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    • 41. 发明申请
    • X-Ray Ct Apparatus
    • X射线照射装置
    • US20080107231A1
    • 2008-05-08
    • US11884099
    • 2006-02-27
    • Osamu MiyazakiKoichi HirokawaToshiyuki Irie
    • Osamu MiyazakiKoichi HirokawaToshiyuki Irie
    • G01N23/00G06K9/00
    • A61B6/032A61B6/542
    • In an X-ray CT apparatus comprising an X-ray source irradiating X-rays to an object, an X-ray detector that is disposed oppositely to the X-ray source in a manner placing the object therebetween and is to detect transmitting X-rays through the object as projection data, a rotating means that rotates the X-ray source and the X-ray detector, a control means that collects the projection data from plural angular directions obtained through rotation of the X-ray tube and the X-ray detector by the rotating means, performs reconstruction computation of these collected projection data to produce tomographic images of the object as well as controls the X-ray source and the rotating means and a display means that displays the produced tomographic images, the X-ray CT apparatus further comprising a projection data analysis means that reconstructs a tomographic image at an imaging portion of the object used for analysis from the projection data and produces a control profile by reprojecting the reconstructed tomographic image and a tube current control means that controls value of current to be fed to the X-ray tube based on the produced control profile.
    • 在包括对物体照射X射线的X射线源的X射线CT装置中,X射线检测器以与放射对象物的方式相对地设置在X射线源的X射线CT装置之间, 通过物体作为投射数据的光线,使X射线源和X射线检测器旋转的旋转装置,控制装置,其通过X射线管和X射线检测器的旋转而获得的多个角度方向收集投影数据, 通过旋转装置执行这些收集的投影数据的重建计算,以产生对象的断层图像,并且控制X射线源和旋转装置,以及显示装置,其显示所产生的断层图像,X射线 CT装置还包括投影数据分析装置,用于根据投影数据在用于分析的对象的成像部分处重建断层图像,并通过重新投影re来产生控制简档 构造的断层图像和管电流控制装置,其基于所产生的控制轮廓来控制要供给到X射线管的电流的值。
    • 42. 发明申请
    • X-Ray Ct Scanner
    • X射线扫描仪
    • US20070297562A1
    • 2007-12-27
    • US10587171
    • 2005-01-17
    • Yasutaka KonnoOsamu Miyazaki
    • Yasutaka KonnoOsamu Miyazaki
    • G01N23/083
    • A61B6/032A61B6/585
    • Provided is an X-ray CT scanner that minimizes or removes artifacts in an image derived from afterglow caused by a detector, and highly precisely prevent degradation in a time resolution by compensating afterglow. An X-ray CT scanner includes an X-ray source that irradiates X-rays to an object, an X-ray detector that is composed of a plurality of X-ray detecting elements which convert X-rays penetrating the object into electric signals, a data correction means that corrects an output of the X-ray detector, and an arithmetic processing means that performs arithmetic processing on an output of the data correction means so as to reconstruct an image. The X-ray CT scanner further includes a first memory means in which data of the response characteristic of the X-ray detector that is the afterglow-related characteristic thereof and that is measured in advance is stored, and a second memory means in which output data items produced by the X-ray detector over past projections and corrected by the data correction means on the basis of the response characteristic data are stored. The data correction means includes an afterglow correction means that uses the response characteristic data stored in the first memory means and the output data items, which are produced over past projections and stored in the second memory means, to compensate an adverse effect of inflow of signals from the past projections due to the after glow on output data acquired during current projection, and an adverse effect of outflow of signals to future projections.
