公开(公告)号：US06181772B2

公开(公告)日：2001-01-30

申请号：US09283783

申请日：1999-04-01

申请人： Leo J. Reina ,  James T. Sorgani

发明人： Leo J. Reina ,  James T. Sorgani

IPC分类号： G21K110

CPC分类号： G21K1/025

摘要： A grid enclosure for an X-ray cassette has a rugged construction, and is easy to us efficient in operation, with open corners therein to achieve the desired protection of an X-ray cassette.

摘要翻译： 用于X射线盒的格栅外壳具有坚固的结构，并且容易使我们有效的操作，其中的开口角落实现了对X射线盒的期望的保护。

公开(公告)号：US06690767B2

公开(公告)日：2004-02-10

申请号：US10079303

申请日：2002-02-19

申请人： James E. Davis

发明人： James E. Davis

IPC分类号： G21K110

CPC分类号： G21K1/025 ,  G21K1/10

摘要： A shielding grid constructed of a radiation absorbing material for use with an array of discreet, non contiguous radiation sensors to protect such sensors from scattered radiation. The sensors each have a radiation sensitive area with a width and a length. In designing the grid a prototile having a prototile width and a prototile length is developed. The prototile width is equal to the radiation sensitive area width divided by an integer and the prototile length is also equal to the radiation sensitive area length divided by an integer. The prototile contains a pinwheel motif of radiation absorbing material contained solely within the prototile that forms a pattern when a plurality of prototiles sufficient to cover the array of discreet sensor are arrayed contiguously. The grid is constructed with the radiation absorbing material in this pattern.

摘要翻译： 由辐射吸收材料构成的屏蔽网格，用于与排列不连续的辐射传感器阵列一起使用，以保护这种传感器免受散射辐射的影响。 传感器各具有宽度和长度的辐射敏感区域。 在设计网格时，开发了具有原始宽度和原始长度的原型。 原始宽度等于辐射敏感区域宽度除以整数，原始长度也等于辐射敏感区域长度除以整数。 原型包含仅在内部原型中包含的辐射吸收材料的风车图案，当形成足够覆盖离散传感器阵列的多个原生质体连续排列时，其形成图案。 在该图案中用该辐射吸收材料构成栅格。

公开(公告)号：US06548570B1

公开(公告)日：2003-04-15

申请号：US09713219

申请日：2000-11-16

申请人： Wolfgang Lange

发明人： Wolfgang Lange

IPC分类号： G21K110

CPC分类号： G21F1/106 ,  B29B7/7495 ,  B29B7/90 ,  C08K3/08 ,  C08L23/08 ,  C08L23/16 ,  C08L23/22 ,  C08L101/00 ,  C08L21/00 ,  C08L2666/04

摘要： A radiation shielding material is manufactured from an elastomer that is blended with a radiation-absorbing filler material. The filler material comprises a powder of a metal with a high atomic member, or compounds thereof. The filler material is represented by more than 80 percent weight and has a grain size distribution in the range of 20 &mgr;m to 120 &mgr;m. The filler material is mixed with a loading material in powdered form. That mixture is kneaded with the elastomer within a mixer while the temperature is maintained below 180° C. The kneaded mixture is cooled and then cut into strips. The strips are passed through a strainer having a mesh width of between 5 &mgr;m and 1000 &mgr;m. The strained strips are then formed into a foil.

摘要翻译： 辐射屏蔽材料由与吸收辐射的填充材料混合的弹性体制成。 填充材料包括具有高原子成分的金属粉末或其化合物。 填充材料以重量百分之八十以上表示，其粒径分布范围为20〜120μm。 填料与粉末形式的装载材料混合。 将该混合物在混合器内与弹性体捏合，同时将温度保持在180℃以下。将捏合的混合物冷却，然后切成条。 条带通过筛网宽度在5um到1000μm之间的过滤器。 然后将应变条形成箔。

公开(公告)号：US06470067B1

公开(公告)日：2002-10-22

申请号：US09795019

申请日：2001-02-28

申请人： Geoffrey Harding

发明人： Geoffrey Harding

IPC分类号： G21K110

CPC分类号： A61B6/4291 ,  A61B6/032 ,  A61B6/483

摘要： A computed tomography apparatus includes a scanning unit which is rotatable relative to an examination zone, about an axis of rotation extending through the examination zone, a radiation source for generating a radiation beam, a diaphragm arrangement which is arranged between the radiation source and the examination zone in order to form a fan beam traversing the examination zone from the radiation beam, and a two-dimensional detector arrangement including a plurality of detector elements and a part of the measuring surface of which detects primary radiation from the fan beam whereas another part of its measuring surface detects scattered radiation produced in the examination zone. Perfect acquisition of the momentum transfer spectrum is achieved in that a collimator arrangement with a plurality of lamellas is arranged between the examination zone and the detector arrangement. The lamellas preferably are situated in planes that intersect each other at the focus of the radiation source and subdivide the fan beam into a number of segments so that the detector elements present in a column extending parallel to the axis of rotation are struck by primary radiation or scattered radiation from the same segment.

