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公开(公告)号：US06289074B1
公开(公告)日：2001-09-11
申请号：US09388282
申请日：1999-09-01
IPC分类号： A61B603
摘要： An X-ray computed tomography (CT) method of producing sectional images and panoramic images while reducing the exposure dose and time. The method includes producing an X-ray projection image on a two-demensional X-ray image sensor by turning a rotary arm within a scope of angle according to the projection conditions, while locally radiating conical X-ray beams, with a small width in the rotating direction of the beams, with the rotating center of the rotary arm fixed at the center position of the region to be X-rayed and the X-ray projection images are processed using specific equation as previously prepared by a computer to extract image information, and thereby to produce a sectional image of the local region of the object to be examined.
摘要翻译： 一种在减少曝光剂量和时间的同时产生截面图像和全景图像的X射线计算机断层摄影（CT）方法。 该方法包括：在二维X射线图像传感器的基础上，通过在旋转臂的角度范围内，根据投影条件旋转X射线投射图像，同时局部地辐射锥形X射线束，其宽度小 梁的旋转方向，其中旋转臂的旋转中心固定在要被X射线的区域的中心位置处，并且使用由计算机预先准备的特定方程来处理X射线投影图像以提取图像信息 ，从而产生被检查物体的局部区域的截面图像。
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公开(公告)号：US6018563A
公开(公告)日：2000-01-25
申请号：US986945
申请日：1997-12-08
CPC分类号： A61B6/14 , G01N23/046 , H05G1/44 , H05G1/64 , G01N2223/419
摘要： An X-ray imaging apparatus including an X-ray tube which emits X-rays, an image sensor which detects X-rays which pass through an object, a support arm which supports the X-ray tube and the image sensor so that they are opposed to each other across the object, a driving motor which moves the support arm in a predetermined direction, a gain adjustment circuit which adjusts the imaging sensitivity of the image sensor and a controlling circuit for controlling the gain of the adjusting circuit. The controlling circuit controls the gain adjusting circuit on the basis of the detected image density of the image sensor. When the adjustment by means of the gain adjusting circuit is insufficient, the controlling circuit controls X-ray tube current, X-ray tube voltage and driving speed adjusters.
摘要翻译： 一种X射线成像装置，包括发射X射线的X射线管，检测穿过物体的X射线的图像传感器，支撑X射线管的支撑臂和图像传感器，使得它们是 相对于物体彼此相对的驱动电机，使支撑臂沿预定方向移动的驱动电动机，调整图像传感器的成像灵敏度的增益调整电路和用于控制调整电路的增益的控制电路。 控制电路根据检测到的图像传感器的图像浓度控制增益调整电路。 当通过增益调节电路的调整不足时，控制电路控制X射线管电流，X射线管电压和驱动速度调节器。
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公开(公告)号：US6118842A
公开(公告)日：2000-09-12
申请号：US987218
申请日：1997-12-09
CPC分类号： A61B6/032 , A61B6/14 , A61B6/06 , Y10S378/901
摘要： An object of the invention is to provide a dual-purpose X-ray imaging apparatus capable of partial CT imaging in addition to panoramic tomographic imaging. Another object of the invention is to provide a dedicated partial X-ray CT imaging apparatus. An X-ray imaging apparatus comprises an X-ray source 28 which irradiates an object with X-rays; an image sensor 38 which detects X-rays having passed through the object; a support arm 24 which supports the X-ray source 28 and the image sensor 38; and a plurality of motors for moving the support arm 24. These motors move the X-ray source 28 and image sensor 38 along a CT image formation locus in the CT mode, and the X-ray source 28 and the image sensor 38 along a panoramic image formation locus in the case of the panorama mode.
摘要翻译： 本发明的一个目的是提供一种能够进行全景断层摄影成像的部分CT成像的双用途X射线成像装置。 本发明的另一个目的是提供专用的部分X射线CT成像装置。 X射线成像装置包括用X射线照射物体的X射线源28; 检测穿过物体的X射线的图像传感器38; 支撑X射线源28和图像传感器38的支撑臂24; 以及用于移动支撑臂24的多个电动机。这些电动机沿CT模式沿着CT成像轨迹移动X射线源28和图像传感器38，并且沿着X射线源28和图像传感器38沿着 全景图像形成轨迹在全景模式的情况下。
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公开(公告)号：US08817944B2
公开(公告)日：2014-08-26
申请号：US13207196
申请日：2011-08-10
CPC分类号： A61B6/14 , A61B6/03 , A61B6/035 , A61B6/06 , A61B6/4452 , A61B6/4476 , A61B6/469 , A61B6/501 , A61B6/542 , A61B2034/2059
摘要： In an X-ray imaging apparatus that performs X-ray CT imaging, an X-ray generator (13) that generates an X-ray cone beam (BX1) and an X-ray detector (21) that detects the X-ray cone beam (BX1) radiated to an object (specifically, image object (OB)) are revolved for 180 degrees to be opposed to each other with the object being located therebetween. Further, the X-ray generator (13) is moved such that a revolution reference point (CP) that is set on an optical path (CB) of the X-ray cone beam (BX1) goes round of a predetermined oval shape while the X-ray detector (13) and the X-ray generator (21) are revolved for 180 degrees. Setting is made such that a CT image area (CA) to be imaged by the irradiation of the X-ray cone beam (BX1) has an approximately triangular shape through the above-mentioned operation.
