公开(公告)号：US06970585B1

公开(公告)日：2005-11-29

申请号：US09380654

申请日：1998-02-12

申请人： Ehud Dafni ,  Uri Shreter ,  Haim Gelman

发明人： Ehud Dafni ,  Uri Shreter ,  Haim Gelman

IPC分类号： A61B6/03 ,  A61B6/12 ,  G06K9/00

CPC分类号： A61B6/032 ,  A61B6/027 ,  Y10S128/922

摘要： A method for modifying a planar image slice in a CT scanner having a predetermined reconstruction angle, comprising: reconstructing an image of the slice using initial X-ray attenuation data acquired along an initial scan path sector; acquiring additional X-ray attenuation data along an additional scan path sector in a vicinity of the axial position of the slice, the sector having an angular extent substantially less than the reconstruction angle; and modifying the image, to provide a modified image of the slice, responsible to the additional attenuation data.

摘要翻译： 一种用于修改具有预定重建角度的CT扫描器中的平面图像切片的方法，包括：使用沿着初始扫描路径扇区获取的初始X射线衰减数据重建切片的图像; 沿切片的轴向位置附近沿着另外的扫描路径扇区获取附加的X射线衰减数据，所述扇区具有基本上小于重建角度的角度范围; 并修改图像，以提供切片的修改图像，负责附加的衰减数据。

公开(公告)号：US20140037045A1

公开(公告)日：2014-02-06

申请号：US14110459

申请日：2012-04-04

申请人： Ehud Dafni ,  David Ruimi ,  Olga Shapiro

发明人： Ehud Dafni ,  David Ruimi ,  Olga Shapiro

IPC分类号： G01T1/16 ,  G01N23/04

CPC分类号： G01T1/16 ,  A61B6/032 ,  A61B6/4233 ,  A61B6/4241 ,  A61B6/5205 ,  G01N23/046 ,  G01N2223/419 ,  G01T1/2985

摘要： A dual energy CT scanner includes an X ray source generating an X-ray beam, a stacked detector array for detecting radiation from the X-ray beam, the stacked detector array including a first layer of detectors and a second layer of detectors, wherein a packing density of detectors in at least a portion of the first layer is different than a packing density of detectors in a corresponding portion of the second layer, a data acquisition unit for sampling data from the detectors in the first and second layer; and an image reconstruction unit for reconstructing an image from data acquired from at least one layer of the stacked detector array.

摘要翻译： 双能量CT扫描器包括产生X射线束的X射线源，用于检测来自X射线束的辐射的堆叠检测器阵列，堆叠的检测器阵列包括第一层检测器和第二层检测器，其中a 在第一层的至少一部分中的检测器的堆积密度不同于第二层的相应部分中的检测器的堆积密度，数据获取单元，用于从第一层和第二层中的检测器采样数据; 以及图像重建单元，用于根据从堆叠的检测器阵列的至少一层获取的数据重构图像。

公开(公告)号：US08537965B2

公开(公告)日：2013-09-17

申请号：US12965968

申请日：2010-12-13

申请人： Ehud Dafni

发明人： Ehud Dafni

IPC分类号： G01N23/00

CPC分类号： A61B6/4085 ,  A61B6/032 ,  A61B6/4007 ,  A61B6/4014 ,  A61B6/4028 ,  A61B6/4291 ,  H01J35/045 ,  H05G1/70

摘要： An X-ray source system for a CT scanner includes a plurality of X-ray sources, wherein each X-ray source of the plurality is provided with a cathode from which an electron beam is emitted, an anode to receive the electron beam and at least one grid electrode, wherein the grid electrodes are configured to selectably block radiation from said X-ray sources; a high voltage generator for applying voltage to the plurality of X-ray sources, wherein each of the plurality of X-ray sources are configured to present substantially the same load to the high voltage generator; a grid modulator configured to apply voltage to grid electrodes of each of the plurality of X-ray sources in turn; and a controller for controlling the grid modulator so that only one of the plurality of X-ray sources emits radiation at any one time.

摘要翻译： 用于CT扫描仪的X射线源系统包括多个X射线源，其中，多个X射线源中的每个X射线源设置有阴极，从该阴极发射电子束，接收电子束的阳极和 至少一个栅电极，其中所述栅电极被配置为可选择地阻挡来自所述X射线源的辐射; 用于向所述多个X射线源施加电压的高电压发生器，其中，所述多个X射线源中的每一个被配置为向所述高压发生器施加大致相同的负载; 电网调制器，其被配置为依次将电压施加到所述多个X射线源中的每一个的栅电极; 以及控制器，用于控制所述电网调制器，使得所述多个X射线源中的仅一个在任何一个时间发射辐射。

