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42 条记录 (耗时 0.019 秒)

    Computer tomograph with a multi-stage charge-integrated read amplifier
    2.
    发明授权
    Computer tomograph with a multi-stage charge-integrated read amplifier 失效
    具有多级电荷集成读取放大器的计算机断层扫描仪

    公开(公告)号：US06429718B1

    公开(公告)日：2002-08-06

    申请号：US09469334

    申请日：1999-12-22

    申请人： Josef Lauter ,  Stefan Schneider ,  Herfried K. Wieczorek

    发明人： Josef Lauter ,  Stefan Schneider ,  Herfried K. Wieczorek

    IPC分类号： G06F764

    CPC分类号： H03G3/001

    摘要： The invention relates to a computer tomograph provided with a charge-integrating read amplifier having a plurality of gain factors for a data acquisition system as well as a control circuit for the gain factor. In order to avoid noise in addition to the shot noise in computer tomographs of this kind and also to avoid degrading of the DQE (Detection Quantum Efficiency), according to the invention it is proposed that the control circuit automatically selects the gain factor in dependence on the expected integrated input signal of the next frame, the expectation being based on the maximum possible relative variation of the integrated input signal between two successive frames.

    摘要翻译： 本发明涉及具有电荷积分读取放大器的计算机断层摄影机，该放大器具有用于数据采集系统的多个增益因子以及用于增益因子的控制电路。 为了避免这种计算机断层扫描中的散粒噪声以及除了DQE（检测量子效率）的劣化之外的噪声，根据本发明，提出了控制电路根据 预期下一帧的积分输入信号，期望是基于两个连续帧之间的积分输入信号的最大可能的相对变化。

    Computer tomograph detector
    3.
    发明授权
    Computer tomograph detector 失效
    计算机断层扫描仪

    公开(公告)号：US06292528B1

    公开(公告)日：2001-09-18

    申请号：US09428770

    申请日：1999-10-28

    申请人： Herfried Wieczorek ,  Josef Lauter ,  Stefan Schneider

    发明人： Herfried Wieczorek ,  Josef Lauter ,  Stefan Schneider

    IPC分类号： A61B600

    CPC分类号： A61B6/032 ,  A61B6/4085 ,  G01T1/202 ,  G01T1/2985

    摘要： A computer tomograph detector for the detection of electromagnetic radiation transmitted by an object, which detector includes at least one detector row which consists of a plurality of detector elements, each detector element including a scintillator for converting radiation of a first energy level into radiation of a second energy level, as well as a photosensor for converting the radiation into an electrical current, each photosensor being associated with an amplifier element, is extended in such a manner that it can include a plurality of detector rows while the electronic noise is nevertheless reduced and at the same time a higher DQE is obtained; this is achieved by arranging a plurality of photosensors and the associated amplifier elements on the same substrate in integrated semiconductor technique.

    摘要翻译： 一种用于检测由物体发射的电磁辐射的计算机断层摄影检测器，该检测器包括由多个检测器元件组成的至少一个检测器行，每个检测器元件包括用于将第一能级的辐射转换成辐射的闪烁体， 第二能级，以及用于将辐射转换成电流的光电传感器，每个与放大器元件相关联的光传感器以这样的方式被扩展，使得它可以包括多个检测器行，同时电子噪声仍然减少， 同时获得更高的DQE; 这是通过在集成半导体技术中在相同的衬底上布置多个光电传感器和相关联的放大器元件来实现的。

    Computed tomography apparatus
    5.
    发明授权
    Computed tomography apparatus 有权
    计算机断层摄影仪

    公开(公告)号：US06324244B1

    公开(公告)日：2001-11-27

    申请号：US09668910

    申请日：2000-09-25

    申请人： Josef Lauter ,  Stefan Schneider ,  Herfried Karl Wieczorek

    发明人： Josef Lauter ,  Stefan Schneider ,  Herfried Karl Wieczorek

    IPC分类号： A61B603

    CPC分类号： H03M1/186 ,  Y10S378/901

    摘要： The invention relates to a computed tomography apparatus which includes a radiation source, a detector device and an analog-to-digital converter for converting the detector output signals into digital values. In order to realize a computed tomography apparatus in which the number of binary positions required for the encoding of the signal entering the analog-to-digital converter is reduced while using simple components which operate with a high degree of reliability, use is made of a read-out amplifier (1) which precedes the analog-to-digital converter (10), has a plurality of gain factors and a control system (12) for the relevant gain factor which, when a predetermined limit value of the integrated input signal is reached, automatically selects an appropriate, each time lower gain factor for the step-wise linear approximation of a proportional ratio between the digital values and the square root of the detector output signals.

