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    X-ray image encoding by spatial modulation of a storage phosphor screen
    1.
    发明授权
    X-ray image encoding by spatial modulation of a storage phosphor screen 失效
    通过存储荧光屏的空间调制的X射线图像编码

    公开(公告)号：US5289012A

    公开(公告)日：1994-02-22

    申请号：US877893

    申请日：1992-04-30

    Applicant: Robert E. Alvarez

    Inventor： Robert E. Alvarez

    IPC: H05G1/26 ,  G03B42/02 ,  G01N23/04

    CPC classification number: H05G1/26

    Abstract: Multiple x-ray images are encoded onto a single storage phosphor screen detector for later scanning, processing, and viewing. The x-ray images are encoded using spatial frequency multiplexing onto high frequency carriers. The encoding process relies only on light with no mechanical motion. The light erases selected portions of the image data but leaves sufficient information to reconstruct the original images. The reconstruction process relies on conventional sampling theory with the additional step of solving a system of equations for the individual x-ray image information.

    Abstract translation: 多个X射线图像被编码在单个存储荧光屏检测器上，用于随后的扫描，处理和观看。 x射线图像使用空间频率复用进行高频载波编码。 编码过程仅依赖于没有机械运动的光。 光消除图像数据的所选部分，但留下足够的信息来重建原始图像。 重建过程依赖于常规采样理论，其中还有一个解决单个x射线图像信息方程组的步骤。

    Energy selective X-ray system with low noise
    3.
    发明授权
    Energy selective X-ray system with low noise 有权
    能量选择性X射线系统噪声低

    公开(公告)号：US08929508B1

    公开(公告)日：2015-01-06

    申请号：US13448856

    申请日：2012-04-17

    Applicant: Robert E. Alvarez

    Inventor： Robert E. Alvarez

    IPC: G01N23/00 ,  G01D18/00 ,  G01N23/087

    CPC classification number: G01N23/087 ,  G01N2223/423

    Abstract: An apparatus or method for providing information about an object from x-ray radiation transmitted through the object. An embodiment comprises an x-ray source (10) positioned on one side of an object (50) an x-ray detector (102) positioned on the opposite side, and means for computing two or more information signals, which are substantially the line integrals of the basis set coefficients of the x-ray attenuation coefficient from the x-ray photons transmitted through said object at three or more regions of the x-ray energy spectrum. In one embodiment the means for computing the two or more information signals comprises a linear maximum likelihood estimator (122), a correction processor (142) to compute a correction to the linear maximum likelihood estimate (132), and an adder (152) to add the estimate and the correction to produce the two or more information signals (154).

    Abstract translation: 一种用于从通过物体传输的X射线辐射提供关于物体的信息的装置或方法。 实施例包括位于物体（50）的位于相对侧的X射线检测器（102）的一侧上的x射线源（10），以及用于计算两条或更多条信息信号的装置，其基本上为线 在X射线能谱的三个或更多个区域，通过所述物体透射的x射线光子的x射线衰减系数的基准系数的积分。 在一个实施例中，用于计算两个或多个信息信号的装置包括线性最大似然估计器（122），用于计算对线性最大似然估计（132）的校正的校正处理器（142），以及加法器 添加估计和校正以产生两个或更多个信息信号（154）。

    Active energy selective x-ray image detection
    4.
    发明授权
    Active energy selective x-ray image detection 失效
    有源能量选择性X射线图像检测

    公开(公告)号：US5221843A

    公开(公告)日：1993-06-22

    申请号：US872788

    申请日：1992-04-23

    Applicant: Robert E. Alvarez

    Inventor： Robert E. Alvarez

    IPC: G01N23/04 ,  G03B42/02 ,  H05G1/26

    CPC classification number: H05G1/26 ,  G01N23/043 ,  G03B42/02

    Abstract: An apparatus and method for energy selective x-ray image detection. A source produces two fluxes of x-ray radiation with two different energy spectra. The fluxes are sequentially incident on the subject then on two layered planar detectors with control means. Examples of planar detectors are stimulable phosphor screens or intensifying screen/photographic film detectors. Examples of control means are visible light sources or electric generators with stimulable phosphor screens or light valves with intensifying screen/film detectors. A sequencer uses control means to selectively enhance the response of a predetermined detector to corresponding sequential radiation flux. The predetermined response can be chosen to enhance the inherent energy selectivity of the layered detector e.g. the first detector preferentially responds to low energy while the second detector preferentially responds to high energy x-ray photons. Planar detectors are used so that the layered detector fits in a cassette compatible with film cassettes used in medical radiography.

    Abstract translation: 一种用于能量选择性X射线图像检测的装置和方法。 源产生两个具有两个不同能量谱的x射线辐射通量。 焊剂顺序地入射到被检体上，然后在具有控制装置的两层平面检测器上。 平面检测器的示例是可刺激的荧光屏或增强屏/摄影胶片检测器。 控制装置的示例是具有可激发荧光屏的可见光源或发电机或具有增强的屏/膜检测器的光阀。 定序器使用控制装置来选择性地增强预定检测器对相应顺序辐射通量的响应。 可以选择预定响应以增强分层检测器的固有能量选择性，例如。 第一检测器优先响应低能量，而第二检测器优先响应高能x射线光子。 使用平面检测器，使得分层检测器适合于与用于医学放射照相术中的胶片盒兼容的盒。

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