公开(公告)号：US08451972B2

公开(公告)日：2013-05-28

申请号：US12910786

申请日：2010-10-23

申请人： Ehud Dafni

发明人： Ehud Dafni

IPC分类号： G01N23/00

CPC分类号： A61B6/06 ,  A61B6/027 ,  A61B6/032 ,  A61B6/4021 ,  A61B6/4028 ,  A61B6/4452 ,  A61B6/486 ,  A61B6/503 ,  A61B6/541

摘要： Disclosed are methods, circuits, devices, assemblies and systems for performing Computer Tomography (CT)—for example of a periodically moving object such as a heart. According to some embodiments, there is provided a Computer Tomography scanner which includes an x-ray source adapted to generate an x-ray scan beam and a electromechanical assembly to which the x-ray source is mounted. The assembly may be adapted to move one or more electromechanical elements such that the scan beam is moved around the periodically moving object with a velocity profile having both constant and cyclically alternating rotational velocity components, and wherein the cyclically alternating velocity components are synchronized with the periodic motion of the object.

摘要翻译： 公开了用于执行计算机断层扫描（CT）的方法，电路，装置，组件和系统 - 例如周期性移动的物体（例如心脏）。 根据一些实施例，提供了一种计算机断层摄影扫描器，其包括适于产生x射线扫描束的x射线源和安装x射线源的机电组件。 组件可以适于移动一个或多个机电元件，使得扫描光束以周期性移动的物体移动，速度分布具有恒定和循环交替的旋转速度分量，并且其中循环交替的速度分量与周期性的 物体的运动。

公开(公告)号：US20110033024A1

公开(公告)日：2011-02-10

申请号：US12937290

申请日：2009-04-06

申请人： Ehud Dafni ,  Rafi Brada ,  David Ruimi

发明人： Ehud Dafni ,  Rafi Brada ,  David Ruimi

IPC分类号： A61B6/03

CPC分类号： A61B6/032 ,  A61B6/027 ,  A61B6/4028

摘要： A CT scanner comprises at least one cone beam x-ray source assembly mounted on a gantry frame, the gantry frame rotatable about a rotation axis, the x-ray source assembly operable to emit a cone beam at an orientation with respect to the rotation axis, and a controller operable to adjust an orientation of the cone beam during a rotation cycle of the gantry, wherein the controller adjusts the orientation to radiate a substantially same volume of interest over the rotation cycle.

摘要翻译： CT扫描器包括安装在台架框架上的至少一个锥形束x射线源组件，所述台架可围绕旋转轴线旋转，所述X射线源组件可操作以相对于旋转轴线的取向发射锥形束 以及控制器，其可操作以在所述台架的旋转周期期间调节所述锥形梁的取向，其中所述控制器调整所述取向以在所述旋转周期上辐射基本相同的感兴趣体积。

公开(公告)号：US07769138B2

公开(公告)日：2010-08-03

申请号：US10599279

申请日：2004-03-29

申请人： Ehud Dafni

发明人： Ehud Dafni

IPC分类号： H05G1/64

CPC分类号： A61B6/482 ,  A61B6/4035 ,  A61B6/4092 ,  A61B6/4233 ,  A61B6/4241 ,  A61B6/4441 ,  A61B6/481 ,  A61B6/503 ,  A61B6/504

摘要： The x-ray tube is energized (12) and the myocardium is imaged (16) while contrast agent is infused to the coronary arteries of the subject (14). Single photon counting data acquired with the detector while two thresholds are set to form simultaneously low energy images and high energy images (16). The images are processed (18) and displayed (20).

摘要翻译： （12），并将心肌成像（16），同时将造影剂注入受试者的冠状动脉（14）。 单个光子计数数据由检测器采集，同时设置两个阈值同时形成低能量图像和高能量图像（16）。 图像被处理（18）并显示（20）。

公开(公告)号：US06400789B1

公开(公告)日：2002-06-04

申请号：US09367769

申请日：2000-01-19

申请人： Ehud Dafni

发明人： Ehud Dafni

IPC分类号： A61B600

CPC分类号： A61B6/032 ,  A61B6/027 ,  Y10S128/922

摘要： A method for reconstructuring a planar image slice in a CT scanner having a predetermined reconstrunction angle and including a detector array having n rows, n being an integer greater than 1, said method comprising: acquiring X-ray attentuation data from the detector array along a predetermined portion of a helical scan path in the vicinity of an axial position corresponding to the planar image slice, wherein the predetermined portion has an angular extent that is generally equal to the reconstruction angle; and processing the data to reconstruct an image of the slice, using data acquired substantially only along the predetermined portion of the scan path.