摘要翻译： 在进行X射线CT成像的X射线成像装置中，生成X射线发生器（13），其生成X射线锥形束（BX1）和X射线检测器（21），其检测X射线锥 辐射到物体（具体地，图像物体（OB））的光束（BX1）以对角物位于其间的方式相互旋转180度。 此外，X射线发生器（13）移动，使得设置在X射线锥形束（BX1）的光路（CB）上的旋转基准点（CP）绕预定的椭圆形圆转，同时 X射线检测器（13）和X射线发生器（21）旋转180度。 使得通过X射线锥形束（BX1）的照射成像的CT图像区域（CA）通过上述操作具有近似三角形的设置。
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公开(公告)号：US20120039435A1
公开(公告)日：2012-02-16
申请号：US13207196
申请日：2011-08-10
IPC分类号： A61B6/03
CPC分类号： A61B6/14 , A61B6/03 , A61B6/035 , A61B6/06 , A61B6/4452 , A61B6/4476 , A61B6/469 , A61B6/501 , A61B6/542 , A61B2034/2059
摘要： In an X-ray imaging apparatus that performs X-ray CT imaging, an X-ray generator (13) that generates an X-ray cone beam (BX1) and an X-ray detector (21) that detects the X-ray cone beam (BX1) radiated to an object (specifically, image object (OB)) are revolved for 180 degrees to be opposed to each other with the object being located therebetween. Further, the X-ray generator (13) is moved such that a revolution reference point (CP) that is set on an optical path (CB) of the X-ray cone beam (BX1) goes round of a predetermined oval shape while the X-ray detector (13) and the X-ray generator (21) are revolved for 180 degrees. Setting is made such that a CT image area (CA) to be imaged by the irradiation of the X-ray cone beam (BX1) has an approximately triangular shape through the above-mentioned operation.
摘要翻译： 在进行X射线CT成像的X射线成像装置中，生成X射线发生器（13），其生成X射线锥形束（BX1）和X射线检测器（21），其检测X射线锥 辐射到物体（具体地，图像物体（OB））的光束（BX1）以对角物位于其间的方式相互旋转180度。 此外，X射线发生器（13）移动，使得设置在X射线锥形束（BX1）的光路（CB）上的旋转基准点（CP）绕预定的椭圆形圆转，同时 X射线检测器（13）和X射线发生器（21）旋转180度。 使得通过X射线锥形束（BX1）的照射成像的CT图像区域（CA）通过上述操作具有近似三角形的设置。
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公开(公告)号：US07570734B2
公开(公告)日：2009-08-04
申请号：US10894218
申请日：2004-07-19
申请人： Yoshinori Arai , Masakazu Suzuki
发明人： Yoshinori Arai , Masakazu Suzuki
IPC分类号： A61B6/03
CPC分类号： A61B6/4441 , A61B6/027 , A61B6/032 , A61B6/4085 , A61B6/463 , A61B6/583
摘要： In an X-ray computerized tomography scanner, a correction phantom embedding an X-ray absorbing object is put on or around a non-vertical rotary axis between an X-ray source and a two-dimensional X-ray detector, and two dimensional imaging data of the phantom is acquired. Then a locus of the X-ray absorbing material is determined in the two-dimensional imaging data, and based on the locus an ideal locus is obtained in the direction of the rotary axis. Next, a difference between the calculated position of the ideal locus and a measured position is determined in the direction of the rotary axis. The difference is used to correct deviation in the direction of the rotary axis.
