公开(公告)号：US07715519B2

公开(公告)日：2010-05-11

申请号：US12177393

申请日：2008-07-22

Applicant: Shinsuke Tsukagoshi ,  Yasuko Fujisawa

Inventor： Shinsuke Tsukagoshi ,  Yasuko Fujisawa

IPC: A61B6/03

CPC classification number: A61B6/032 ,  A61B6/481 ,  A61B6/504 ,  A61B6/507 ,  A61B6/5235 ,  Y10S378/901

Abstract: An X-ray tube generates X-rays. An X-ray detector detects X-rays generated from the X-ray tube and transmitted through an object to be examined. A rotating frame continuously rotates the X-ray tube and the X-ray detector around the object. A reconstruction unit reconstructs a plurality of first volume data sets with different scan times for the same scan area of the object on the basis of an output from the X-ray detector. An image processing unit generates single second volume data set corresponding to a maximum value, an average value, a median value, or minimum value of the plurality of reconstructed first volume data sets in the temporal direction.

Abstract translation: X射线管产生X射线。 X射线检测器检测从X射线管产生的X射线并透过待检测物体。 旋转架使X射线管和X射线检测器围绕物体旋转。 重建单元基于来自X射线检测器的输出，针对对象的相同扫描区域重建具有不同扫描时间的多个第一体数据集。 图像处理单元产生与时间方向上的多个重构的第一体积数据集的最大值，平均值，中值或最小值相对应的单个第二体积数据集。

公开(公告)号：US20100054571A1

公开(公告)日：2010-03-04

申请号：US12614933

申请日：2009-11-09

Applicant: Shinichi Kojima ,  Takashi Okazaki ,  Yuuichirou Ueno ,  Kikuo Umegaki ,  Kensuke Amemiya ,  Kazuhiro Takeuchi ,  Hiroshi Kitaguchi ,  Kazuma Yokoi ,  Norihito Yanagita

Inventor： Shinichi Kojima ,  Takashi Okazaki ,  Yuuichirou Ueno ,  Kikuo Umegaki ,  Kensuke Amemiya ,  Kazuhiro Takeuchi ,  Hiroshi Kitaguchi ,  Kazuma Yokoi ,  Norihito Yanagita

IPC: G06K9/00

CPC classification number: G01T1/1611 ,  A61B6/037 ,  A61B6/4241 ,  A61B6/5235 ,  G01N23/046 ,  G01N2223/419 ,  G01N2223/612 ,  G01T1/2985 ,  Y10S378/901

Abstract: A radiological imaging apparatus of the present invention comprises an image pickup device and a medical examinee holding device that is provided with a bed. The image pickup device includes a large number of radiation detectors and radiation detector support plates. A large number of radiation detectors are mounted around the circumference of a through-hole and arranged in the axial direction of the through-hole. The radiation detectors are arranged in three layers formed radially with respect to the center of the through-hole and mounted on the lateral surfaces of the radiation detector support plates. Since the radiation detectors are not only arranged in the axial direction and circumferential direction of the through-hole but also arrayed in the radial direction, it is possible to obtain accurate information about a γ-ray arrival position in the radial direction of the through-hole (the positional information about a radiation detector from which a γ-ray image pickup signal is output). The use of accurate information about γ-ray arrival increases the tomogram accuracy. As a result, the present invention enhances the tomogram accuracy, that is, the PET examination accuracy.

Abstract translation: 本发明的放射学成像装置包括：图像拾取装置和设有床的医疗检查者保持装置。 图像拾取装置包括大量的辐射检测器和辐射检测器支撑板。 大量的辐射探测器安装在通孔的圆周周围并沿通孔的轴向布置。 辐射检测器被布置成相对于通孔的中心径向形成的三层，并且安装在辐射检测器支撑板的侧表面上。 由于辐射检测器不仅沿通孔的轴向和圆周方向布置，而且沿径向排列，可以获得关于通孔的径向上的γ射线到达位置的准确信息， （关于从其输出γ射线摄像信号的放射线检测器的位置信息）。 使用关于γ射线到达的准确信息可以增加断层图像的准确性。 结果，本发明增强了断层图像精度，即PET检查精度。

公开(公告)号：US07664221B2

公开(公告)日：2010-02-16

申请号：US11377887

申请日：2006-03-17

Applicant: Herbert Bruder

Inventor： Herbert Bruder

IPC: A61B6/03

CPC classification number: A61B6/032 ,  A61B6/027 ,  A61B6/466 ,  A61B6/503 ,  G06T11/005 ,  G06T11/006 ,  G06T2211/412 ,  Y10S378/901

Abstract: A method and computed tomography unit are disclosed for producing computed tomograms of a patient's beating heart by voxelwise reconstruction of volume data records from prescribed cardiac cycle phases. Firstly, a multiplicity of voxelwise partial reconstructions are calculated from projection segments substantially smaller than 180° in accordance with small cardiac phase segments. The complete voxel data that cover overall at least 180° and originate from a preselected cardiac phase are subsequently summed up per cardiac phase to be considered from the pool of the incomplete reconstructed voxel data.