摘要翻译： 一种重建具有预定重合角的CT扫描器中的平面图像切片的方法，包括具有n行的检测器阵列，n是大于1的整数，所述方法包括：沿着检测器阵列获取X射线注意数据 在与平面图像切片对应的轴向位置附近的螺旋扫描路径的预定部分，其中所述预定部分具有大致等于所述重建角度的角度范围; 以及使用基本上仅沿着扫描路径的预定部分获取的数据来处理数据以重构切片的图像。

公开(公告)号：US20100215142A1

公开(公告)日：2010-08-26

申请号：US11921238

申请日：2006-05-31

申请人： Ehud Dafni ,  Yosi Morik

发明人： Ehud Dafni ,  Yosi Morik

IPC分类号： A61B6/03

CPC分类号： G01N23/046 ,  A61B6/032 ,  A61B6/4208 ,  A61B6/4233 ,  G01N2223/419 ,  G01N2223/612 ,  G01T1/24 ,  G01T1/249 ,  G01T1/2985

摘要： A CT scanner comprising: a rotor rotatable about an axis of rotation: an X-ray source mounted to the rotor having a focal spot from which an X-ray beam emanates; an X-ray detector array comprising a plurality of X-ray detectors for detecting X-rays in the X-ray beam; wherein the detector array has at least one high resolution region in which detectors have a high packing density and at least one low resolution region in which detectors have a low packing density and are separated by X-ray insensitive regions substantially larger than insensitive regions resulting from septa between detectors that function to reduce detector cross talk.

摘要翻译： 一种CT扫描仪，包括：可围绕旋转轴线旋转的转子：安装到所述转子上的X射线源具有发出X射线束的焦点; X射线检测器阵列，包括用于检测X射线束中的X射线的多个X射线检测器; 其中所述检测器阵列具有至少一个高分辨率区域，其中检测器具有高的堆积密度和至少一个低分辨率区域，其中检测器具有低的堆积密度，并且由不受敏感区域的X射线不敏感区域分离， 检测器之间的隔垫功能可以减少检测器串扰。

公开(公告)号：US20090285355A1

公开(公告)日：2009-11-19

申请号：US12120841

申请日：2008-05-15

申请人： Rafael Brada ,  Ehud Dafni

发明人： Rafael Brada ,  Ehud Dafni

IPC分类号： A61B6/00

CPC分类号： A61B6/022 ,  A61B6/035 ,  A61B6/04 ,  A61B6/08 ,  A61B6/4007 ,  A61B6/4028 ,  A61B6/463 ,  A61B6/488 ,  A61B6/504 ,  A61B6/541

摘要： An apparatus and method for optimally positioning a region of interest of a subject for imaging by a CT scanner. The scanner provides a source of one or more X-ray beams, at least one of which is used for acquiring a CT image of the subject, a movable support for the subject, and a controller that controls the X-ray source. To position the region of interest of the subject, the controller operates to illuminate the subject with X-rays to acquire stereo image data for the region of interest and controls the position of the support responsive to the stereo image data.

摘要翻译： 一种用于最佳地定位用于由CT扫描仪成像的对象的感兴趣区域的装置和方法。 扫描器提供一个或多个X射线束的源，其中至少一个用于获取被检体的CT图像，用于对象的可移动支撑件以及控制X射线源的控制器。 为了定位对象的感兴趣区域，控制器操作以用X射线照射被摄体以获取感兴趣区域的立体图像数据，并且响应于立体图像数据来控制支架的位置。

公开(公告)号：US06914957B2

公开(公告)日：2005-07-05

申请号：US10312952

申请日：2001-12-19

申请人： Ehud Dafni ,  James W. Green

发明人： Ehud Dafni ,  James W. Green

IPC分类号： A61B6/00 ,  A61B6/03

CPC分类号： A61B6/56 ,  A61B6/032

摘要： A CT-scanner having a gantry comprising a stator and a rotor, wherein an X-ray source and array of X-ray detectors are mounted to the rotor for determining absorption of X-rays along paths through the body of a patient imaged by the CT-scanner, the CT imager comprising: a processor that processes data comprised in signals generated by the X-ray detectors responsive to intensity of X-rays from the X-ray source incident on the detectors to generate an image of the patient; at least one spread spectrum transmitter that receives data comprised in the signals generated by the X-ray detectors and transmits signals encoded with the data in accordance with a spread spectrum coding; and at least one spread spectrum receiver that receives the encoded signals transmitted by the at least one spread spectrum transmitter and forwards the encoded data to the processor.

摘要翻译： 一种CT扫描器，其具有包括定子和转子的台架，其中X射线源和X射线检测器阵列安装到转子上，用于确定沿着穿过身体的X射线的吸收， CT扫描仪，CT成像器包括：处理器，其响应于来自入射在检测器上的X射线源的X射线的强度，处理由X射线检测器产生的信号中包含的数据，以产生患者的图像; 至少一个扩频发射机，其接收由X射线检测器产生的信号中包含的数据，并根据扩频编码发送用该数据编码的信号; 以及至少一个扩展频谱接收机，其接收由所述至少一个扩频发射机发送的编码信号，并将编码数据转发到处理器。