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    • 71. 发明授权
    • Radiation beam scanner
    • 辐射束扫描仪
    • US5621214A
    • 1997-04-15
    • US541374
    • 1995-10-10
    • Jack C. Sofield
    • Jack C. Sofield
    • A61N5/10G01T1/185G01T1/29
    • G01T1/2914G01T1/185G01T1/2964A61N2005/1076A61N5/1048
    • A radiation beam scanner system employs a peak detection methodology to measure the intensity and distribution of radiation produced by a medical linear accelerator. The scanner system combines the capability to perform scanning measurements with the capability to perform high accuracy calibrations of the linear accelerator. The system employs two ion chamber detectors, signal and reference, with the signal detector positioned within a tank of water (phantom tank). As the water is irradiated by the linear accelerator, the signal detector is continuously moved within the water by means of electrical stepper motors as the reference detector remains stationary at some point within the radiation beam. The reference detector output is compared to a predetermined threshold and, when the threshold is reached, a peak detector circuit monitors the signal detector output for a radiation pulse peak. Accelerator anomalies are eliminated by calculating a ratio of the signal detector output to the reference detector output. Each ratio is time tagged and correlated to signal detector position information, thereby providing a map of the distribution and intensity of the radiation within the water. The resultant data is evaluated by a qualified medical physicist to ascertain the accelerator's suitability for use in dosimetry. In one embodiment, the pulse frequency of the accelerator is determined and the rate of signal detector movement (scan rate) is set as a function of the pulse frequency of the accelerator. The system includes a unique, integrating, auto-zeroing, calibration electrometer that can be employed to calibrate the accelerometer.
    • 辐射束扫描器系统采用峰值检测方法来测量由医用线性加速器产生的辐射的强度和分布。 扫描仪系统将执行扫描测量的能力与执行线性加速器的高精度校准相结合。 该系统采用两个离子室检测器,信号和参考,信号检测器位于水箱(幻影池)内。 当水被线性加速器照射时,信号检测器借助于电动步进电机在水中连续移动,因为参考检测器在辐射束内的某个点保持静止。 将参考检测器输出与预定阈值进行比较,并且当达到阈值时,峰值检测器电路监测信号检测器输出的辐射脉冲峰值。 通过计算信号检测器输出与参考检测器输出的比例来消除加速器异常。 每个比率被时间标记并与信号检测器位置信息相关联,从而提供水中辐射的分布和强度的图。 所得数据由合格的医学物理学家评估,以确定加速器在剂量测定中的适用性。 在一个实施例中,确定加速器的脉冲频率,并且将信号检测器移动速率(扫描速率)设置为加速器的脉冲频率的函数。 该系统包括一个独特的积分自动归零校准静电计,可用于校准加速度计。
    • 72. 发明授权
    • Method of scanning an X-ray image by means of electrometer probes, and
device for performing the method
    • 通过电子探针扫描X射线图像的方法,以及用于执行该方法的装置
    • US5077765A
    • 1991-12-31
    • US614800
    • 1990-11-14
    • Walter HillenStephan RuppUlrich Schiebel
    • Walter HillenStephan RuppUlrich Schiebel
    • G01B15/00A61B6/00G01T1/29G03B42/02H04N5/30
    • G01T1/2921G01T1/2964
    • A plurality of electrometer probes (3, 4, 5, 6) scan charge patterns of a photoconductor (1) which is locally uniformly charged prior to the X-ray exposure and is discharged by the exposure in dependence on the intensity of the X-rays. The surface of the photoconductor is scanned after the exposure in order to determine the charge density, the electrometer probes (3, 4, 5, 6) forming for each pixel a pixel value which corresponds to the discharge at the relevant pixel to compensate for sensitivity fluctuations of the electrometer probes included is a calibration operation for the sensitivity of all electrometer probes in that two probes (3, 4, 5, 6) scan an identical section (a.sub.1 . . . d.sub.3) of the image, their relative sensitivity used for correcting the pixel values is derived from comparison of the resultant output signals of the probes (3, 4, 5, 6).
    • 多个静电计探针(3,4,5,6)扫描在X射线曝光之前局部均匀充电的光电导体(1)的电荷图案,并且通过曝光放电,依赖于X射线 射线 在曝光后扫描光电导体的表面以确定电荷密度,为每个像素形成对应于相关像素处的放电以补偿灵敏度的像素值的静电计探针(3,4,5,6) 包括的静电计探针的波动是所有静电计探针的灵敏度的校准操作,因为两个探针(3,4,5,6)扫描图像的相同部分(a1 ... d3),其相对灵敏度用于 通过比较所得到的探针(3,4,5,6)的输出信号,导出像素值的校正。
    • 73. 发明授权
    • Automatic radiochromatagram strip scanner
    • 自动放射性色带条扫描仪
    • US4110615A
    • 1978-08-29
    • US851926
    • 1977-11-16
    • Robert L. McCann
    • Robert L. McCann
    • G01T1/29G01T1/00
    • G01T1/2964
    • Apparatus for automatically scanning processed radiochromatagram strips. The apparatus comprises a carrier wheel having a processed chromatagram mounted on the periphery thereof by a strip of plastic tape. The wheel carries the processed chromatagram past a radiation detector. Photoelectric means are provided to provide signals indicative of the position of the carrier wheel. The apparatus includes electrical circuitry responsive to the signals produced by the radiation detector to provide a numerical display of the total radioactivity detected along the entire strip and for providing a numerical display of the radioactivity detected along a selected portion of the strip. A strip chart recorder is provided in the apparatus to produce a graphical display of the spectral distribution of the radioactivity along the entire strip. The apparatus includes logic means for controlling the functions of the apparatus to provide a completely automated system.
