公开(公告)号：US06671348B2

公开(公告)日：2003-12-30

申请号：US09899285

申请日：2001-07-06

申请人： Keiji Ohkoda

发明人： Keiji Ohkoda

IPC分类号： G21K100

CPC分类号： G21K1/10

摘要： In an X-ray image detector including an X-ray grid unit for transmitting primary X-rays and removing scattered X-rays, a fluorescent substance for emitting fluorescence through excitation by X-rays, and photoelectric conversion elements for photoelectrically converting the fluorescence, these X-ray grid unit, fluorescent substance and photoelectric conversion elements are constituted together as a single unit. The plurality of photoelectric conversion elements are arranged two-dimensionally between each adjacent two of which there is a predetermined insensitive region. The X-ray grid is composed of a plurality of X-ray absorption members for removing the scattered X-rays, and the X-ray absorption members are disposed substantially only on the predetermined insensitive regions when viewed from a direction from which X-rays are incident. Further, the fluorescent substance is disposed substantially only in the regions between the X-ray absorption members that are adjacent to each other when viewed from a direction from which X-rays are incident.

公开(公告)号：US06625253B1

公开(公告)日：2003-09-23

申请号：US10223868

申请日：2002-08-20

申请人： Gary T. Barnes ,  David M. Gauntt

发明人： Gary T. Barnes ,  David M. Gauntt

IPC分类号： G21K100

CPC分类号： G21K1/025 ,  G21K1/10

摘要： Disclosed is an X-ray imaging system that comprises a high ratio, high primary transmission anti-scatter grid in combination with a dynamic X-ray tube output function to eliminate or reduce gridline artifacts. Conventional X-ray imaging systems utilizing conventional anti-scatter grids generally require that the grid be moved a distance of at least 20 grid pitches to eliminate gridline artifacts. Through the use of the anti-scatter grid and dynamic output function described, such artifacts are eliminated or substantially reduced when the grid travels a short distance. Any function that has zero frequency components at positive integer multiples of the reciprocal of the grid repeat time will completely suppress gridline artifacts. Any function that is equal to the convolution of an arbitrary function with a rect function whose width is a positive multiple of the grid repeat time will fit this criterion, and its use will completely suppress gridline artifacts.

摘要翻译： 公开了一种X射线成像系统，其包括高比率，高初级传输防散射格栅和动态X射线管输出功能，以消除或减少网格线伪像。 使用常规防散射网格的常规X射线成像系统通常要求网格移动至少20个网格间距的距离以消除网格线伪像。 通过使用所述的防散射栅格和动态输出功能，当栅格行进短距离时，消除这些伪影或显着减小。 任何在网格重复时间的倒数的正整数倍处具有零频率分量的函数将完全抑制网格线伪影。 任何等于任意函数与宽度为网格重复时间的正倍数的rect函数的卷积的函数将适合该标准，其使用将完全抑制网格线伪影。

公开(公告)号：US06529582B2

公开(公告)日：2003-03-04

申请号：US09914989

申请日：2001-09-06

申请人： Howard S. Feldmesser ,  Paul R. Falk ,  Thomas J. Beck ,  Harry K. Charles, Jr.

发明人： Howard S. Feldmesser ,  Paul R. Falk ,  Thomas J. Beck ,  Harry K. Charles, Jr.

IPC分类号： G21K100

CPC分类号： G21K1/025

摘要： An X-ray scatter reduction grid includes a first layer having a plurality of cells. The cells have a perimeter formed of an X-ray absorbing material. The shape of the perimeters can vary, but a polygonal shape is preferred. The grid can also include other layers, each with their own cells. The cells of the subsequent other layers are larger than and offset from the cells of the prior layer. The increased size of the cells allows a primary ray passing through the center of a first layer cell to also pass through the center of a subsequent layer cell. This allows for a maximum of primary ray passthrough and a maximum of scatter absorption.

摘要翻译： X射线散射减少栅格包括具有多个单元的第一层。 细胞具有由X射线吸收材料形成的周边。 周长的形状可以变化，但是多边形形状是优选的。 网格还可以包括其他层，每层都有自己的单元格。 随后的其他层的单元大于并偏离了先前层的单元。 单元的增加的尺寸允许通过第一层单元的中心的主要的光线也通过随后的层单元的中心。 这允许最大的一次射线通过和最大的散射吸收。

公开(公告)号：US06445772B1

公开(公告)日：2002-09-03

申请号：US09867995

申请日：2001-05-30

申请人： Jonathan W. Campbell

发明人： Jonathan W. Campbell

IPC分类号： G21K100

CPC分类号： G21K1/10 ,  G21K1/02

摘要： Fourier telescopes permit observations over a very broad band of energy. They generally include synthetic spatial filtering structures, known as multilayer grids or grid pairs consisting of alternate layers of absorbing and transparent materials depending on whether neutrons or photons are being imaged. For hard x-rays and gamma rays, high (absorbing) and low (transparent) atomic number elements, termed high-Z and low-Z materials may be used. Fabrication of these multilayer grid structures is not without its difficulties. Herein the alternate layers of the high-Z material and the low-Z material are inserted in a polyhedron, transparent to photons of interest, through an open face of the polyhedron. The inserted layers are then uniformly compressed to form a multilayer grid.

