公开(公告)号：US06463115B1

公开(公告)日：2002-10-08

申请号：US09636288

申请日：2000-08-10

申请人： Tetsuya Horiuchi

发明人： Tetsuya Horiuchi

IPC分类号： A61B603

CPC分类号： A61B6/032 ,  Y10S378/901

摘要： In order to provide a projection data correction method and apparatus that prevents artifact generation in the direction which provides a low count of penetrating radiation, and a radiation tomographic imaging method employing such a projection data correction method and a radiation tomographic imaging apparatus comprising the projection data correction apparatus, projection data Proj_ij is individually corrected by a weighted addition (604, 606, 608) with an average value (602) containing the proximate data. The weight SGij of the projection data is decreased as the count of the penetrating radiation from which the projection data is derived becomes smaller.

摘要翻译： 为了提供一种防止在提供较低穿透辐射量的方向上产生伪影的投影数据校正方法和装置，以及采用这种投影数据校正方法的放射线断层成像方法和包括投影数据的放射线断层成像装置 校正装置通过具有包含邻近数据的平均值（602）的加权相加（604,606,608）来单独校正投影数据Proj_ij。 投影数据的重量SGij随着导出投影数据的穿透辐射的计数而减小。

公开(公告)号：US6067341A

公开(公告)日：2000-05-23

申请号：US158032

申请日：1998-09-22

申请人： Tetsuya Horiuchi

发明人： Tetsuya Horiuchi

IPC分类号： A61B6/03 ,  A61B6/00

CPC分类号： A61B6/488 ,  A61B6/032 ,  Y10S378/901

摘要： In order for image data pixel value ranges for several slices to be contained within the same preferred range, an x-ray computed tomography method and apparatus comprises an x-ray source 2 for emitting x-rays toward a subject, an x-ray detector 3 for detecting subject transmission information of the emitted x-rays and control means 15 for controlling the x-ray emission and detection, wherein the control means exerts the control so as to, prior to the tomographic imaging of the subject, produce scout images by fixing the angular position of the x-ray source at two different angular positions and performing the scout imaging of the subject respectively at the angular positions; calculates a scanning condition with reference to the standard deviation of image data based on the area of projection display data, a desired standard deviation of the image data and the pixel value attenuation ratio between the scout images acquired respectively at the two angular positions of the x-ray source; and exerts the control so as to perform the tomographic imaging according to the scanning condition.

摘要翻译： 为了将数个切片的图像数据像素值范围包含在相同的优选范围内，x射线计算机断层摄影方法和装置包括用于朝向对象发射x射线的x射线源2，X射线检测器 3，用于检测所发射的X射线的被摄体发射信息和用于控制x射线发射和检测的控制装置15，其中控制装置进行控制，以便在被摄体的断层成像之前，通过以下方式产生侦察图像： 将X射线源的角度位置固定在两个不同的角度位置，并分别在角位置执行对象的侦察成像; 基于投影显示数据的面积，图像数据的期望标准偏差和分别在x的两个角位置获取的侦察图像之间的像素值衰减率来计算扫描条件，参考图像数据的标准偏差 来源 并执行控制以便根据扫描条件执行断层图像成像。

公开(公告)号：US5590165A

公开(公告)日：1996-12-31

申请号：US335772

申请日：1994-11-09

申请人： Makoto Gohno ,  Tetsuya Horiuchi

发明人： Makoto Gohno ,  Tetsuya Horiuchi

IPC分类号： A61B6/00 ,  A61B6/03 ,  A61B10/00 ,  G06T5/00

CPC分类号： G06T7/0081 ,  A61B5/4872 ,  A61B6/032 ,  A61B6/4035 ,  A61B6/405 ,  A61B6/482 ,  A61B6/583 ,  G06T7/0012 ,  G06F19/321 ,  G06F19/3487 ,  G06T2207/10081 ,  G06T2207/30004 ,  Y10S378/901

摘要： A method of generating an image representing fat distributions, comprising the steps of scanning two different levels of tube voltage using a phantom containing a sample rod of a fat standard material and a plurality of sample rods with different densities of a bone mineral equivalent material, to generate two cross sectional image data; detecting the CT number of each pixel in an entire region or an objective region of the cross sectional image data as the CT number of a tissue including fat (.alpha.wf); detecting the CT number of the bone mineral equivalent material to calculate a linear regression between the CT number and the density of the bone mineral equivalent material and to define the CT number of a tissue excluding fat (.alpha.nf); detecting the CT number of the fat standard material (.alpha.ff), while detecting the CT number of a soft tissue standard material (.alpha.st), wherein individual CT numbers are applied to the equation.alpha.wf=.alpha.nf+.beta..multidot.(.alpha.ff-.alpha.st)with .beta. defined as a fat ratio parameter; calculating the fat ratio parameter .beta. of each pixel in the entire region or an objective region of the cross sectional image data using the foregoing equation, with attention focused on the finding that the density of the bone mineral equivalent material is constant at scanning at any different level of tube voltage, and finally generating an image based on the fat ratio parameter .beta..