    • 用于自动扫描处理后的放射色谱条的装置。 该装置包括承载轮,该承载轮具有通过塑料条带安装在其外围的经处理的色差图。 轮子通过辐射探测器运送经过处理的色谱图。 提供光电装置以提供指示承载轮的位置的信号。 该装置包括响应于由辐射检测器产生的信号的电路,以提供沿整个条带检测到的总放射性的数值显示,并提供沿条带的选定部分检测的放射性的数值显示。 在该装置中提供条形图记录器以产生沿整个条带的放射性的光谱分布的图形显示。 该装置包括用于控制装置的功能以提供完全自动化的系统的逻辑装置。
    • 77. 发明公开
    • TOMOGRAPHIEANLAGE UND VERFAHREN FÜR GROSSVOLUMIGE AUFNAHMEN
    • 用于大容量记录的层析摄影系统和方法
    • EP3162290A1
    • 2017-05-03
    • EP16191079.9
    • 2016-09-28
    • Siemens Healthcare GmbH
    • Divoky, Robert
    • A61B6/02A61B6/03A61B6/00
    • G01T1/2985A61B6/025A61B6/032A61B6/4014A61B6/4441G01N21/6456G01N23/046G01N2201/1035G01N2223/419G01T1/2964
    • Die Erfindung betrifft eine Tomographieanlage (R) mit einer ersten Strahlquelle (Q1) und einem ersten Detektor (RD1), der der ersten Strahlquelle (Q1) zugeordnet ist, sowie mit einer zweiten Strahlquelle (Q2) und einem zweiten Detektor (RD2), der der zweiten Strahlquelle (Q2) zugeordnet ist. Die Tomographieanlage (R) ist dazu vorbereitet, einen Scan durchzuführen, wobei der erste Detektor (RD1) in einer ersten Rotationsebene (RE1) entlang einer ersten kreissegmentförmigen Bahnkurve (BKD1) geführt wird, während der zweite Detektor (RD2) synchron in einer zweiten Rotationsebene (RE2) entlang einer zweiten kreissegmentförmigen Bahnkurve (BKD2) geführt wird. Außerdem ist die Tomographieanlage (R) dazu vorbereitet, hierbei mit dem ersten Detektor (RD1) einen ersten Datensatz (DS1) und mit dem zweiten Detektor (RD2) einen zweiten Datensatz (DS2) zu gewinnen. Die beiden Rotationsebenen (RE1, RE2) sind zueinander beabstandet angeordnet.
      Die Erfindung betrifft auch ein entsprechendes Verfahren (100) zum Betreiben einer Tomographieanlage (R).
    • 本发明涉及一种成像系统(R)与第一光束源(Q1)和与所述第一光束源(Q1),以及与第二束源(Q2)和第二检测器(RD2)相关联的第一检测器(RD1)中, 与第二束源(Q2)相关联。 所述断层摄影系统(R)是准备执行扫描,其中,所述在(RE1)沿第一圆弧段形路径曲线(BKD1)旋转的第一平面的第一检测器(RD1)被引导,而所述第二检测器(RD2),其与所述第二同步地旋转平面 (RE2)沿着第二圆形段形轨迹(BKD2)被引导。 另外,准备层析成像系统(R)以获得具有第一检测器(RD1)的第一数据集(DS1)和具有第二检测器(RD2)的第二数据集(DS2)。 两个旋转平面(RE1,RE2)彼此间隔一定距离排列。 本发明还涉及用于操作断层摄影系统(R)的对应方法(100)。
    • 80. 发明公开
    • X-ray imaging system
    • BILDERZEUGUNGSSYSTEM MITTELSRÖNTGENSTRAHLEN
    • EP0933651A3
    • 2003-01-15
    • EP99300411.8
    • 1999-01-20
    • Edge Medical Devices Ltd.
    • Zur, Albert
    • G01T1/24
    • G01T1/2018G01T1/246G01T1/2964
    • The present disclosure presents an apparatus for radiation detection comprising a generally uniform dielectric layer, a conductive layer interfacing a first surface of the generally uniform dielectric layer; an ionizing radiation detection multi-layer structure including a photoelectric conversion layer interfacing a second surface of the generally uniform dielectric layer; said ionizing radiation detection multi-layer structure, said generally uniform dielectric layer, and said conductive layer being configured with respect to each other and being operative such that an imagewise ionizing radiation pattern impinging on said ionizing radiation detection multi-layer substrate causes a corresponding charge pattern representing said imagewise ionizing radiation to be generated at the interface between the generally uniform dielectric layer and the photoelectric conversion layer and causes a readable imagewise replica of said charge pattern to be formed in said conductive layer.
    • 本公开提供了一种用于辐射检测的装置,其包括大致均匀的介电层,与大致均匀的电介质层的第一表面接合的导电层; 电离辐射检测多层结构,其包括与大致均匀的介电层的第二表面接合的光电转换层; 所述电离辐射检测多层结构,所述大致均匀的电介质层,并且所述导电层相对于彼此配置并且可操作,使得照射在所述电离辐射检测多层衬底上的成像电离辐射图形成相应的电荷 图案表示将在大致均匀的电介质层和光电转换层之间的界面处产生的所述成像电离辐射,并且使所述电荷图案的可读图像复制品形成在所述导电层中。