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公开(公告)号：US07197107B2
公开(公告)日：2007-03-27
申请号：US10834519
申请日：2004-04-29
IPC分类号： A61B6/04
CPC分类号： A61B6/469 , A61B6/032 , A61B6/14 , A61B6/4441 , A61B6/488 , A61B6/548 , A61B6/588 , A61B6/589 , G01N23/046 , G01N2223/419 , G01N2223/612
摘要： An X-ray computer tomography apparatus wherein a conical X-ray beam is radiated on a local area of an object while a rotary means with an X-ray generator and a two-dimensional X-ray image sensor faced to each other is rotated relative to the object which is disposed between the X-ray generator and the two-dimensional X-ray image sensor. The X-ray computer tomography apparatus comprises a preliminary imaging means for imaging the object under plural positional conditions wherein positional relations among the X-ray generator, the object and the two-dimensional X-ray image sensor are varied, a processing means for obtaining a three dimensional position of a target region of the object by calculating a two-dimensional positional data of a target region of the object which is determined on plural fluoroscopic images obtained by the preliminary imaging means, a position adjustment means for controlling the positional relation among the X-ray generator, the object and the two-dimensional X-ray image sensor in such a manner that the rotary center comes to the three dimensional position obtained by the processing means; and a main imaging means for obtaining a sectional image of the object while the rotary means and the object are relatively rotated after adjusting by the position adjustment means.
摘要翻译： 一种X射线计算机断层摄影装置，其中将具有X射线发生器和二维X射线图像传感器的旋转装置彼此面对的圆锥形X射线束照射在物体的局部区域上相对旋转 涉及设置在X射线发生器和二维X射线图像传感器之间的物体。 X射线计算机断层摄影装置包括：初步成像装置，用于在X射线发生器，物体和二维X射线图像传感器之间的位置关系改变的多个位置条件下成像物体;处理装置，用于获得 通过计算由预备成像装置获得的多个透视图像上确定的对象的目标区域的二维位置数据，来计算对象的目标区域的三维位置;位置调整装置， X射线发生器，物体和二维X射线图像传感器，使得旋转中心进入由处理装置获得的三维位置; 以及主要成像装置，用于在通过位置调整装置调节之后，在旋转装置和物体相对旋转的同时获得物体的截面图像。
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公开(公告)号：US08064569B2
公开(公告)日：2011-11-22
申请号：US12584150
申请日：2009-08-31
IPC分类号： A61B6/00
摘要： An X-ray CT imaging apparatus includes an X-ray generating section, an X-ray image capturing section, a supporting section, a holding section, a rotation driving section, and an X-ray controlling section, wherein the X-ray generating section generates an X-ray cone beam, the X-ray image capturing section detects the X-ray cone beam having passed through an object, the supporting section supports the X-ray generating section and the X-ray image capturing section with the object positioned therebetween, the holding section holds the object, the rotation driving section rotates the supporting section relatively to the object, and the X-ray controlling section alleviates an influence of a high X-ray absorption region, present inside the object, in the X-ray image capturing section by means of a control model formed based upon information on the high X-ray absorption region.
摘要翻译： X射线CT成像装置包括X射线产生部，X射线摄像部，支撑部，保持部，旋转驱动部，X射线控制部， X射线成像部生成X射线锥形束，X射线图像拍摄部检测已经穿过物体的X射线锥形束，支撑部将X射线产生部和X射线图像拍摄部与物体 所述保持部保持所述物体，所述旋转驱动部使所述支撑部相对于所述物体旋转，并且所述X射线控制部减轻所述物体内部的高X射线吸收区域对所述X的影响 通过基于关于高X射线吸收区域的信息形成的控制模型的射线图像捕获部分。
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公开(公告)号：US20100067650A1
公开(公告)日：2010-03-18
申请号：US12584150
申请日：2009-08-31
摘要： An X-ray CT imaging apparatus includes an X-ray generating section, an X-ray image capturing section, a supporting section, a holding section, a rotation driving section, and an X-ray controlling section, wherein the X-ray generating section generates an X-ray cone beam, the X-ray image capturing section detects the X-ray cone beam having passed through an object, the supporting section supports the X-ray generating section and the X-ray image capturing section with the object positioned therebetween, the holding section holds the object, the rotation driving section rotates the supporting section relatively to the object, and the X-ray controlling section alleviates an influence of a high X-ray absorption region, present inside the object, in the X-ray image capturing section by means of a control model formed based upon information on the high X-ray absorption region.
摘要翻译： X射线CT成像装置包括X射线产生部，X射线摄像部，支撑部，保持部，旋转驱动部，X射线控制部， X射线成像部生成X射线锥形束，X射线图像拍摄部检测已经穿过物体的X射线锥形束，支撑部将X射线产生部和X射线图像拍摄部与物体 所述保持部保持所述物体，所述旋转驱动部使所述支撑部相对于所述物体旋转，并且所述X射线控制部减轻所述物体内部的高X射线吸收区域对所述X的影响 通过基于关于高X射线吸收区域的信息形成的控制模型的射线图像捕获部分。
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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：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：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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8.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：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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