Abstract translation: 公开了一种方法和计算机断层摄影单元，用于通过从规定的心动周期阶段的体数据记录的体素重建来产生患者的跳动心脏的计算机断层图。 首先，根据小的心脏相位段，从基本上小于180°的投影段计算多个体素部分重建。 随后将总体至少180°并且来自预选心脏相的完整体素数据从每个心脏期总结出，以从不完全重建的体素数据池中考虑。

公开(公告)号：US07656991B2

公开(公告)日：2010-02-02

申请号：US11684157

申请日：2007-03-09

Applicant: Yu Zhou ,  Wu Li

Inventor： Yu Zhou ,  Wu Li

IPC: A61B6/03 ,  H05G1/60

CPC classification number: A61B6/04 ,  A61B6/027 ,  A61B6/583 ,  G06T11/006 ,  G06T2211/424 ,  Y10S378/901

Abstract: The present invention is intended to provide an image reconstruction method based on an iterative reconstruction technique and characterized by a short image reconstruction time, a small memory capacity, and high image quality. The image reconstruction method comprises the steps of: constructing a system model that has a plurality of concentric rings each segmented into a plurality of sectors; constructing a system matrix associated with one view, by using some of all the sectors constituting the system model, the some of all sectors being located on respective projection lines concerning the one view; creating a system matrix associated with another view, by transforming the system matrix associated with the one view; reconstructing an image through iterative reconstruction by using the system matrix and projection data; and transforming the image into an image composed of rectangular pixels.

Abstract translation: 本发明旨在提供一种基于迭代重建技术的图像重建方法，其特征在于短图像重建时间，小存储容量和高图像质量。 图像重建方法包括以下步骤：构建具有多个同心环的系统模型，每个同心环分成多个扇区; 通过使用构成系统模型的所有扇区中的一些构造与一个视图相关联的系统矩阵，所有扇区中的一些位于关于一个视图的相应投影线上; 通过转换与一个视图相关联的系统矩阵来创建与另一个视图相关联的系统矩阵; 通过使用系统矩阵和投影数据通过迭代重建来重建图像; 并将图像变换为由矩形像素构成的图像。

公开(公告)号：US07634048B2

公开(公告)日：2009-12-15

申请号：US12331299

申请日：2008-12-09

Applicant: Shinichi Kojima ,  Takashi Okazaki ,  Yuuichirou Ueno ,  Kikuo Umegaki ,  Kensuke Amemiya ,  Kazuhiro Takeuchi ,  Hiroshi Kitaguchi ,  Kazuma Yokoi ,  Norihito Yanagita

Inventor： Shinichi Kojima ,  Takashi Okazaki ,  Yuuichirou Ueno ,  Kikuo Umegaki ,  Kensuke Amemiya ,  Kazuhiro Takeuchi ,  Hiroshi Kitaguchi ,  Kazuma Yokoi ,  Norihito Yanagita

IPC: A61B6/00

CPC classification number: G01T1/1611 ,  A61B6/037 ,  A61B6/4241 ,  A61B6/5235 ,  G01N23/046 ,  G01N2223/419 ,  G01N2223/612 ,  G01T1/2985 ,  Y10S378/901

Abstract: A radiological imaging apparatus of the present invention comprises an image pickup device and a medical examinee holding device that is provided with a bed. The image pickup device includes a large number of radiation detectors and radiation detector support plates. A large number of radiation detectors are mounted around the circumference of a through-hole and arranged in the axial direction of the through-hole. The radiation detectors are arranged in three layers formed radially with respect to the center of the through-hole and mounted on the lateral surfaces of the radiation detector support plates. Since the radiation detectors are not only arranged in the axial direction and circumferential direction of the through-hole but also arrayed in the radial direction, it is possible to obtain accurate information about a γ-ray arrival position in the radial direction of the through-hole (the positional information about a radiation detector from which a γ-ray image pickup signal is output). The use of accurate information about γ-ray arrival increases the tomogram accuracy. As a result, the present invention enhances the tomogram accuracy, that is, the PET examination accuracy.

