公开(公告)号：US06980626B2

公开(公告)日：2005-12-27

申请号：US10621501

申请日：2003-07-17

申请人： Burkhard Groh ,  Volker Heer ,  Mathias Hörnig ,  Bernhard Sandkamp

发明人： Burkhard Groh ,  Volker Heer ,  Mathias Hörnig ,  Bernhard Sandkamp

IPC分类号： A61B6/00 ,  A61B6/02 ,  G01N23/201

CPC分类号： A61B6/4441 ,  A61B6/4014 ,  A61B6/483 ,  A61B6/5235 ,  A61B6/5282

摘要： Method for an x-ray arrangement for compensation of scattered radiation and x-ray apparatusThe invention concerns a method for an x-ray arrangement comprising two x-ray systems (1, 2) for compensation of scattered radiation. In addition, the invention concerns an x-ray apparatus with two x-ray systems (1, 2) which respectively comprise an x-ray source (4, 5) and an x-ray detector (5, 7). An x-ray scattered radiation image based on the x-ray radiation (11) scattered on a subject (P) is acquired for at least one of the two x-ray systems (1, 2), given a definite positioning of the x-ray systems (1, 2) relative to one another. The acquired x-ray scattered radiation image is saved and used for subtraction from an x-ray image acquired with the x-ray system (1, 2) in order to compensate for the influence of the scattered radiation originating from the other x-ray system (1, 2) and to achieve an improved image quality.

摘要翻译： 用于补偿散射辐射和x射线装置的X射线装置的方法本发明涉及一种用于补偿散射辐射的两个x射线系统（1,2）的x射线装置的方法。 另外，本发明涉及具有分别包括x射线源（4,5）和x射线检测器（5,7））的两个x射线系统（1,2）的X射线设备。 对于两个x射线系统（1,2）中的至少一个，获取基于散射在被摄体（P）上的x射线辐射（11）的X射线散射辐射图像，给定x 射线系统（1,2）相对于彼此。 所获取的X射线散射辐射图像被保存并用于从由x射线系统（1,2）获取的X射线图像中减去，以便补偿源自其它x射线的散射辐射的影响 系统（1，2），并实现了改进的图像质量。

公开(公告)号：US5265144A

公开(公告)日：1993-11-23

申请号：US821511

申请日：1992-01-15

申请人： Geoffrey Harding ,  Gerhard Martens

发明人： Geoffrey Harding ,  Gerhard Martens

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

CPC分类号： A61B6/483 ,  A61B6/032 ,  A61B6/4241 ,  G01N23/201 ,  G21K1/025

摘要： 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.

摘要翻译： 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：US4850002A

公开(公告)日：1989-07-18

申请号：US92805

申请日：1987-09-03

申请人： Geoffrey Harding ,  Josef-Maria Kosanetzky ,  Ulrich Neitzel

发明人： Geoffrey Harding ,  Josef-Maria Kosanetzky ,  Ulrich Neitzel

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

CPC分类号： A61B6/483 ,  G01N23/20066

摘要： 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.

摘要翻译： 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：US4550419A

公开(公告)日：1985-10-29

申请号：US543208

申请日：1983-10-19

申请人： Horst Aichinger ,  Paul Marhoff ,  Manfred Pfeiler

发明人： Horst Aichinger ,  Paul Marhoff ,  Manfred Pfeiler

IPC分类号： A61B6/02 ,  G21K1/02 ,  H05G1/64 ,  A61B6/00 ,  H04N5/32

CPC分类号： A61B6/483 ,  A61B6/5258 ,  G21K1/025 ,  H05G1/64

摘要： The invention relates to a diagnostic radiology setup with means for suppressing stray radiation and with an image intensifier television chain with image storing means. There is provided a perforated diaphragm of radiation-absorbing material near the tube, which diaphragm can be introduced into the ray path selectively. Two image memories for an X-ray picture with a diaphragm and an X-ray picture without a diaphragm and an image processing system serve for comparing the image information of the two X-ray pictures to determine and eliminate the stray radiation component.

摘要翻译： 本发明涉及具有用于抑制杂散辐射的装置和具有图像存储装置的图像增强器电视链的诊断放射学装置。 在管附近设置有辐射吸收材料的穿孔隔膜，该隔膜可以选择性地引入射线路径。 用于具有隔膜的X射线照片和没有光阑的X射线照片的两个图像存储器和用于比较两个X射线照片的图像信息的图像处理系统用于确定和消除杂散辐射分量。

公开(公告)号：US4419763A

公开(公告)日：1983-12-06

申请号：US269423

申请日：1981-06-01

申请人： Eric G. Hawman

发明人： Eric G. Hawman

IPC分类号： A61B6/02 ,  G01T1/164 ,  G21F5/04 ,  G21K1/02

CPC分类号： A61B6/483 ,  A61B6/4258 ,  G01T1/1642 ,  G21F5/04 ,  G21K1/025

摘要： A collimator is disclosed which has a stack of radiation opaque plates that is tilted to vary the angle of view of the scintillation crystal of a radiation detector with respect to a radiation source. The plates have hexagonal apertures that are aligned with corresponding apertures on adjacent plates to provide radiation transmitting channels. As the stack is tilted, the plates slide laterally over one another to change the slant of the channels.

