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    Method and system for inspecting a surface of an object with laser ultrasound
    2.
    发明授权
    Method and system for inspecting a surface of an object with laser ultrasound 失效
    用激光超声检查物体表面的方法和系统

    公开(公告)号：US5760904A

    公开(公告)日：1998-06-02

    申请号：US686873

    申请日：1996-07-26

    申请人： Peter William Lorraine ,  Ralph Allen Hewes

    发明人： Peter William Lorraine ,  Ralph Allen Hewes

    IPC分类号： G01B11/16 ,  G01H9/00 ,  G01N21/17 ,  G01N21/84 ,  G01N29/04 ,  G01N29/24 ,  G01B9/02

    CPC分类号： G01N29/2418 ,  G01B11/16 ,  G01H9/002 ,  G01N21/1717 ,  G01N29/041 ,  G01N29/069 ,  G01N2021/8472 ,  G01N2291/0258 ,  G01N2291/02827 ,  G01N2291/0422 ,  G01N2291/0423 ,  G01N2291/0427 ,  G01N2291/057 ,  G01N2291/2632

    摘要： The present invention discloses a method and system for inspecting a surface of an object with laser ultrasound. In the present invention, the surface is scanned with a source laser emitting a laser beam at a plurality of scanning positions. The emitted laser beam generates surface or Lamb waves at the plurality of scanning positions and transmits the waves throughout the surface. The surface of the object is scanned with a detector laser emitting a laser beam onto the object surface at the plurality of scanning positions. Surface displacement produced by the waves reflected from the surface is detected with a detector at each scanning position. The detected displacement at each scanning position contains signals representing a laser ultrasound waveform data set corresponding to a two-dimensional surface region along the object. The laser ultrasound waveform data sets at each scanning position are processed with a synthetic aperture focusing technique in order to generate high resolution images. The images are then inspected for defects that include cracks, disbonds, and corrosion.

    摘要翻译： 本发明公开了一种用激光超声波检测物体表面的方法和系统。 在本发明中，用在多个扫描位置发射激光束的源激光器扫描该表面。 发射的激光束在多个扫描位置处产生表面或兰姆波，并且在整个表面上传播波。 用多个扫描位置的激光束将激光发射到物体表面上的物体的表面进行扫描。 在每个扫描位置用检测器检测由表面反射的波产生的表面位移。 在每个扫描位置处检测到的位移包含表示沿着物体的二维表面区域对应的激光超声波数据集的信号。 用合成孔径聚焦技术处理每个扫描位置处的激光超声波波形数据，以产生高分辨率图像。 然后检查图像中包括裂纹，脱粘和腐蚀的缺陷。

    Radiation imaging system and method of collimation
    4.
    发明授权
    Radiation imaging system and method of collimation 有权
    辐射成像系统和准直方法

    公开(公告)号：US06647092B2

    公开(公告)日：2003-11-11

    申请号：US09683564

    申请日：2002-01-18

    申请人： Jeffrey Wayne Eberhard ,  Reinhold Franz Wirth ,  Bernhard Erich Hermann Claus ,  Ralph Allen Hewes ,  Harold John Jenkins, Jr.

    发明人： Jeffrey Wayne Eberhard ,  Reinhold Franz Wirth ,  Bernhard Erich Hermann Claus ,  Ralph Allen Hewes ,  Harold John Jenkins, Jr.

    IPC分类号： A61N510

    CPC分类号： G21K1/04

    摘要： A radiation imaging system comprises a movable radiation source adapted to be disposed in a plurality of respective radiation source positions; a radiation detector and a collimator assembly configured to displace a collimator in a plurality of respective collimator positions, each of the collimator positions being coordinated with at least one of the radiation source positions such that a radiation beam emanating from the radiation source is collimated to limit radiation incident on the detector to a predetermined exposure area. Another radiation imaging system comprises a movable radiation source; a radiation detector; and a collimator comprising an adjustable geometry aperture assembly configured such that an adjustment of the aperture geometry is synchronized with the movement of the radiation source and coordinated with the radiation source position so as to limit the incident radiation to a predetermined exposure area at the detector.

    摘要翻译： 辐射成像系统包括适于被布置在多个相应的辐射源位置中的可移动辐射源; 辐射检测器和准直器组件，被配置为使多个相应准直器位置中的准直器移位，每个准直器位置与辐射源位置中的至少一个协调，使得从辐射源发出的辐射束被准直以限制 入射到检测器上的辐射到预定的曝光区域。 另一辐射成像系统包括可移动辐射源; 辐射检测器; 以及准直器，其包括可调节几何孔组件，其被配置为使得孔径几何的调节与辐射源的运动同步，并与辐射源位置协调，以将入射辐射限制在检测器处的​​预定曝光区域。

    Apparatus and method for obtaining x-ray tomosynthesis data for mammography
    5.
    发明授权
    Apparatus and method for obtaining x-ray tomosynthesis data for mammography 有权
    用于获得乳腺摄影术的X射线断层合成数据的装置和方法

    公开(公告)号：US06375352B1

    公开(公告)日：2002-04-23

    申请号：US09409889

    申请日：1999-10-01

    申请人： Ralph Allen Hewes ,  Mehmet Yavuz

    发明人： Ralph Allen Hewes ,  Mehmet Yavuz

    IPC分类号： H05G130

    CPC分类号： A61B6/502 ,  A61B6/02 ,  A61B6/4233 ,  A61B6/588

    摘要： An apparatus and method are provided for obtaining x-ray tomosynthesis data desirable for mammography. The apparatus operates in conjunction with gravity to quickly and smoothly move an x-ray source through a plurality of positions relative to a stationary digital detector and a patient's breast to obtain a plurality x-ray images of the patient's breast which can then be processed for examination by a physician or radiologist. In one embodiment, an actuator such as a hydraulic system is operably connectable to the radiation source to controllably allow the radiation source to move under the influence of gravity from an elevated position to a lower position relative to the digital detector.

    摘要翻译： 提供了一种用于获得乳腺摄影术期望的x射线断层合成数据的装置和方法。 该装置结合重力操作，以使X射线源相对于固定数字检测器和患者的乳房快速平稳地移动多个位置，以获得患者乳房的多个x射线图像，然后可以对其进行处理 由医生或放射科医生进行检查。 在一个实施例中，诸如液压系统的致动器可操作地连接到辐射源，以可控制地允许辐射源在重力的影响下相对于数字检测器从升高位置移动到较低位置。