    摘要翻译： 本发明涉及一种计算机断层摄影装置，其包括辐射源，检测器装置和用于将检测器输出信号转换成数字值的模拟 - 数字转换器。 为了实现计算机断层摄影装置，其中使用以高可靠性操作的简单组件来减少进入模数转换器的信号的编码所需的二进制位置的数量，使用 在模拟 - 数字转换器（10）之前的读出放大器（1）具有多个增益因子和用于相关增益因子的控制系统（12），当所述积分输入信号的预定极限值 自动选择适当的每次较低的增益因子，用于数字值与检测器输出信号的平方根之间的比例比的逐级线性近似。

    Grid for the absorption of X-rays
    6.
    发明授权
    Grid for the absorption of X-rays 失效
    网格吸收X射线

    公开(公告)号：US06363136B1

    公开(公告)日：2002-03-26

    申请号：US09671987

    申请日：2000-09-28

    申请人： Peter Flisikowski ,  Stefan Schneider ,  Josef Lauter ,  Herfried Karl Wieczorek

    发明人： Peter Flisikowski ,  Stefan Schneider ,  Josef Lauter ,  Herfried Karl Wieczorek

    IPC分类号： G21K100

    CPC分类号： G21K1/025

    摘要： In order to increase the ruggedness and the scattered radiation attenuation quality, a grid (3) with comb elements (12) which absorb electromagnetic radiation and are intended to form a grid is constructed, in such a manner that comb lamellae (11) extend transversely of an associated comb base surface which supports the comb lamellae (11).

    摘要翻译： 为了增加粗糙度和散射辐射衰减质量，构造了具有吸收电磁辐射并且旨在形成网格的梳形元件（12）的网格（3），使得梳形片（11）横向延伸 的相关的梳基表面，其支撑梳板（11）。

    Device and method for forming a computed X-ray tomogram with scatter correction
    8.
    发明授权
    Device and method for forming a computed X-ray tomogram with scatter correction 有权
    用散射校正形成计算的X射线断层图的装置和方法

    公开(公告)号：US06639964B2

    公开(公告)日：2003-10-28

    申请号：US09963300

    申请日：2001-09-26

    申请人： Stefan Schneider ,  Josef Lauter ,  Herfried Karl Wieczorek ,  Olaf Such

    发明人： Stefan Schneider ,  Josef Lauter ,  Herfried Karl Wieczorek ,  Olaf Such

    IPC分类号： G01N2300

    CPC分类号： A61B6/032 ,  A61B6/4291 ,  G01T1/1642

    摘要： The invention relates to a method for scatter correction while forming a computed X-ray tomogram. The distribution of the scattered radiation is determined by detector cells (7′) which, because of the measuring method carried out, are shielded from direct irradiation in a two-dimensional, multi-cell detector field (3). This distribution is used to perform a scatter correction in the neighboring, directly irradiated detector cells (7). Furthermore, scatter correction can be performed by computer simulation of the scatter processes. To this end, use is preferably made of a Monte Carlo method and the effect of the geometry and the material composition of the measuring arrangement, of the patient size, of the irradiated tissue and the like, is taken into account.

    摘要翻译： 本发明涉及一种在形成计算的X射线断层图像时进行散射校正的方法。 散射辐射的分布由检测器单元（7'）确定，其由于执行的测量方法在二维多单元检测器场（3）中被屏蔽而不被直接照射。 该分布用于在相邻的直接照射的检测器单元（7）中执行散射校正。 此外，可以通过散射过程的计算机模拟来执行散射校正。 为此，优选使用蒙特卡罗方法，并考虑了测量装置的几何形状和材料组成，患者体积，照射组织等的影响。

    Detector for the detection for electromagnetic radiation
    9.
    发明授权
    Detector for the detection for electromagnetic radiation 失效
    检测器用于电磁辐射检测

    公开(公告)号：US06452186B1

    公开(公告)日：2002-09-17

    申请号：US09621518

    申请日：2000-07-21

    申请人： Herfried Wieczorek ,  Stefan Schneider ,  Josef Lauter

    发明人： Herfried Wieczorek ,  Stefan Schneider ,  Josef Lauter

    IPC分类号： G01T100

    CPC分类号： G01T1/2018 ,  G01T1/2002

    摘要： The invention relates to a detector for the detection of electromagnetic radiation (6, 9), including scintillators (S1-S5), a photosensor device (F1-F5) and an intermediate layer (10). The optical crosstalk due to multiple reflection in the intermediate layer is prevented in that at least parts of the intermediate layer (10) contain substances absorbing electromagnetic radiation (9).

    摘要翻译： 本发明涉及一种用于检测包括闪烁体（S1-S5），光电传感器装置（F1-F5）和中间层（10）的电磁辐射（6,9）的检测器。 由于中间层（10）的至少一部分含有吸收电磁辐射（9）的物质，所以防止了由于中间层的多次反射引起的光学串扰。