摘要翻译： PCT No.PCT / JP93 / 00696 Sec。 371日期：1994年11月9日 102（e）1994年11月9日日期PCT提交1993年5月25日PCT公布。 出版物WO93 / 24054 日期1993年12月9日一种产生代表脂肪分布的图像的方法，包括以下步骤：使用包含脂肪标准材料的样品棒的体模和具有不同密度的骨的多个样品棒来扫描两个不同级别的管电压 矿物当量材料，产生两个截面图像数据; 检测横截面图像数据的整个区域或目标区域中的每个像素的CT数作为包括脂肪（αwf）的组织的CT数; 检测骨矿物当量材料的CT数，以计算CT数和骨矿物当量材料的密度之间的线性回归，并定义不包括脂肪（αnf）的组织的CT数; 检测脂肪标准物质的CT数（αff），同时检测软组织标准物质（αst）的CT数，其中各个CT数应用于方程αwf =αnf +βx（αff- αst），β被定义为脂肪比参数; 使用上述等式计算整个区域或横截面图像数据的每个像素的每个像素的脂肪比参数β，注意力集中在以下发现：骨矿物当量材料的密度在任何不同的扫描处是恒定的 管电压水平，最后根据脂肪比参数β生成图像。

公开(公告)号：US4963624A

公开(公告)日：1990-10-16

申请号：US307629

申请日：1989-02-07

申请人： Kozo Ida ,  Tetsuya Horiuchi

发明人： Kozo Ida ,  Tetsuya Horiuchi

IPC分类号： B29C47/00 ,  C08F257/02 ,  C08F265/06

CPC分类号： C08F265/06 ,  C08F257/02 ,  B29C47/00 ,  B29C47/0019

摘要： A process for producing a light diffusing methacrylic resin article consisting essentially of a substrate polymer and crosslinked polymer beads having an average particle diameter of 1-16 .mu.m dispersed therein, the difference between the refractive indexes of the crosslinked polymer beads and the substrate polymer being 0.02-0.15, which comprises compounding the crosslinked polymer beads with:(A) methyl methacrylate or a mixture of a major amount thereof with a minor amount of at least one comonomer;(B) at least one monomer which can form a polymer compatible with the polymer obtained from (A); or(C) a polymer-in-monomer solution obtained by partially polymerizing either the (A) monomer or the (B) monomer,to swell the beads until a degree of swelling of from 120% to 1,500% is reached, and subjecting the resulting mixture to polymerization to obtain a light diffusing polymer and molding the polymer alone or in combination with a methacrylic resin, the main monomer unit of which is methyl methacrylate to a desired shape. The article obtained has a good balance between brightness and maximum bend angle, has such an opacity that a light source is not seen through the article and has a good appearance.

摘要翻译： 用于制造基本上由基材聚合物和平均粒径为1-16μm的交联聚合物珠粒组成的光漫射甲基丙烯酸树脂制品的方法，交联聚合物珠粒和基材聚合物的折射率之间的差异为 0.02-0.15，其包括将交联聚合物珠粒与（A）甲基丙烯酸甲酯或其主要量与少量至少一种共聚单体的混合物混合; （B）至少一种可与由（A）获得的聚合物相容的聚合物形成的单体; 或（C）通过部分聚合（A）单体或（B）单体而获得的聚合物 - 单体溶液，使珠粒溶胀，直至达到120〜1500％的溶胀度，并使 得到混合物以获得光漫射聚合物，并单独模塑聚合物或与主要单体单元为甲基丙烯酸甲酯的甲基丙烯酸树脂组合成所需形状。 所获得的制品在亮度和最大弯曲角度之间具有良好的平衡，具有通过制品不能看到光源并具有良好外观的不透明度。