Abstract translation: 本发明的放射学成像装置包括：图像拾取装置和设有床的医疗检查者保持装置。 图像拾取装置包括大量的辐射检测器和辐射检测器支撑板。 大量的辐射探测器安装在通孔的圆周周围并沿通孔的轴向布置。 辐射检测器被布置成相对于通孔的中心径向形成的三层，并且安装在辐射检测器支撑板的侧表面上。 由于辐射检测器不仅沿着通孔的轴向方向和圆周方向布置，而且沿径向排列，可以获得关于通孔的径向方向上的伽马射线到达位置的准确信息， （关于从其输出伽马射线摄像信号的放射线检测器的位置信息）。 使用关于伽马射线到达的准确信息增加了断层图像的准确性。 结果，本发明增强了断层图像精度，即PET检查精度。

公开(公告)号：US07599464B2

公开(公告)日：2009-10-06

申请号：US11377671

申请日：2006-03-17

Applicant: Rainer Raupach ,  Otto Sembritzki

Inventor： Rainer Raupach ,  Otto Sembritzki

IPC: A61B6/03

CPC classification number: A61B6/032 ,  A61B6/466 ,  G06T11/005 ,  Y10S378/901

Abstract: A method and a computed tomography system are disclosed for producing computed tomograms of an object. A set of detector output data that represent beams over a specific angular range and a scan of a specific subregion of the object, are divided into m≧2 complete partial detector output data records that respectively cover the same complete angular range, but are reduced with their sampling density by 1/m and have mutually independent data records. Intermediate image data records (m records) that represent the identical object region are reconstructed from the m complete partial detector output data records. A correlation analysis is carried out between the m intermediate image data records. Finally, an image data record is produced that consists only of correlated data and includes no uncorrelated data.

Abstract translation: 公开了一种用于产生物体的计算机断层图的方法和计算机断层摄影系统。 一组检测器输出数据，表示特定角度范围内的波束和物体的特定子区域的扫描，分为m≥2个完全部分检测器输出数据记录，分别覆盖相同的完整角度范围，但是减少 采样密度为1 / m，具有相互独立的数据记录。 从m个完全部分检测器输出数据记录重构表示相同对象区域的中间图像数据记录（m记录）。 在m个中间图像数据记录之间进行相关分析。 最后，产生仅由相关数据组成的图像数据记录，并且不包括不相关的数据。

公开(公告)号：US07590273B2

公开(公告)日：2009-09-15

申请号：US11398099

申请日：2006-04-04

Applicant: Toshiro Kubota ,  Kazunori Okada

Inventor： Toshiro Kubota ,  Kazunori Okada

IPC: G06K9/00

CPC classification number: G06K9/44 ,  G06K2209/053 ,  G06T7/0012 ,  G06T7/12 ,  G06T7/149 ,  G06T7/62 ,  G06T2207/10081 ,  G06T2207/20116 ,  G06T2207/30064 ,  Y10S378/901

Abstract: A method for estimating a diameter of an object of interest, includes extracting a sub-volume of voxels around a marker identifying a location of the object of interest, and determining a segmentation result identifying an edge of the object of interest by a reactive-diffusion method. The method further includes performing a boundary check on the segmentation result to determine whether the object of interest is solitary, estimating a diameter of the object of interest from the segmentation result upon determining the object of interest to be solitary, and extracting the object of interest by performing ellipsoid fit on the sub-volume and estimating a diameter of the object of interest upon determining the object of interest to be non-solitary.

Abstract translation: 一种用于估计感兴趣对象的直径的方法，包括提取识别感兴趣对象的位置的标记周围的体素的子体积，以及通过反应扩散来确定识别感兴趣对象的边缘的分割结果 方法。 所述方法还包括对所述分割结果执行边界检查以确定所述感兴趣对象是否是孤立的，在确定感兴趣的对象是单独的时，从所述分割结果估计所述对象的直径，以及提取所述感兴趣的对象 通过在子体积上执行椭圆体拟合并且在确定感兴趣的对象是非孤立性时估计感兴趣对象的直径。

公开(公告)号：US07590216B2

公开(公告)日：2009-09-15

申请号：US11581160

申请日：2006-10-13

Applicant: Alexander Katsevich

Inventor： Alexander Katsevich

IPC: A61B6/03

CPC classification number: G01N23/046 ,  A61B6/027 ,  A61B6/032 ,  G01N2223/419 ,  G06T11/006 ,  G06T2211/416 ,  G06T2211/421 ,  Y10S378/901

