公开(公告)号：US5394454A

公开(公告)日：1995-02-28

申请号：US60174

申请日：1993-05-07

Applicant: Geoffrey Harding

Inventor： Geoffrey Harding

IPC: A61B6/00 ,  G01N23/20 ,  G21K1/10 ,  G01N23/203

CPC classification number: G21K1/10

Abstract: A filter method and device for carrying out the method in conjunction with an X-ray system having a beam path for primary radiation between an X-ray source and an examination zone and a beam path for scattered radiation between the examination zone and a detector device, involve subtractive combination of first and second measurement signals produced by the detector device in response to scattered radiation received in first and second filter arrangements. For production of the first measurement signal a filter is arranged in the beam path for primary radiation and not in the beam path for scattered radiation, while for production of the second measurement signal a filter is arranged in the beam path for scattered radiation and not in the beam path for primary radiation. The latter filter consists of the same material as the filter used for the first measurement, and may be the same filter.

Abstract translation: 一种用于与X射线系统一起执行该方法的滤光器方法和装置，该X射线系统具有用于X射线源和检查区之间的初级辐射的光束路径和用于检查区域和检测器装置之间的散射辐射的光束路径 包括响应于在第一和第二滤波器装置中接收到的散射辐射而由检测器装置产生的第一和第二测量信号的减法组合。 为了生产第一测量信号，滤光器被布置在用于一次辐射的光束路径中，而不是在用于散射辐射的光束路径中，而为了产生第二测量信号，滤光器被布置在用于散射辐射的光束路径中，而不是在 用于初级辐射的光束路径。 后一个过滤器由与用于第一次测量的过滤器相同的材料组成，并且可以是相同的过滤器。

公开(公告)号：US5265144A

公开(公告)日：1993-11-23

申请号：US821511

申请日：1992-01-15

Applicant: Geoffrey Harding ,  Gerhard Martens

Inventor： Geoffrey Harding ,  Gerhard Martens

IPC: A61B6/00 ,  A61B6/02 ,  A61B6/03 ,  A61B6/06 ,  G01N23/201 ,  G21K1/02 ,  G01T1/36

CPC classification number: A61B6/483 ,  A61B6/032 ,  A61B6/4241 ,  G01N23/201 ,  G21K1/025

Abstract: An X-ray apparatus comprises a polychromatic X-ray source for generating a primary beam of small cross-section, an energy-sensitive detector arrangement for detecting the scattered radiation produced by elastic scattering processes in the primary beam, which detector arrangement comprises a plurality of detector elements which are arranged on rings concentric with the primary beam, and a collimator arrangement which is arranged between the X-ray source and the detector arrangement and which encloses the primary beam. In order to enable accurate determination of the pulse transfer spectrum while using a low dose, the collimator arrangement is constructed so that the scattered radiation from the same section of the primary beam is incident on a plurality of detector elements.

Abstract translation: X射线装置包括用于产生小截面的主光束的多色X射线源，用于检测由主光束中的弹性散射处理产生的散射辐射的能量敏感检测器装置，该检测器装置包括多个 被布置在与主光束同心的环上的检测器元件以及布置在X射线源和检测器装置之间并且包围主光束的准直器装置。 为了在使用低剂量时能够准确地确定脉冲传输光谱，准直器装置被构造成使得来自主光束的相同部分的散射辐射入射到多个检测器元件上。

公开(公告)号：US5231652A

公开(公告)日：1993-07-27

申请号：US717737

申请日：1991-06-19

Applicant: Geoffrey Harding

Inventor： Geoffrey Harding

IPC: G01N23/18 ,  G01N23/20 ,  G01N23/201 ,  G01V5/00 ,  G21K1/02

CPC classification number: G01V5/0025 ,  G01N23/201 ,  G21K1/025

Abstract: A first diaphragm arrangement is between a polychromatic X-ray radiator and an examination region for passing a primary radiation beam traversing the examination region on the generated surface of a cone. A detector arrangement comprising several detector elements receives radiation passed by the first diaphragm arrangement and a second diaphragm arrangement, which is located between the examination region and the detector arrangement and assigns to each respective detector element the scattered radiation which is scattered in a part of the primary radiation beam at a given scattering angle. The association between the individual sections of the primary radiation beam and the different detector elements is such that the second diaphragm arrangement has a slot-shaped opening and the shape of the slot-shaped opening and of the detector elements is adapted to the shape of a cross-section of the primary radiation beam.