摘要翻译： 在X射线计算机断层扫描仪中，将X射线吸收物体的校正幻影放置在X射线源和二维X射线检测器之间的非垂直旋转轴上或周围，并且二维成像 获得幻影的数据。 然后在二维成像数据中确定X射线吸收材料的轨迹，并且基于轨迹，在旋转轴的方向上获得理想轨迹。 接下来，在旋转轴的方向上确定理想轨迹的计算位置与测量位置之间的差。 该差异用于校正旋转轴方向上的偏差。
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7.发明授权Display method and apparatus of x-ray projection image for medical use, x-ray CT apparatus for medical use and recording medium for recording program to achieve the display method 失效用于医疗用的x射线投射图像的显示方法和装置，用于医疗用的x射线CT装置和用于记录程序的记录介质以实现显示方法公开(公告)号：US07039156B2
公开(公告)日：2006-05-02
申请号：US10398321
申请日：2001-10-04
申请人： Yoshinori Arai , Masakazu Suzuki , Kouji Yasuda
发明人： Yoshinori Arai , Masakazu Suzuki , Kouji Yasuda
IPC分类号： A61B6/14
CPC分类号： A61B6/463 , A61B6/0478 , A61B6/14 , A61B6/469
摘要： A display method and apparatus of an X-ray projection image for medical use wherein a projection interested area to construct the X-ray projection image of an object is set on an image layer with an extending predetermined thickness perpendicular to an X-ray radiation plane defined by rotational radiation of an X-ray beam, the projection interested area is comprised of the three dimensional X-ray absorption coefficient data, and the X-ray projection image is produced by projecting the three dimensional X-ray absorption coefficient data existing in the projection interested area with respect to a projection plane intersecting the X-ray radiation plane.
摘要翻译： 一种用于医疗用途的X射线投影图像的显示方法和装置，其中将建立物体的X射线投影图像的投影感兴趣区域设置在垂直于X射线辐射平面的延伸的预定厚度的图像层上 由X射线束的旋转辐射限定，投影感兴趣区域由三维X射线吸收系数数据组成，并且X射线投影图像是通过将存在的三维X射线吸收系数数据 投影感兴趣区域相对于与X射线辐射平面相交的投影平面。
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公开(公告)号：US06243439B1
公开(公告)日：2001-06-05
申请号：US09265908
申请日：1999-03-10
申请人： Yoshinori Arai , Masakazu Suzuki
发明人： Yoshinori Arai , Masakazu Suzuki
IPC分类号： A61B603
CPC分类号： A61B6/08 , A61B6/032 , A61B6/12 , A61B6/14 , A61B6/5264
摘要： 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.
摘要翻译： 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。
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公开(公告)号：US20130170610A1
公开(公告)日：2013-07-04
申请号：US13691158
申请日：2012-11-30
IPC分类号： A61B6/14
摘要： The present invention has an object of providing an X-ray CT imaging device which can direct X-ray to an area of interest appropriately even when, for example, the height of the area of interest with respect to the X-ray detector, which is revolving, varies with respect to the revolution direction, and thus can reduce the amount of unnecessary exposure to the X-ray and can perform X-ray imaging of the area of interest with certainty. In an X-ray CT imaging device for performing X-ray CT imaging of a CT imaging area of a subject, during the X-ray CT imaging when a revolving arm is revolving, the expansion in a length direction of an X-ray cone beam, which is to be restricted by length direction blocking plates, is adapted to the shape of the CT imaging area in accordance with the revolution position of the revolving arm.
摘要翻译： 本发明的目的是提供一种X射线CT成像装置，其即使在例如相对于X射线检测器的感兴趣区域的高度方面也可以适当地将X射线引导到感兴趣区域， 旋转，相对于旋转方向而变化，因此可以减少不必要地暴露于X射线的量，并且可以确定地进行感兴趣区域的X射线成像。 在用于进行被检体的CT成像区域的X射线CT成像的X射线CT成像装置中，在旋转臂旋转的X射线CT成像期间，X射线锥体的长度方向的膨胀 由长度方向阻挡板限制的梁适应于根据旋转臂的旋转位置的CT成像区域的形状。
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公开(公告)号：US06493415B1
公开(公告)日：2002-12-10
申请号：US09937245
申请日：2001-12-28
申请人： Yoshinori Arai , Masakazu Suzuki
发明人： Yoshinori Arai , Masakazu Suzuki
IPC分类号： H05G160
CPC分类号： A61B6/14
摘要： An X-ray computed tomography method and apparatus for obtaining a panoramic X-ray image seen from a direction of a projection line &ggr; (&ggr;′) of a curved sectional area SA by expanding calculation results of three-dimensional distribution information of X-ray absorption coefficient on the projection line &ggr; (&ggr;′) intersecting at a specified angle &bgr; (&bgr;′) for any regions &agr; of the panoramic sectional image layer SB on a two-dimensional plane based on the three dimensional distribution information of X-ray absorption coefficient of the curved sectional area SA obtained by a X-ray CT.
摘要翻译： 一种X射线计算机断层摄影方法和装置，用于通过扩展X射线的三维分布信息的计算结果来获得从弯曲截面积SA的投影线gamma（gamma'）的方向看到的全景X射线图像 基于X射线吸收的三维分布信息，在二维平面上的全景截面图像层SB的任意区域α以与指定角度β（β'）相交的投影线γ（γ'）的吸收系数 通过X射线CT获得的弯曲截面积SA的系数。
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