摘要翻译： 公开了一种准直器，其具有一叠辐射不透明板，其倾斜以相对于辐射源改变辐射检测器的闪烁晶体的视角。 板具有与相邻板上的相应孔对准的六边形孔，以提供辐射透射通道。 当堆叠倾斜时，板彼此横向滑动以改变通道的倾斜。

公开(公告)号：US4384209A

公开(公告)日：1983-05-17

申请号：US164109

申请日：1980-06-30

申请人： Wolfgang Wagner ,  Geoffrey Harding

发明人： Wolfgang Wagner ,  Geoffrey Harding

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

CPC分类号： A61B6/483 ,  A61B5/1079 ,  A61B6/032

摘要： 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.

摘要翻译： 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。

公开(公告)号：US3937965A

公开(公告)日：1976-02-10

申请号：US518889

申请日：1974-10-29

申请人： Jean Pierre Vasseur

发明人： Jean Pierre Vasseur

IPC分类号： A61B6/00 ,  A61B6/02 ,  A61B6/03 ,  G03B42/02 ,  G01T1/20 ,  G02B5/00 ,  G21K1/02

CPC分类号： A61B6/4225 ,  A61B6/032 ,  A61B6/483 ,  A61B6/501 ,  G03B42/02

摘要： A novel apparatus for radiographic examination purposes comprises an x-ray source emitting a flat beam. Detectors are arranged in the plane of the beam in order each to pick up part of the beam. To avoid the Compton effect, each detector is associated with it an auxiliary detector which only receives the rays emitted by the Compton effect. An electrical circuit forms a predetermined linear combination of the signals respectively picked up by each detector and the associated auxiliary detector, this in order to prevent the errors which are due to the Compton effect when the beam passes through the body being analysed.

摘要翻译： 用于射线照相检查目的的新型装置包括发射平坦光束的x射线源。 检测器被布置在梁的平面中，以便每个拾取梁的一部分。 为了避免康普顿效应，每个检测器与它相关联一个辅助检测器，它只接收康普顿效应发射的光线。 电路形成由每个检测器和相关联的辅助检测器分别拾取的信号的预定线性组合，以便防止当光束通过被分析的身体时由于康普顿效应而引起的误差。

公开(公告)号：US3106640A

公开(公告)日：1963-10-08

申请号：US6090560

申请日：1960-10-06

申请人： OLDENDORF WILLIAM H

发明人： OLDENDORF WILLIAM H

IPC分类号： A61B6/00 ,  A61B6/02 ,  A61B6/03 ,  G01N23/08 ,  G21K5/10 ,  H01J35/14 ,  H01J35/30

CPC分类号： H01J35/30 ,  A61B6/032 ,  A61B6/4441 ,  A61B6/483 ,  G01N23/083 ,  H01J35/14

公开(公告)号：US11986336B2

公开(公告)日：2024-05-21

申请号：US17979061

申请日：2022-11-02

申请人： KONINKLIJKE PHILIPS N.V.

发明人： Chuanyong Bai ,  Yang-Ming Zhu ,  Sheng Lu ,  Shiyu Xu ,  Hao Dang ,  Hao Lai ,  Douglas McKnight ,  Hui Wang

IPC分类号： A61B6/00 ,  A61B6/03 ,  G06N3/08 ,  G16H30/40

CPC分类号： A61B6/52 ,  A61B6/032 ,  G06N3/08 ,  G16H30/40 ,  A61B6/483

摘要： A non-spectral computed tomography scanner includes a radiation source configured to emit x-ray radiation, a detector array configured to detect x-ray radiation and generate non-spectral data, and a memory configured to store a spectral image module that includes computer executable instructions including a neural network trained to produce spectral volumetric image data. The neural network is trained with training spectral volumetric image data and training non-spectral data. The non-spectral computed tomography scanner further includes a processor configured to process the non-spectral data with the trained neural network to produce spectral volumetric image data.

公开(公告)号：US11911204B2

公开(公告)日：2024-02-27

申请号：US17577335

申请日：2022-01-17

申请人： FUJIFILM CORPORATION

发明人： Takahiro Kawamura

IPC分类号： A61B6/00

CPC分类号： A61B6/5282 ,  A61B6/4266 ,  A61B6/4291 ,  A61B6/461 ,  A61B6/483 ,  A61B6/505 ,  A61B6/5205

摘要： At least one standard image representing a standard object having different thicknesses, the at least one standard image being obtained by imaging the standard object by radiation in a state in which an object is interposed between the standard object and a radiation detector is acquired, a relationship between the thickness of the standard object and a radiation attenuation coefficient of the standard object, which corresponds to an energy characteristic of the radiation, the relationship reflecting an influence of beam hardening by the standard object and the object, is derived, a primary ray component corresponding to the thickness of the standard object included in the standard image is derived based on the relationship between the thickness of the standard object and the radiation attenuation coefficient of the standard object, a scattered ray component corresponding to the thickness of the standard object included in the standard image is derived based on a difference between the standard image and the primary ray component, and a scattered ray model representing a relationship between the thickness of the standard object and a ratio of the scattered ray component to the primary ray component is derived.