Abstract translation: 第一隔膜布置在多色X射线辐射器和检查区域之间，用于使遍及检测区域的主辐射束穿过所生成的锥体的表面。 包括若干检测器元件的检测器装置接收由第一隔膜装置通过的辐射和位于检查区域和检测器装置之间的第二隔膜装置，并且分配给每个相应的检测器元件，散射在第 主辐射束在给定的散射角度。 主辐射束的各个部分和不同的检测器元件之间的关联使得第二光阑装置具有槽形开口，并且槽形开口和检测器元件的形状适合于 主辐射束的横截面。

公开(公告)号：US4956856A

公开(公告)日：1990-09-11

申请号：US252955

申请日：1988-10-03

Applicant: Geoffrey Harding

Inventor： Geoffrey Harding

IPC: A61B6/03 ,  G01N23/201 ,  G01N23/203 ,  G01V5/00

CPC classification number: G01V5/0025 ,  G01N23/201

Abstract: The invention relates to an arrangement for examining a body comprising a radiation source for producing a primary beam of small cross-section, means for producing a relative displacement between the body on the one hand and the primary beam on the other hand, a detector device sensing the radiation elastically scattered at small scattering angles and means for determining the scattering angle and or the momentum. In an embodiment, a spatial resolution in the direction of the primary beam can be obtained in that several diaphragm lamellae are arranged between the body and the detector device in such a manner that scattered radiation from different sections of the primary beam each time strikes different strips on the surface of the detector device and in that the detector has a lateral resolution in the longitudinal direction of the strips. In another embodiment, a gamma camera is employed as the detector device.

Abstract translation: 本发明涉及一种用于检查主体的装置，其包括用于产生小横截面的主光束的辐射源，用于在一方面在主体和主光束之间产生相对位移的装置，另一方面，检测器装置 感测以小散射角弹性散射的辐射，以及用于确定散射角和/或动量的装置。 在一个实施例中，可以获得在主光束方向上的空间分辨率，即在主体和检测器装置之间设置若干隔膜薄片，使得来自主光束的不同部分的散射辐射每次都朝向不同条带 在检测器装置的表面上，并且检测器在条的纵向上具有横向分辨率。 在另一个实施例中，伽马照相机被用作检测器装置。

公开(公告)号：US4850002A

公开(公告)日：1989-07-18

申请号：US92805

申请日：1987-09-03

Applicant: Geoffrey Harding ,  Josef-Maria Kosanetzky ,  Ulrich Neitzel

Inventor： Geoffrey Harding ,  Josef-Maria Kosanetzky ,  Ulrich Neitzel

IPC: A61B6/00 ,  A61B6/02 ,  G01N23/20

CPC classification number: A61B6/483 ,  G01N23/20066

Abstract: The invention relates to a method of determining the Compton profile of an object to be examined which is situated in an examination zone. The examination zone is irradiated by a monochromatic primary beam whose energy is chosen so that the attenuation of the primary radiation is due essentially only to the Compton Scattering. The scattered radiation is measured in an energy resolving manner and therefrom, as well as from the attenuation in the primary beam, the Compton profiles for the individual pixels in the examination zone are determined.

Abstract translation: 本发明涉及一种确定位于检查区中的被检查物体的康普顿特征的方法。 检查区域被选择能量的单色主光束照射，使得主辐射的衰减基本上仅仅归因于康普顿散射。 散射的辐射是以能量分辨方式测量的，并且从主波束的衰减中测量出检查区域中各个像素的康普顿曲线。

公开(公告)号：US4785401A

公开(公告)日：1988-11-15

申请号：US909807

申请日：1986-09-22

Applicant: Geoffrey Harding ,  Josef-Maria Kosanetzky

Inventor： Geoffrey Harding ,  Josef-Maria Kosanetzky

IPC: G01N23/203 ,  G01N23/06 ,  G01N23/201

CPC classification number: G01N23/06

Abstract: A method and apparatus for measurement of an energy-independent attenuation factor in a predetermined area of a primary X-ray beam which passes through a test object. Two detectors measure scattered radiation on closely adjacent paths in each of two different spectral ranges. The attenuation factor is calculated from the difference of the logarithms of quotients of measurements taken at different engergies.