Abstract: Methods, systems and processes for providing efficient image reconstruction using local cone beam tomography which provide a reduced level of artifacts without suppressing the strength of the useful features; and in a dynamic case provide reconstruction of objects that are undergoing a change during the scan. An embodiment provides a method of reconstructing an image from cone beam data provided by at least one detector. The method includes collecting CB projection data of an object, storing the CB projection data in a memory; and reconstructing the image from the local CB projection data. In the reconstructing step, a combination of derivatives of the CB projection data that will result in suppressing the artifacts are found. The combination of derivatives includes collecting cone beam data that represents a collection of integrals that represent the object.

Abstract translation: 用于使用局部锥束断层摄影提供有效图像重建的方法，系统和过程，其提供减少的伪影水平而不抑制有用特征的强度; 并且在动态情况下提供在扫描期间正在经历改变的对象的重建。 实施例提供了一种由至少一个检测器提供的锥束数据重构图像的方法。 该方法包括收集对象的CB投影数据，将CB投影数据存储在存储器中; 并从本地CB投影数据重建图像。 在重建步骤中，发现将导致抑制伪像的CB投影数据的导数的组合。 衍生物的组合包括收集表示该物体的积分集合的锥形束数据。

公开(公告)号：US07570742B2

公开(公告)日：2009-08-04

申请号：US10615569

申请日：2003-07-07

Applicant: Steven A. Johnson ,  David T. Borup ,  James Wiskin ,  Michael J. Berggren

Inventor： Steven A. Johnson ,  David T. Borup ,  James Wiskin ,  Michael J. Berggren

IPC: G01N23/00

CPC classification number: G06T11/006 ,  A61B5/05 ,  A61B5/0507 ,  A61B5/4312 ,  A61B5/7257 ,  A61B8/0825 ,  A61B8/14 ,  A61B8/15 ,  A61B8/406 ,  A61B8/4209 ,  A61B8/4483 ,  A61B8/485 ,  G01H3/125 ,  G01N22/00 ,  G01N23/2055 ,  G01S13/103 ,  G01S13/89 ,  G01S15/04 ,  G01S15/88 ,  G01S15/89 ,  G01S15/8909 ,  G01S15/8913 ,  G01S15/8929 ,  G01S15/8938 ,  G01S15/895 ,  G01S15/8977 ,  G01S15/96 ,  G01V1/003 ,  G06T2211/408 ,  G06T2211/424 ,  Y10S378/901

Abstract: This invention describes a method for increasing the speed of the parabolic marching method by about a factor of 256. This increase in speed can be used to accomplish a number of important objectives. Firstly, the speed can be used to collect data to form true 3-D images or 3-D assembled from 2-D slices. Speed allows larger images to be made. Secondly, the frequency of operation can be increased to 5 MHz to match the operating frequency of reflection tomography. This allow the improved imaging of speed of sound which in turn is used to correct errors in focusing delays in reflection tomography imaging. This allows reflection tomography to reach or closely approach its theoretical spatial resolution of ½ to ¾ wave lengths. A third benefit of increasing the operating frequency of inverse scattering to 5 MHz is the improved out of topographic plane spatial resolution. This improves the ability to detect small lesions. It also allow the use of small transducers and narrower beams so that slices can be made closer to the chest wall.

公开(公告)号：US07548603B2

公开(公告)日：2009-06-16

申请号：US10534158

申请日：2003-11-03

Applicant: Claas Bontus ,  Thomas Köhler

Inventor： Claas Bontus ,  Thomas Köhler

IPC: A61B6/03

CPC classification number: G06T11/006 ,  A61B6/027 ,  G06T2211/416 ,  G06T2211/421 ,  Y10S378/901

Abstract: The invention relates to a computed tomography method in which an examination zone is irradiated along a helical trajectory by a conical radiation beam. The radiation transmitted by the examination zone is measured by means of a detector unit and therefrom the absorption distribution in the examination zone is reconstructed without approximations. The reconstruction comprises a derivation of the measuring values of parallel rays of different projections, an integration of these values along K lines, a weighting of these values and a back projection.

Abstract translation: 本发明涉及一种计算机断层摄影方法，其中通过锥形辐射束沿着螺旋轨迹照射检查区。 通过检测器单元测量由检查区传输的辐射，并且由此重建检查区中的吸收分布而不进行近似。 重构包括不同投影的平行光线的测量值的推导，这些值沿K线的积分，这些值的加权和反投影。