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    • 83. 发明授权
    • CT scanning apparatus
    • CT扫描仪
    • US06243439B1
    • 2001-06-05
    • US09265908
    • 1999-03-10
    • Yoshinori AraiMasakazu Suzuki
    • Yoshinori AraiMasakazu Suzuki
    • A61B603
    • A61B6/08A61B6/032A61B6/12A61B6/14A61B6/5264
    • A CT scanning apparatus in accordance with the present invention comprises an image pickup system having an X-ray source being rotated around an object and a two-dimensional X-ray image pickup portion disposed opposite to the X-ray source with the object therebetween and being rotated, and is configured to rotate the image pickup system so as to radiograph three-dimensional areas inside the object, wherein a substance capable of being detected as an X-ray image is used as a position marker, and the position marker is disposed so as to be positioned in the image pickup view of the image pickup system during the rotation of the image pickup system and radiographed together with the object. In an ideal case, the image of the position marker in the two-dimensional X-ray image obtained as described above moves in a sine curve. Therefore, a correction amount for each X-ray image is calculated from the difference between the actual position in the X-ray image and the ideal position changing in the sine curve. By using the correction amount, the two-dimensional X-ray image is corrected, and a CT image is built. As a result, the effects of “moving artifact” and the like can be eliminated, and a clear image can be obtained.
    • 根据本发明的CT扫描装置包括具有围绕物体旋转的X射线源的图像拾取系统和与X射线源相对设置的二维X射线摄像部分,其间具有物体, 被配置为旋转图像拾取系统,以便对物体内部的三维区域进行射线照射,其中将能够被检测为X射线图像的物质用作位置标记,并且设置位置标记 以便在图像拾取系统的旋转期间被定位在图像拾取系统的图像拾取视图中并与对象一起被射出。 在理想情况下,如上所述获得的二维X射线图像中的位置标记的图像以正弦曲线移动。 因此,根据X射线图像中的实际位置与在正弦曲线中变化的理想位置之间的差计算每个X射线图像的校正量。 通过使用校正量,校正二维X射线图像,并构建CT图像。 结果,可以消除“移动假象”等的影响,并且可以获得清晰的图像。
    • 85. 发明授权
    • X-ray image pickup apparatus for intraoral radiography
    • 用于口腔内摄影的X射线摄像装置
    • US06042267A
    • 2000-03-28
    • US56935
    • 1998-04-08
    • Tetsuhiko MurakiHitoshi AsaiKazuhisa MiyaguchiAkifumi TachibanaMasakazu SuzukiSusumu Kirimura
    • Tetsuhiko MurakiHitoshi AsaiKazuhisa MiyaguchiAkifumi TachibanaMasakazu SuzukiSusumu Kirimura
    • A61B6/14G01T1/20G01T1/29G03B42/04H04N5/32
    • H04N5/32G01T1/2018G03B42/042A61B6/145
    • A phosphor, an optical fiber plate containing lead particles, a CCD, and an X-ray shielding member consisting of copper tungsten are sequentially stacked on a substrate from an X-ray incident surface side and sealed in a container made of a light-shielding synthetic resin. The substrate has projecting portions projecting toward the direction of X-ray incident along three sides of the X-ray incident surface. Each of these projecting portions has an overhang portion projecting toward the optical fiber plate. The overhang portions are close to or in contact with corresponding side surfaces of the optical fiber plate so that the optical fiber plate is fixed at a predetermined position. The container has, in the inner surface, convex portions corresponding to the projecting portions, so the substrate is fixed in the container. The output signal from the CCD is sent to an external display unit via a cable extracted from the convex portion of the container through an FPC connector and an FPC provided on a surface opposite to the incident surface.
    • 含有铅粒子的荧光体,含有铜粒子的CCD和X射线屏蔽部件从X射线入射面侧依次层叠在基板上,并密封在由遮光体 合成树脂。 基板具有沿着X射线入射面的三面入射的X射线方向突出的突出部。 这些突出部分中的每一个具有向光纤板突出的突出部分。 突出部分靠近或与光纤板的相应侧表面接触,使得光纤板固定在预定位置。 该容器在内表面具有与突出部对应的凸部,因此将基板固定在容器中。 来自CCD的输出信号经由通过FPC连接器和设置在与入射面相反的表面上的FPC从容器的凸部抽出的电缆发送到外部显示单元。