Abstract translation: 一种用于测量通过测试对象的主X射线束的预定区域中与能量无关的衰减因子的方法和装置。 两个检测器在两个不同光谱范围的每一个中测量紧密相邻路径上的散射辐射。 衰减因子是根据在不同工作时进行的测量值的商数的对数计算的。

公开(公告)号：US4516261A

公开(公告)日：1985-05-07

申请号：US203163

申请日：1980-11-03

Applicant: Geoffrey Harding ,  Erhard Klotz

Inventor： Geoffrey Harding ,  Erhard Klotz

IPC: A61B6/00 ,  A61B6/02 ,  G01N23/04 ,  G02B27/42 ,  H04N5/32 ,  G06K9/00

CPC classification number: A61B6/025 ,  G01N23/046 ,  H04N5/32 ,  G01N2223/419 ,  Y10S378/901

Abstract: A device for reducing artefacts in layer images. Several layer images are formed of an object layer by irradiation from different directions. The same points of these layer images are compared in order to obtain a corrected layer image: when corresponding image information is present in all image points compared, the image information is transferred to corresponding layer image points in a corrected layer image; when the image information in the compared image points is not the same, that information is at least partly suppressed.

Abstract translation: 用于减少层图像中的人为因素的装置。 通过不同方向的照射由物体层形成几层图像。 比较这些层图像的相同点以获得校正层图像：当在所比较的所有图像点中存在相应的图像信息时，图像信息被传送到校正图像图像中的相应层图像点; 当比较图像点中的图像信息不相同时，该信息被至少部分地抑制。

公开(公告)号：US4384209A

公开(公告)日：1983-05-17

申请号：US164109

申请日：1980-06-30

Applicant: Wolfgang Wagner ,  Geoffrey Harding

Inventor： Wolfgang Wagner ,  Geoffrey Harding

IPC: G01N23/04 ,  A61B6/02 ,  A61B6/03 ,  G01B15/04 ,  A61B6/00

CPC classification number: A61B6/483 ,  A61B5/1079 ,  A61B6/032

Abstract: When only a part of a body slice to be examined, for example, a separate organ, is irradiated by means of a fan-shaped radiation beam during computer tomography, it is necessary to know the body contour in order to enable reconstruction. The body contour can be determined by means of radiation scattered in the body. The scattered radiation is measured, in a direction which deviates from the direction of the X-rays of the fan-shaped beam, along scattered radiation paths which do not intersect each other in the positioning zone. On the basis of the detected scattered radiation, the scattered radiation path which is situated most far from the center of the examination zone is selected, after which the position of the scattered radiation path within the fan-shaped radiation beam, and hence within the positioning zone, is recorded. After the recording of all scattered radiation paths for the different directions of the fan-shaped radiation beam, the contour of the body slice to be examined is determined from the recorded positions of the scattered radiation paths.

Abstract translation: 当在计算机断层摄影期间仅通过扇形辐射束照射要检查的身体切片的一部分例如单独的器官时，需要知道身体轮廓以便能够进行重建。 身体轮廓可以通过散射在体内的辐射来确定。 沿着与扇形光束的X射线的方向偏离的方向沿着在定位区域中不相交的散射辐射路径被测量散射的辐射。 在检测到的散射辐射的基础上，选择最靠近检查区中心的散射辐射路径，之后散射辐射路径在扇形辐射束内的位置，因此在定位 区域，被记录。 在对扇形辐射束的不同方向记录所有分散的辐射路径之后，根据散射辐射路径的记录位置确定要检查的身体切片的轮廓。