公开(公告)号：US07502439B2

公开(公告)日：2009-03-10

申请号：US11474764

申请日：2006-06-26

申请人： Tetsuya Horiuchi ,  Junko Sekiguchi

发明人： Tetsuya Horiuchi ,  Junko Sekiguchi

IPC分类号： G21K1/12

CPC分类号： A61B6/545 ,  A61B6/032 ,  A61B6/488 ,  G01N23/046 ,  G01N2223/419 ,  G01N2223/612

摘要： To enable radiation rays to be efficiently used. A scout scan parameter setting unit sets a rotation movement position to which an X-ray tube and an X-ray detector are moved so as to rotate around a subject on the basis of subject information of a subject on which a scout scan is performed at the time of performing a scout scan. At the time of starting execution of the scout scan, a rotating unit moves the X-ray tube and the X-ray detector so as to rotate around the subject to the rotation movement position which is set by the scout scan parameter setting unit. After that, a scout scan is performed in the rotation movement position.

摘要翻译： 使辐射线得到有效利用。 侦察扫描参数设定部基于在其上进行侦察扫描的被摄体的被摄体信息来设定移动X射线管和X射线检测器的旋转移动位置，以围绕被检体旋转 执行侦察扫描的时间。 在开始执行侦察扫描时，旋转单元将X射线管和X射线检测器移动到围绕被摄体旋转的扫描参数设定单元设定的旋转移动位置。 之后，在旋转运动位置进行侦察扫描。

公开(公告)号：US20090028288A1

公开(公告)日：2009-01-29

申请号：US12179918

申请日：2008-07-25

申请人： Tetsuya Horiuchi ,  Satoru Nakanishi ,  Naruomi Akino

发明人： Tetsuya Horiuchi ,  Satoru Nakanishi ,  Naruomi Akino

IPC分类号： A61B6/00

CPC分类号： A61B6/032 ,  G06T11/006 ,  G06T2211/421 ,  G06T2211/432

摘要： An X-ray computed tomography apparatus includes a gantry, a reconstruction processing unit which generates first volume data on the basis of a projection data set which covers an angle range of 180°±a fan angle and also generates second volume data on the basis of a projection data set which covers an angle range of 360°, a correction data generating unit which generates correction data for reducing a cone beam artifact on the basis of a difference between the first volume data and the second volume data, and a correction unit which corrects the first volume data on the basis of the correction data.

摘要翻译： 一种X射线计算机断层摄影装置，包括台架，重建处理单元，其基于覆盖角度范围为180度±扇形角的投影数据集生成第一体积数据，并且还基于 覆盖360°的角度范围的投影数据组;校正数据生成单元，其基于第一体积数据和第二体数据之间的差产生用于减少锥形束伪像的校正数据;以及校正单元， 基于校正数据校正第一卷数据。

公开(公告)号：US20060291614A1

公开(公告)日：2006-12-28

申请号：US11474764

申请日：2006-06-26

申请人： Tetsuya Horiuchi ,  Junko Sekiguchi

发明人： Tetsuya Horiuchi ,  Junko Sekiguchi

IPC分类号： H05G1/60 ,  A61B6/00 ,  G01N23/00 ,  G21K1/12

CPC分类号： A61B6/545 ,  A61B6/032 ,  A61B6/488 ,  G01N23/046 ,  G01N2223/419 ,  G01N2223/612

摘要： To enable radiation rays to be efficiently used. A scout scan parameter setting unit sets a rotation movement position to which an X-ray tube and an X-ray detector are moved so as to rotate around a subject on the basis of subject information of a subject on which a scout scan is performed at the time of performing a scout scan. At the time of starting execution of the scout scan, a rotating unit moves the X-ray tube and the X-ray detector so as to rotate around the subject to the rotation movement position which is set by the scout scan parameter setting unit. After that, a scout scan is performed in the rotation movement position.

摘要翻译： 使辐射线得到有效利用。 侦察扫描参数设定部基于在其上进行侦察扫描的被摄体的被摄体信息来设定移动X射线管和X射线检测器的旋转移动位置，以围绕被检体旋转 执行侦察扫描的时间。 在开始执行侦察扫描时，旋转单元将X射线管和X射线检测器移动到围绕被摄体旋转的扫描参数设定单元设定的旋转移动位置。 之后，在旋转运动位置进行侦察扫描。

