公开(公告)号：US5706324A

公开(公告)日：1998-01-06

申请号：US626568

申请日：1996-04-02

申请人： Karl Wiesent ,  Guenter Schwierz

发明人： Karl Wiesent ,  Guenter Schwierz

IPC分类号： G01N23/04 ,  A61B6/00 ,  A61B6/12 ,  A61B90/00 ,  A61B6/03

CPC分类号： A61B6/583 ,  A61B6/501 ,  A61B90/39 ,  A61B6/12

摘要： In an x-ray computed tomography apparatus with low radiation exposure to the patient, marks are additionally imaged during scanning of the patient, by which the geometry of the image can be determined. The marks are arranged above and/or below a region of interest in the measurement field on rings and are imaged by the x-ray beam.

摘要翻译： 在具有对患者的低辐射照射的x射线计算机断层摄影装置中，在患者的扫描期间附加地标记标记，由此可以确定图像的几何形状。 标记布置在环上的测量场中的感兴趣区域的上方和/或下方，并且通过X射线束成像。

公开(公告)号：US5841831A

公开(公告)日：1998-11-24

申请号：US847622

申请日：1997-04-28

申请人： Erich Hell ,  Peter Schardt ,  Guenter Schwierz

发明人： Erich Hell ,  Peter Schardt ,  Guenter Schwierz

IPC分类号： A61B6/03 ,  G01N23/00

CPC分类号： A61B6/4028 ,  A61B6/032

摘要： In an x-ray computed tomography apparatus the source of X-rays and the detector are able to scan a volume of the examination subject in a short time. The X-ray source contains an anode that is elongated in the z-direction, on which the focus travels by a controlled deflection of an electron beam. A primary beam diaphragm is displaced synchronously with the focus movement along the anode. The diaphragm forms a pyramid-shaped X-ray beam which always fully strikes the detector but does not overshot the detector. The detector is formed by a matrix of detector elements.

摘要翻译： 在X射线计算机断层摄影装置中，X射线源和检测器能够在短时间内扫描检查对象的体积。 X射线源包含在z方向上伸长的阳极，焦点通过电子束的可控偏转行进。 主光束光阑与沿阳极的聚焦移动同步移动。 光阑形成一个金字塔形X射线束，它始终完全撞击检测器，但不会超过检测器。 检测器由检测器元件的矩阵形成。

公开(公告)号：US5029192A

公开(公告)日：1991-07-02

申请号：US584491

申请日：1990-09-18

申请人： Guenter Schwierz

发明人： Guenter Schwierz

IPC分类号： A61B6/03

CPC分类号： A61B6/035 ,  A61B6/4078 ,  A61B6/4028

摘要： A computer tomography apparatus has an x-ray source which emits a fan-shaped x-ray beam which irradiates a slice of an examination subject. The x-ray source is rotatable around the examination subject to irradiate the slice from different angular directions in the plane of the slice. A row of detector elements is disposed to receive radiation attenuated by the examination subject as the x-ray source rotates around the patient. The radiation detector is disposed on a ring which is rotatable around the examination subject separately from the x-ray source. This permits to meet the conditions of the sampling theorem, applied to the projections with the focus as projection center, without increasing the number of defectors.

摘要翻译： 计算机断层摄影装置具有X射线源，其发射照射检查对象的切片的扇形X射线束。 X射线源可以围绕检查对象旋转，以在切片的平面中从不同的角度方向照射切片。 一排检测器元件设置成在X射线源围绕患者旋转时接收被检查对象衰减的辐射。 放射线检测器设置在与x射线源分开地围绕检查对象旋转的环上。 这允许满足采样定理的条件，应用于具有焦点的投影作为投影中心，而不增加叛逃者的数量。

公开(公告)号：US4962513A

公开(公告)日：1990-10-09

申请号：US430369

申请日：1989-11-02

申请人： Guenter Schwierz ,  Joachim Kestler

发明人： Guenter Schwierz ,  Joachim Kestler

IPC分类号： A61B6/03 ,  H05G1/26 ,  H05G1/52

CPC分类号： A61B6/032 ,  A61B6/4028 ,  H05G1/26 ,  H05G1/52

摘要： A computer tomography apparatus has a circular anode and a circular radiation detector in which a patient to be examined is disposed. An electron beam from an electron gun is deflected by a beam deflection system, fed by a line voltage, so that the focus of the electron beam on the anode orbits the patient, thereby irradiating the patient from different angular positions. The radiation attenuated by the patient is recorded by the radiation detector, and corresponding electrical signals are read-out from the radiation detector by a data acquisition system, from which an image of the patient is constructed. To avoid image artifacts due to fluctuations such as ripples in the line voltage which supplies the tomography apparatus, the beam deflection system and the data acquisition system are synchronized so that, at each of n revolutions of the focus, the focus movement and the read-out of the measured values ensue slightly phase-shifted compared to the preceding revolution relative to the ripple period of the line voltage.

摘要翻译： 计算机断层摄影装置具有圆形阳极和圆形放射线检测器，其中设置待检查的患者。 来自电子枪的电子束被通过线路电压馈送的光束偏转系统偏转，使得阳极上的电子束的焦点绕着患者，从而从不同的角度位置照射患者。 由患者衰减的辐射由辐射检测器记录，并且通过数据采集系统从辐射检测器读出对应的电信号，构建患者的图像。 为了避免由于诸如提供断层摄影装置的线电压中的波纹的波动引起的图像伪影，光束偏转系统和数据采集系统被同步，使得在焦点的n转，焦点移动和读取 - 与先前相对于线电压的纹波周期的转数相比，出现的测量值略微相移。

公开(公告)号：US4176280A

公开(公告)日：1979-11-27

申请号：US886958

申请日：1978-03-15

申请人： Walter Greschat ,  Guenter Schwierz

发明人： Walter Greschat ,  Guenter Schwierz

IPC分类号： A61B6/02 ,  A61B6/03 ,  G01T1/29 ,  A61B6/00

CPC分类号： A61B6/483 ,  A61B6/032 ,  G01T1/2978

摘要： In the illustrated embodiments, detectors for receiving a fan-shaped beam are arranged in one row with dimensions to resolve a layer of maximum extent, while further detectors of the same dimensions are arranged in one or more adjacent rows and staggered relative to the first row so that the several rows provide comparable resolution for a layer of minimum extent. Thus in generating a computer tomograph of a layer of small extent (as in the neck region), the successive rows of detectors are rendered sequentially responsive to the fan shaped beam. If a physically continuously rotating detector assembly is used with mechanical lateral shifting of the x-ray detector rows into the beam path interpolation can correct for any change in the angles of the ray paths for the respective rows. By converting the x-ray beam into corresponding electronic radiation, electronic switching to successive electron detector rows may be used, thereby maintaining essentially the same focus location for each row, even with continuous rotation.

摘要翻译： 在所示的实施例中，用于接收扇形梁的检测器被布置成一排具有大小的尺寸以分辨最大程度的层，而相同尺寸的另外的检测器被布置在一个或多个相邻行中并且相对于第一行交错 使得几行为最小程度的层提供可比分辨率。 因此，在生成较小程度的层的计算机断层摄影（如在颈部区域中）时，连续的检测器行依次响应于扇形波束而呈现。 如果使用物理连续旋转的检测器组件，其中X射线检测器行的机械横向移位到光束路径内插可以校正各行的射线路径的角度的任何变化。 通过将X射线束转换成相应的电子辐射，可以使用电子切换到连续的电子检测器行，从而即使连续旋转也能为每一行维持基本相同的聚焦位置。