摘要翻译： 傅立叶望远镜允许在非常宽的能量范围内进行观察。 它们通常包括合成空间滤波结构，称为多层网格或网格对，由取决于中子或光子是否被成像的吸收和透明材料的交替层组成。 对于硬X射线和γ射线，可以使用称为高Z和低Z材料的高（吸收）和低（透明）原子数元素。 这些多层网格结构的制作并非没有困难。 这里，高Z材料和低Z材料的交替层通过多面体的开放面插入到对感兴趣的光子透明的多面体中。 然后将插入的层均匀地压缩以形成多层网格。

公开(公告)号：US06325538B1

公开(公告)日：2001-12-04

申请号：US09528039

申请日：2000-03-17

申请人： Christian M. Heesch

发明人： Christian M. Heesch

IPC分类号： G21K100

CPC分类号： G21F3/00 ,  A61B6/107 ,  A61B6/4423 ,  A61B6/4452 ,  A61B6/4464

摘要： A shield apparatus is disclosed that encloses the human torso (or part of a human torso) during X-ray procedures. The shield protects medical personnel from scatter radiation, is adjustable to fit different size torsos, and will move with the X-ray equipment as the position of the equipment is adjusted to examine different areas of the body.

摘要翻译： 公开了在X射线程序期间包围人体躯干（或人体躯干的一部分）的屏蔽装置。 屏蔽保护医务人员免受散射辐射，可调节以适应不同大小的躯干，并随着设备的位置调整以移动与X射线设备的位置，以检查身体的不同区域。

公开(公告)号：US06310938B1

公开(公告)日：2001-10-30

申请号：US09384937

申请日：1999-08-27

申请人： Thomas L. Toth ,  George E. Seidenschnur ,  Neil B. Bromberg

发明人： Thomas L. Toth ,  George E. Seidenschnur ,  Neil B. Bromberg

IPC分类号： G21K100

CPC分类号： A61B6/583 ,  A61B6/4021 ,  G01N23/046 ,  G01N2223/419 ,  G01N2223/612

摘要： The present invention is, in one embodiment, a method for determining tracking control parameters for positioning an x-ray beam of a computed tomography imaging system having a movable collimator positionable in steps and a detector array including a plurality of rows of detector elements. The method includes steps of obtaining detector samples at a series of collimator step positions while determining a position of a focal spot of the x-ray beam; determining a beam position for each detector element at each collimator step utilizing the determined focal spot positions, a nominal focal spot length, and geometric parameters of the x-ray beam, collimator, and detector array; and determining a calibration parameter utilizing information so obtained. For example, in determining a target beam position at which to maintain the x-ray beam, a detector element differential error is determined according to ratios of successive collimator step positions; and a target beam position is selected for an isocenter element in accordance with the determined element differential errors.

摘要翻译： 本发明在一个实施例中是一种用于确定跟踪控制参数的方法，所述跟踪控制参数用于定位具有可定位的可移动准直器的计算机断层摄影成像系统的X射线束和包括多行检测器元件的检测器阵列。 该方法包括以下步骤：在确定X射线束的焦斑的位置的同时在一系列准直器步骤位置获得检测器样本; 使用所确定的焦点位置，标称焦点长度以及x射线束，准直仪和检测器阵列的几何参数来确定每个准直器步骤处的每个检测器元件的光束位置; 以及使用如此获得的信息来确定校准参数。 例如，在确定维持X射线束的目标光束位置时，根据连续的准直仪台阶位置的比例来确定检测器元件差分误差; 并且根据确定的元件微分误差为等角点元件选择目标光束位置。

公开(公告)号：US06185279B2

公开(公告)日：2001-02-06

申请号：US09194501

申请日：1998-11-19

申请人： Edmond Chambron

发明人： Edmond Chambron

IPC分类号： G21K100

CPC分类号： G21K1/04 ,  H01J35/16 ,  H01J2235/166 ,  H01J2235/18

摘要： A casing for an electromagnetic radiation source includes a window made of a material that is transparent to the radiation emitted by the source and which includes at least one chamber in which a material that is opaque to electromagnetic radiation can move. The chamber is designed such that the material that is opaque to radiation can be introduced from the exterior of the chamber. Inside the chamber, the material that is opaque to radiation surrounds a region for passage of a radiation beam such that the area of the beam passage region varies as a function of the volume of opaque material in the chamber, by virtue of which parasitic extrafocal radiation is eliminated from the beam.