公开(公告)号：US07082181B2

公开(公告)日：2006-07-25

申请号：US11124946

申请日：2005-05-09

申请人： Akihiko Nishide ,  Tetsuya Horiuchi

发明人： Akihiko Nishide ,  Tetsuya Horiuchi

IPC分类号： A61B6/00

CPC分类号： G06T5/002 ,  G06T5/50 ,  G06T11/005 ,  G06T11/008 ,  G06T2207/10081 ,  G06T2207/30004 ,  Y10S378/901

摘要： A method for reconstructing an image that can be recognized stably during CAD. The method for reconstructing an image on the basis of a plurality of views of projection data items provided by X-rays having passed through a subject includes image reconstruction dedicated to a computer-aided detection (CAD) mode. The image reconstruction comprises a reconstruction function dedicated to the CAD mode, includes pre-processing that includes a noise removal filter for removing a noise from projection data, such as, a streaky artifact removal dedicated to the CAD mode, and also includes post-processing that includes a noise removal filter dedicated to the CAD mode.

摘要翻译： 一种用于重建可在CAD中稳定识别的图像的方法。 基于通过被摄体的X射线提供的投影数据项的多个视图来重建图像的方法包括专用于计算机辅助检测（CAD）模式的图像重建。 图像重建包括专用于CAD模式的重建功能，包括预处理，包括用于从投影数据去除噪声的噪声去除滤波器，例如专用于CAD模式的条纹伪像去除，并且还包括后处理 其包括专用于CAD模式的噪声去除滤波器。

公开(公告)号：US20050175139A1

公开(公告)日：2005-08-11

申请号：US11049177

申请日：2005-02-02

申请人： Tetsuya Horiuchi ,  Kotoko Morikawa

发明人： Tetsuya Horiuchi ,  Kotoko Morikawa

IPC分类号： A61B6/03 ,  G06T1/00 ,  G06T11/00 ,  G21K1/12 ,  A61B6/00 ,  G01N23/00 ,  H05G1/60

CPC分类号： G06T11/006

摘要： An image reconstructing method includes upon reconstructing an image using a multi-row detector having a plurality of detector sequences and on the basis of projection data D0 collected by a helical scan with a scan surface being tilted effecting, on the projection data, a tilt correcting process for correcting variations on every view, in positions of respective channels of the detector sequences with respect to a linear travel axis due to the inclination of the scan surface, projecting respective pixels in an X-ray penetration direction along lines parallel to an X axis or a Y axis on a reconstruction plane to determine the corresponding projection data and defining the same as backprojected pixel data of respective pixels constituting the reconstruction plane, and adding the backprojected pixel data of all views used in image reconstruction in association with the pixels to determine backprojected data.

摘要翻译： 一种图像重建方法包括：使用具有多个检测器序列的多行检测器重建图像，并且基于通过具有倾斜影响的扫描表面的螺旋扫描收集的投影数据D 0在投影数据上的倾斜 根据扫描表面的倾斜，检测器序列相对于线性行进轴的各个通道的位置校正各个视图的变化的校正处理，沿与X平行的线沿着X射线穿透方向突出各个像素 轴或Y轴，以确定对应的投影数据并将其定义为构成重建平面的各个像素的反投影像素数据，并将与像素相关联的图像重建中使用的所有视图的反投影像素数据相加 确定反投影数据。

公开(公告)号：US20050008116A1

公开(公告)日：2005-01-13

申请号：US10885189

申请日：2004-07-06

申请人： Akihiko Nishide ,  Tetsuya Horiuchi ,  Akira Hagiwara

发明人： Akihiko Nishide ,  Tetsuya Horiuchi ,  Akira Hagiwara

IPC分类号： A61B6/03 ,  G21K1/12 ,  A61B6/00 ,  G01N23/00 ,  H05G1/60

CPC分类号： A61B6/032 ,  A61B6/027

摘要： An object of the present invention is to utilize a distance, which is linearly moved for acceleration or deceleration, out of an overall distance linearly moved during a helical scan for the purpose of image reconstruction. Projection data is acquired even during acceleration or deceleration of linear movement made for a helical scan. The acquired projection data is utilized for image reconstruction. Moreover, during the acceleration of linear movement, while a tube current is being increased, projection data is acquired. During the deceleration of linear movement, while the tube current is being decreased, projection data is acquired.

摘要翻译： 为了图像重构的目的，本发明的目的是利用在螺旋扫描过程中线性移动的整个距离内的加速或减速线性移动的距离。 甚至在进行螺旋扫描的线性运动的加速或减速期间也获取投影数据。 获取的投影数据被用于图像重建。 此外，在线性运动的加速期间，当管电流增加时，获取投影数据。 在线性运动减速期间，当管电流减小时，获取投影数据。