    • 提供了一种X射线CT扫描器,其最小化或去除由检测器引起的余辉中产生的伪影,并通过补偿余辉高度精确地防止时间分辨率的劣化。 X射线CT扫描器包括将X射线照射到物体的X射线源,由将穿透物体的X射线转换为电信号的多个X射线检测元件构成的X射线检测器, 校正X射线检测器的输出的数据校正装置,以及对数据校正装置的输出执行算术处理以重建图像的算术处理装置。 X射线CT扫描器还包括第一存储装置,其中存储作为其余辉相关特性的X射线检测器的响应特性的数据并且被预先测量;第二存储装置,其中输出 存储由X射线检测器过去投影产生的数据项,并根据响应特征数据由数据校正装置校正数据项。 数据校正装置包括余辉校正装置,该余辉校正装置使用存储在第一存储装置中的响应特性数据和在过去的投影中产生并存储在第二存储装置中的输出数据项,以补偿信号的流入的不利影响 由于在当前投影期间获得的输出数据上的辉光后的过去投影,以及信号向未来预测的流出的不利影响。
    • 43. 发明申请
    • Image Processing Device and Method
    • 图像处理装置及方法
    • US20070230760A1
    • 2007-10-04
    • US11596231
    • 2005-05-17
    • Yasuo OmiOsamu MiyazakiTsuyoshi Mitake
    • Yasuo OmiOsamu MiyazakiTsuyoshi Mitake
    • G06K9/00
    • G06T5/003G06T5/002G06T5/20G06T2207/10116G06T2207/20192G06T2207/20221G06T2207/30016
    • An image processing device according to the present invention which includes image creating means for creating each of a smoothened image and a sharpened image with respect to at least a part of image data, and mixed image creating means for mixing the smoothened image and the sharpened image created by the image creating means to create a mixed image, including: analysis quantity calculating means for calculating an analysis quantity on plural pixel values in each matrix that surrounds each pixel of the image data and has any matrix size; control means for controlling the mixing ratio between the smoothened image and the sharpened image in the mixed image creating means in accordance with the analysis quantity calculated by the analysis quantity calculating means; and display means for displaying the mixed image that is controlled by the control means and output from the mixed image generating means.
    • 根据本发明的图像处理装置,包括:图像生成装置,用于创建相对于图像数据的至少一部分的平滑图像和锐化图像;以及混合图像创建装置,用于混合平滑图像和锐化图像 由图像创建装置创建以创建混合图像,包括:分析数量计算装置,用于计算围绕图像数据的每个像素的每个矩阵中的多个像素值的分析量,并且具有任何矩阵尺寸; 控制装置,用于根据由分析量计算装置计算出的分析量来控制混合图像生成装置中的平滑图像和锐化图像之间的混合比; 以及显示装置,用于显示由控制装置控制并从混合图像产生装置输出的混合图像。
    • 45. 发明申请
    • X-ray ct apparatus, x-ray ct apparatus afterglow correction method, and afterglow correction program
    • X射线ct装置,x射线ct装置余辉校正方法和余辉校正程序
    • US20050036582A1
    • 2005-02-17
    • US10488153
    • 2002-08-29
    • Takayuki NagaokaOsamu Miyazaki
    • Takayuki NagaokaOsamu Miyazaki
    • G01T1/161A61B6/00A61B6/03G01T1/164G21K1/12G01N23/00H05G1/60
    • A61B6/583A61B6/032Y10S378/901
    • An X-ray CT apparatus including an X-ray source for applying X-rays to an object, an X-ray detector arranged to face the X-ray source for determining the amount of transmitted X-rays of the object as projection data, basic-data acquisition means for acquiring response data of the projection data as basic data with no object present in advance every time the image of the object is acquired, analyzing means for analyzing an afterglow component of the acquired basic data into a plurality of time constants and their component ratios, storage means for storing the analyzed time constants and component ratios, correcting means for extracting an afterglow component of the projection data on the basis of the stored time constants and component ratios during radiography of the object and removing the extracted afterglow component of the projection data from the projection data to produce corrected projection data, reconstructing means for reconstructing an image using the produced corrected projection data, and display means for displaying the reconstructed image.
    • 一种X射线CT装置,包括:X射线源,用于向物体施加X射线; X射线检测器,被配置为面对X射线源,用于确定物体的透射X射线的量作为投影数据, 基本数据获取装置,用于在每次获取对象的图像时获取投影数据的响应数据作为基本数据,而不需要提前存在对象;分析装置,用于将获取的基本数据的余辉分量分析成多个时间常数 以及它们的分量比,用于存储所分析的时间常数和分量比的存储装置,用于根据所存储的时间常数和对象的放射线照相时的分量比,提取投影数据的余辉分量的校正装置,以及去除提取的余辉分量 从所述投影数据输出投影数据以产生校正投影数据;重构装置,用于使用所产生的校正后的重建图像 检查数据和用于显示重建图像的显示装置。