摘要翻译： 计算机断层摄影装置包括扫描单元，其可相对于检查区域旋转，围绕穿过检查区域的旋转轴线，用于产生辐射束的辐射源，布置在辐射源和检查之间的隔膜装置 区域，以形成从辐射束穿过检查区的扇形光束;以及包括多个检测器元件的二维检测器装置，并且其测量表面的一部分检测来自风扇光束的主要辐射，而另一部分 其测量面检测在检查区产生的散射辐射。 通过在检查区域和检测器装置之间布置具有多个薄片的准直器装置来实现动量传递光谱的完美采集。 薄片优选地位于在辐射源的焦点处彼此相交的平面中，并将扇形光束细分成多个分段，使得存在于平行于旋转轴线延伸的列中的检测器元件被初级辐射或 来自同一片段的散射辐射。

公开(公告)号：US06181773B2

公开(公告)日：2001-01-30

申请号：US09264648

申请日：1999-03-08

申请人： Denny L. Y. Lee ,  Kelly P. Golden

发明人： Denny L. Y. Lee ,  Kelly P. Golden

IPC分类号： G21K110

CPC分类号： G21K1/025

摘要： A radiation anti-scatter device comprising a grid and a grid driver connected to the grid for unidirectionaly moving the grid with a variable grid velocity along a path between a starting and an end position, and a method of providing such grid motion. The variable grid velocity may have a velocity profile V1=k1t for a first period and then V2=k2t−m for a second period, where V1 and V2 are velocity, k1 and k2 are constants, t is time, and m is an exponent having a value greater than 0. The anti-scatter device may be a component of a direct radiographic diagnostic imaging system which includes an image-producing element having an array of radiation detectors aligned in rows, and where the anti-scatter device is a grid having vanes oriented at an angle to the detector rows. Radiation emission may be synchronized with the grid motion to optimize a radiograph for a particular grid, radiation source, or examination procedure. The apparatus implements a method for reducing Moir{acute over (e)} patterns in radiographic detectors having an array of sensors by unidirectionaly moving the grid in a single stroke during the radiation exposure with an asymptotically decreasing speed profile such that grid motion is maintained for a plurality of different radiation exposure times.

摘要翻译： 一种辐射防散射装置，包括栅格和连接到栅格的栅极驱动器，用于沿着开始和结束位置之间的路径以可变栅格速度单向移动栅格，以及提供这种栅格运动的方法。 可变网格速度可以具有第一周期的速度分布V1 = k1t，然后在第二周期中可以具有V2 = k2t-m，其中V1和V2是速度，k1和k2是常数，t是时间，m是指数 具有大于0的值。防散射装置可以是直接放射照相诊断成像系统的部件，其包括具有排列成阵列的辐射检测器的图像产生元件，并且其中防散射装置是格栅 具有与检测器行成一定角度的叶片。 辐射发射可以与电网运动同步，以优化特定电网，辐射源或检查程序的射线照片。 该装置实现了一种用于通过在辐射暴露期间以一个行程单向移动网格以渐近减小的速度分布来降低具有传感器阵列的放射线照相检测器中的莫尔图案的方法，使得网格运动保持多个不同的辐射曝光时间 。

公开(公告)号：US06797744B2

公开(公告)日：2004-09-28

申请号：US10048064

申请日：2002-01-28

申请人： Osamu Hashimoto ,  Tetsu Soh ,  Masato Tadokoro

发明人： Osamu Hashimoto ,  Tetsu Soh ,  Masato Tadokoro

IPC分类号： G21K110

CPC分类号： H05K9/0088 ,  H01Q17/00 ,  Y10T428/24999

摘要： There is disclosed a composition which is layered in a reflective board to constitute a radio wave absorber. In this composition, an electroconductive titanium oxide is compounded with a substrate. With regard to the substrate, there may be used thermoplastic resin, thermosetting resin, rubber or elastomer.

