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    X-ray CT scanner and method of collecting image data in the same
    7.
    发明授权
    X-ray CT scanner and method of collecting image data in the same 失效
    X射线CT扫描仪及采集图像数据的方法

    公开(公告)号：US5528644A

    公开(公告)日：1996-06-18

    申请号：US377351

    申请日：1995-01-24

    申请人： Yukihiro Ogawa ,  Yusuke Toki

    发明人： Yukihiro Ogawa ,  Yusuke Toki

    IPC分类号： A61B6/03

    CPC分类号： A61B6/035 ,  A61B6/583 ,  Y10S378/901

    摘要： In an X-ray CT scanner, a first field of view corresponding to a reconstructed area of an image to be displayed is set. An original image data are reconstructed on the basis of a plurality of projection data in a patient in response to the first field of view. Whether or not an imaged region in the patient is larger than the first field of view is judged according to referring the original image data. A second field of view including the imaged region wholly is set in case that the imaged region is larger in area than the first field of view. Beam hardening correction data are produced on the basis of the projection data in the second field of view. The projection data are processed into the image corresponding to the first field of view with an aid of the correction data.

    摘要翻译： 在X射线CT扫描仪中，设置与要显示的图像的重建区域对应的第一视场。 响应于第一视场，基于患者中的多个投影数据重建原始图像数据。 根据原始图像数据来判断患者的成像区域是否大于第一视场。 在成像区域的面积大于第一视野的情况下，设置包括成像区域的第二视场。 基于第二视野中的投影数据产生光束硬化校正数据。 借助于校正数据，将投影数据处理成对应于第一视场的图像。

    Method and apparatus for specifying slice planes in X-ray computed tomography
    8.
    发明授权
    Method and apparatus for specifying slice planes in X-ray computed tomography 失效
    用于指定X射线计算机图像中的细胞平面图的方法和装置

    公开(公告)号：US5218623A

    公开(公告)日：1993-06-08

    申请号：US791175

    申请日：1991-11-13

    申请人： Yusuke Toki ,  Makoto Hayashibara

    发明人： Yusuke Toki ,  Makoto Hayashibara

    IPC分类号： G01N23/04 ,  A61B6/03 ,  H04N7/18

    CPC分类号： A61B6/032 ,  A61B6/4085 ,  A61B6/469 ,  A61B6/027

    摘要： A method and an apparatus for specifying slice planes in an X-ray CT, capable of specifying a slice plane corresponding to the desired tomographic image easily and accurately. In the apparatus, scans of the body to be examined are carried out and the projection data stored in the large capacity memory first. Then, a scanogram of the body to be examined is displayed, on which a cursor is controlled in order to specify the desired slice planes corresponding to the desired tomographic images to be reconstructed. Then, the desired tomographic images are reconstructed for the desired slice planes indicated by the cursor by using an appropriate part of the projection data stored in the memory which corresponds to the desired slice planes indicated by the cursor. Either one of the helical scan and the multi-scan can be used for collecting the data to obtain the scanogram and the tomographic images.

    Method and apparatus for helical scan imaging in X-ray computed tomography
    9.
    发明授权
    Method and apparatus for helical scan imaging in X-ray computed tomography 失效
    X线计算机断层扫描中螺旋扫描成像的方法和装置

    公开(公告)号：US5499283A

    公开(公告)日：1996-03-12

    申请号：US371789

    申请日：1995-01-12

    申请人： Yusuke Toki

    发明人： Yusuke Toki

    IPC分类号： A61B6/03 ,  A61B6/04 ,  G06T11/00 ,  G21K1/04

    CPC分类号： A61B6/032 ,  A61B6/027 ,  A61B6/0457 ,  G06T11/005 ,  G06T2211/432

    摘要： A method and a apparatus for helical scan imaging in an X-ray CT, in which the initial set up operation can be achieved easily and accurately. In this X-ray CT apparatus, relative motion of a bed plate and an X-ray source is automatically controlled according to a desired imaging region specified by the operator such that the bed plate and the X-ray source are relatively moved through a distance covered by a scanning region appropriate for collecting the data required to reconstruct tomographic images for the desired imaging region. The scanning region includes the desired imaging region and supplementary interpolation data regions, located at the ends of the desired imaging region and utilized in carrying out interpolations for deriving data in the desired imaging region, and initial acceleration region accounting an initial acceleration of the bed plate, and a final deceleration region accounting a final deceleration of the bed plate.

    摘要翻译： 一种用于X射线CT中的螺旋扫描成像的方法和装置，其中可以容易且精确地实现初始设置操作。 在该X射线CT装置中，床板和X射线源的相对运动根据由操作者指定的期望的成像区域自动控制，使得床板和X射线源相对移动一定距离 由适于收集为所需成像区域重建断层图像所需的数据的扫描区域覆盖。 扫描区域包括位于所需成像区域的末端的所需成像区域和辅助插值数据区域，并用于执行用于导出所需成像区域中的数据的内插以及计算床板初始加速度的初始加速区域 以及最终减速区域来计算床板的最终减速度。

    Method and apparatus for helical scan imaging in X-ray computed tomography
    10.
    发明授权
    Method and apparatus for helical scan imaging in X-ray computed tomography 失效
    X线计算机断层扫描中螺旋扫描成像的方法和装置

    公开(公告)号：US5386452A

    公开(公告)日：1995-01-31

    申请号：US64936

    申请日：1993-05-24

    申请人： Yusuke Toki

    发明人： Yusuke Toki

    IPC分类号： A61B6/03 ,  A61B6/04 ,  G06T11/00

    CPC分类号： A61B6/032 ,  A61B6/027 ,  A61B6/0457 ,  G06T11/005 ,  G06T2211/432

    摘要： A method and an apparatus for a helical scan imaging in an X-ray CT, in which the initial set up operation can be achieved easily and accurately. In this X-ray CT apparatus, a relative linear motion of the bed plate and the X-ray source is automatically controlled according to the desired imaging region specified by the operator such that the bed plate and the X-ray source is relatively linearly moved through a distance covered by a scanning region appropriate for collecting the data required in order to reconstruct the tomographic images for the desired imaging region. The scanning region includes the desired imaging region and the supplementary interpolation data regions, located at ends of the desired imaging region and utilized in carrying out interpolations for deriving data in the desired imaging region; an initial acceleration region for accounting an initial acceleration of the bed plate; and a final deceleration region for accounting a final deceleration of the bed plate.

    摘要翻译： 一种用于X射线CT中的螺旋扫描成像的方法和装置，其中可以容易且精确地实现初始设置操作。 在该X射线CT装置中，床板和X射线源的相对线性运动根据由操作者指定的期望的成像区域自动控制，使得床板和X射线源相对线性移动 通过适合于收集所需数据的扫描区域覆盖的距离，以便重建所需成像区域的断层图像。 扫描区域包括位于期望成像区域的端部处的所需成像区域和补充插值数据区域，并用于执行内插以导出期望的成像区域中的数据; 用于计算床板的初始加速度的初始加速区域; 以及用于计算床板的最终减速度的最终减速区域。