 ,  A61B6/4085 ,  A61B6/4233 ,  A61B6/482 ,  G01T1/295 ,  G01T1/2985 ,  G01V5/0041 ,  G01V5/005 ,  H01J35/14 ,  H01J35/30

Abstract: A CT system includes a rotatable gantry having an opening for receiving an object to be scanned, at least one x-ray source coupled to the gantry and configured to project x-rays toward the object, a detector coupled to the gantry and having a scintillator therein and configured to receive x-rays that pass through the object, and a generator configured to energize the at least one x-ray source. The system includes a controller configured to energize the generator to project a first beam of x-rays toward the object from a first focal spot position of an anode, the first beam of x-rays having a ray traversing a path through the object, acquire imaging data from the first beam of x-rays, position the at least one x-ray source such that a second beam of x-rays projected from a second focal spot position of the anode has a ray directed to traverse the path through the object, the second anode focal spot position different than the first anode focal spot position, energize the generator to project the second beam of x-rays toward the object, and acquire imaging data from the second beam of x-rays.

Abstract translation: CT系统包括具有用于接收待扫描物体的开口的可旋转台架，耦合到台架并被配置为向物体投射X射线的至少一个x射线源，耦合到台架并具有闪烁体 并且被配置为接收穿过物体的x射线，以及被配置为激励至少一个x射线源的发生器。 该系统包括控制器，该控制器被配置为对发生器进行激励，以从阳极的第一焦斑位置朝向物体投射第一射线束，第一射线X射线具有穿过物体的路径的光线 从X射线的第一束成像数据，定位至少一个x射线源，使得从阳极的第二焦点位置投影的第二射线束具有指向穿过物体的路径的射线 第二阳极焦点位置不同于第一阳极焦斑位置，激励发生器将第二射线束朝向物体投射，并从第二射线束获取成像数据。

公开(公告)号：US07706499B2

公开(公告)日：2010-04-27

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: H05G1/60

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：US20090039273A1

公开(公告)日：2009-02-12

申请号：US11837328

申请日：2007-08-10

Applicant: John Eric Tkaczyk ,  Samit Kumar Basu ,  Wen Li ,  Yanfeng Du

Inventor： John Eric Tkaczyk ,  Samit Kumar Basu ,  Wen Li ,  Yanfeng Du

IPC: G01T1/24

CPC classification number: G01T1/171 ,  G01T1/247 ,  G01T1/249

Abstract: A photon-counting detector includes a direct conversion material constructed to directly convert an energy of at least one incident photon to an electrical signal indicative of the energy level of the at least one individual photon and a data acquisition system (DAS). The DAS includes a first comparator having a first signal level threshold that is less than an electrical signal level that is indicative of a maximum energy of a spectrum of photons, the first comparator configured to output a count when the electrical signal level exceeds the first signal level threshold, and a second comparator having a second signal level threshold that is greater than or equal to the electrical signal level indicative of the maximum energy of the spectrum of photons, the second comparator configured to output a count when the electrical signal exceeds the second signal level threshold. The DAS further includes a device configured to determine a photon count based on the counts from the first and second comparators and to output the photon count for image reconstruction.

Abstract translation: 光子计数检测器包括被直接转换至少一个入射光子的能量到指示至少一个单独光子和数据采集系统（DAS）的能级的电信号的直接转换材料。 DAS包括第一比较器，其具有小于指示光子谱的最大能量的电信号电平的第一信号电平阈值，第一比较器被配置为当电信号电平超过第一信号时输出计数 以及具有大于或等于指示光子谱的最大能量的电信号电平的第二信号电平阈值的第二比较器，所述第二比较器被配置为当电信号超过第二电平时输出计数 信号电平门限。 DAS还包括被配置为基于来自第一和第二比较器的计数确定光子计数并输出用于图像重建的光子计数的装置。

公开(公告)号：US07433443B1

公开(公告)日：2008-10-07

申请号：US11846664

申请日：2007-08-29

Applicant: John Eric Tkaczyk ,  Samit Kumar Basu ,  Xiaoye Wu ,  Yanfeng Du

Inventor： John Eric Tkaczyk ,  Samit Kumar Basu ,  Xiaoye Wu ,  Yanfeng Du

IPC: H05G1/26

CPC classification number: A61B6/4014 ,  A61B6/032 ,  A61B6/4241 ,  G01T1/2985

Abstract: A CT imaging system includes a rotatable gantry having an opening to receive an object to be scanned, a first x-ray emission source attached to the rotatable gantry and configured to emit x-rays toward the object, and a second x-ray emission source attached to the rotatable gantry and configured to emit x-rays toward the object. A first detector is configured to receive x-rays that emit from the first x-ray emission source, and a second detector configured to receive x-rays that emit from the second x-ray emission source. A first portion of the first detector is configured to operate in an integration mode and a first portion of the second detector is configured to operate in at least a photon-counting mode.

Abstract translation: CT成像系统包括可旋转机架，其具有用于接收待扫描物体的开口，附接到可旋转机架并被配置为朝向物体发射x射线的第一x射线发射源，以及第二x射线发射源 附接到可旋转机架并且被配置为朝向物体发射X射线。 第一检测器被配置为接收从第一x射线发射源发射的X射线，以及第二检测器，被配置为接收从第二x射线发射源发射的X射线。 第一检测器的第一部分被配置为以积分模式操作，并且第二检测器的第一部分被配置为以至少光子计数模式操作。