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    • 14. 发明申请
    • METHOD AND APPARATUS FOR EXAMINING TISSUE BY TRANSILLUMINATION USING NEAR INFRARED LIGHT
    • 通过使用近红外光照射透射检查组织的方法和装置
    • WO1994024927A1
    • 1994-11-10
    • PCT/CA1993000441
    • 1993-10-19
    • TAM, Paul, Y.WOO, George, H.WU, George, G.YEUNG, Henry, P.LIU, Chang-Xing
    • TAM, Paul, Y.WOO, George, H.WU, George, G.YEUNG, Henry, P.
    • A61B05/00
    • A61B5/0091A61B5/4312G01N21/3563G01N21/359G01N2021/1772
    • A method of automatically generating a standardized image of an illuminated object uses a transillumination apparatus comprising a light probe (10) having a light source (62) emitting a scattered light beam, a CCD camera (12) having a lens aperture for controlling the amount of light received by the CCD camera (12) and an amplifier for amplifying an output signal proportional to the amount of light received by the CCD camera, a computer processing system (38) and a monitor. The method comprises the steps of illuminating an object with the scattered light beam; collecting the light beam with a CCD camera (12) after the light beam has passed throught the object; transforming the collected light into an image having a mean grey scale and displaying the image on a monitor; comparing grey scale of the image with a pre-assigned upper threshold and lower threshold and generating a plurality of control signals to automatically regulate the opening of the lens aperture, the gain of the CCD camera and the brightness of the light source until the mean grey scale of the image lies within the preassigned upper threshold and lower threshold.
    • 自动生成被照明物体的标准化图像的方法使用包括具有发射散射光束的光源(62)的光探针(10)的透照装置,具有用于控制量的透镜孔的CCD照相机(12) 由CCD摄像机(12)接收的光和用于放大与由CCD照相机接收的光量成比例的输出信号的放大器,计算机处理系统(38)和监视器。 该方法包括用散射光束照射物体的步骤; 在光束通过物体之后,用CCD照相机(12)收集光束; 将收集的光转换成具有平均灰度的图像并在监视器上显示图像; 将图像的灰度级与预先分配的上阈值和下阈值进行比较,并产生多个控制信号以自动调节透镜孔径的开度,CCD照相机的增益和光源的亮度,直到平均灰度 图像的尺度在预先设定的上限阈值和下限阈值之内。