摘要翻译： 用于电磁辐射源的壳体包括由对源发出的辐射透明的材料制成的窗口，该窗口包括至少一个室，其中电磁辐射不透明的材料可移动。 室被设计成使得对辐射不透明的材料可以从室的外部引入。 在室内，对辐射不透明的材料围绕用于辐射束通过的区域，使得束通道区域的面积随室内不透明材料体积的变化而变化，借助于哪个寄生附加辐射 从光束中消除。

公开(公告)号：US06807252B1

公开(公告)日：2004-10-19

申请号：US10280301

申请日：2002-10-24

申请人： John M. Dobbs

发明人： John M. Dobbs

IPC分类号： G21K100

CPC分类号： G21K1/025

摘要： A method for manufacturing an anti-scatter grid having a desired height. The method includes positioning a bottom surface of a mask of dielectric material, with a depth at least equal to the desired height of the anti-scatter grid, on a sheet of metal, cutting first and second series of intrinsically focused slots through a top surface of the mask to the sheet of metal, plating the sheet of metal at the bottom of each of the slots of the mask with a radiopaque material to form partition walls of the anti-scatter grid, and continuing to plate the radiopaque material into the slots of the mask until the desired height of the anti-scatter grid is achieved.

摘要翻译： 一种制造具有期望高度的防散射栅格的方法。 该方法包括将电介质材料的掩模的底表面至少等于抗散射栅格的期望高度的深度定位在金属片上，通过顶表面切割第一和第二系列本征聚焦槽 的掩模涂覆到金属板上，用不透射线材料在掩模的每个槽的底部电镀金属片，以形成防散射栅格的分隔壁，并且继续将不透射线材料平板到槽中 从而达到防散射格栅的期望高度。

公开(公告)号：US06795528B2

公开(公告)日：2004-09-21

申请号：US10035154

申请日：2002-01-04

申请人： Makoto Nokita

发明人： Makoto Nokita

IPC分类号： G21K100

CPC分类号： A61B6/463 ,  A61B6/06 ,  A61B6/4233 ,  A61B6/4291

摘要： A radiographic apparatus is disclosed which controls a movement of a reciprocatingly moving grid so that the grid is not or less likely returned in the middle of exposure of an object to X rays. The probability that the object is still exposed to the X rays when the grid is moved in the vicinity of a turning point is thus substantially lowered. Therefore the probability that a resulting radiograph has no or less moire pattern due to the grid is substantially heightened.

摘要翻译： 公开了一种放射线照相设备，其控制往复运动的格栅的运动，使得格栅不会或不太可能在物体暴露于X射线的过程中返回。 因此，当栅格在转折点附近移动时，物体仍然暴露于X射线的可能性大大降低。 因此，由于网格而产生的射线照片没有或更少的莫尔图案的概率显着提高。

公开(公告)号：US06678352B1

公开(公告)日：2004-01-13

申请号：US09744467

申请日：2001-04-05

申请人： Muradin Abubekirovich Kumakhov

发明人： Muradin Abubekirovich Kumakhov

IPC分类号： G21K100

CPC分类号： G03B42/02 ,  G01N23/04 ,  G21K1/025

摘要： An anti-scatter X-ray raster provides suppression of secondary scattered Compton radiation thus improving image contrast. The anti-scatter X-ray raster comprises a plurality of tubular channels made of an X-ray absorbing material. The tubular channels are spliced together to form a cellular structure. The largest cross size (d) of a singe channel its length (H) meet a relationship 2d/H>&thgr;c, where &thgr;c is a critical angle of total external reflection of X-rays from the material forming the walls of the tubular channels. The cross-section of the tubular channels need not be circular but may be, for example triangular or hexagonal. In a non-focused raster embodiment all of the longitudinal axis of the channels are parallel. In focused embodiments, the longitudinal axis of the channels are radially angled such that if extended they would meet at the X-ray source point.

摘要翻译： 抗散射X射线光栅提供抑制二次散射康普顿辐射，从而改善图像对比度。 防散射X射线光栅包括由X射线吸收材料制成的多个管状通道。 管状通道拼接在一起以形成多孔结构。 单个通道的最大交叉尺寸（d）的长度（H）满足关系2d / H> thetac，其中tac是来自形成管状通道壁的材料的X射线的总外部反射的临界角。 管状通道的横截面不必是圆形的，而是可以是例如三角形或六边形。 在非聚焦光栅实施例中，通道的所有纵向轴线是平行的。 在聚焦实施例中，通道的纵向轴线是径向成角度的，使得如果延伸，则它们将在X射线源点处相遇。