摘要翻译： 公开了在反射板上层叠以构成无线电波吸收体的组合物。 在该组合物中，将导电氧化钛与基材混合。 关于基材，可以使用热塑性树脂，热固性树脂，橡胶或弹性体。

公开(公告)号：US06594342B2

公开(公告)日：2003-07-15

申请号：US10189635

申请日：2002-07-08

申请人： Donald Earl Castleberry

发明人： Donald Earl Castleberry

IPC分类号： G21K110

CPC分类号： G21K1/025

摘要： An anti-scatter grid for radiography includes a plurality of generally radiation absorbing elements and a plurality of generally non-radiation absorbing elements in which the generally non-radiation absorbing elements include a plurality of voids. Desirably, the non-radiation absorbing elements include an epoxy or polymeric material and a plurality of hollow microspheres. Disclosed is also an apparatus for forming an anti-scatter grid in which the apparatus includes a pivoting arm and surface for use in aligning a plurality of spaced-apart generally radiation absorbing elements relative to a radiation source.

公开(公告)号：US06470072B1

公开(公告)日：2002-10-22

申请号：US09645756

申请日：2000-08-24

申请人： Mark A. Johnson

发明人： Mark A. Johnson

IPC分类号： G21K110

CPC分类号： G21K1/025

摘要： An injection molded anti-scatter grid is fabricated from an engineered thermoplastic to form a focused x-ray absorbent framework defining a plurality of inter-spaces. The engineered thermoplastic has higher yield strength than conventional anti-scatter grid fabrication materials, which produces a structurally rigid grid that renders conventional fiber-like inter-space material unnecessary, and further allows the grid to be flexed in one or more directions to change an effective focal length of the grid. The engineered thermoplastic is loaded with high density particles in order to be x-ray absorbent, while still maintaining desired structural properties.

摘要翻译： 注射成型的防散射网格由工程热塑性塑料制成，以形成限定多个间隔的聚焦x射线吸收框架。 工程热塑性塑料具有比传统的防散射网格制造材料更高的屈服强度，其产生结构上刚性的网格，使得不需要常规的纤维状间隔材料，并且还允许网格在一个或多个方向上弯曲以改变 电网的有效焦距。 工程热塑性塑料加载高密度颗粒以便成为x射线吸收剂，同时仍保持所需的结构性能。

公开(公告)号：US06438210B1

公开(公告)日：2002-08-20

申请号：US09536850

申请日：2000-03-28

申请人： Donald Earl Castleberry

发明人： Donald Earl Castleberry

IPC分类号： G21K110

CPC分类号： G21K1/025

摘要： An anti-scatter grid for radiography includes a plurality of generally radiation absorbing elements and a plurality of generally non-radiation absorbing elements in which the generally non-radiation absorbing elements include a plurality of voids. Desirably, the non-radiation absorbing elements include an epoxy or polymeric material and a plurality of hollow microspheres. Disclosed is also an apparatus for forming an anti-scatter grid in which the apparatus includes a pivoting arm and surface for use in aligning a plurality of spaced-apart generally radiation absorbing elements relative to a radiation source.

公开(公告)号：US06324259B1

公开(公告)日：2001-11-27

申请号：US09564463

申请日：2000-05-03

申请人： Volker Lehmann ,  Wolfgang Keller

发明人： Volker Lehmann ,  Wolfgang Keller

IPC分类号： G21K110

CPC分类号： G03B42/02 ,  A61B6/027 ,  A61B6/107 ,  G21K1/025

摘要： A scattered-ray grid has a carrier with absorption elements arranged thereon in spaced rows which proceed essentially spoke-like relative to a grid center. Except for one or more rows which originate at the grid center, the individual rows of the scattered-ray grid, or of substantially identical grid sectors of the scattered-ray grid each originate from respectively different radii. The origin of each row is situated in an angle section, which is determined on the basis of at least two points lying on a circle, or an arc of circle, with a predetermined radius and which is divided in a predefined ratio for determining the position of the origin. The predetermined radius is incremented in a stepwise manner to define respective origins for all of the rows.

摘要翻译： 散射射线格栅具有载体，其吸收元件布置在间隔开的行中，相对于格栅中心基本上是辐条状的。 除了源于网格中心的一行或多行外，散射光栅格的各行或散射光栅格的基本相同的网格扇区各自分别来自不同的半径。 每行的原点位于一个角度部分中，该角度部分是基于位于圆周上的至少两个点或具有预定半径的圆弧确定的，并且以预定比例被划分以确定位置 的起源。 以逐步的方式增加预定的半径以定义所有行的相应起始点。