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    • 2. 发明授权
    • Apparatus and method for detecting radiation that uses a stimulate phosphor
    • 用于检测使用刺激性荧光体的辐射的装置和方法
    • US06479829B1
    • 2002-11-12
    • US09511913
    • 2000-02-23
    • Masaki Katagiri
    • Masaki Katagiri
    • G01T110
    • G01T1/20G01T1/2012G01T1/2014
    • Radiation doses ranging from a very weak level to a very high instantaneous level can be monitored real-time by, a differential and integral type of radiation measuring apparatus in a convenient and precise manner using a stimulable phosphor as a radiation detecting medium. The radiation detecting portion comprises in planar superposition a bundle of laterally radiating optical fibers, a stimulable phosphor, an optical filter centered at the wavelength of fluorescence, and a-bundle of wavelength shifting optical fibers sensitive to the wavelength of stimulated fluorescence. On the basis of two actions of the stimulable phosphor, one for emitting stimulated fluorescence in proportion to the dose of incident radiation upon illumination with exciting light and the other for emitting prompt fluorescence upon excitation by the incident radiation, the radiation detecting portion selectively detects stimulated fluorescence and prompt fluorescence at specified time intervals. A saturation check circuit monitors the fluorescence detecting mechanism at specified time intervals to see if it is saturated by high-intensity radiation and after it is recovered from saturation, the dose of rapid intense radiation is read with the quantity of exciting light on the stimulable phosphor being altered to ensure radiation measurement without saturation of the fluorescence detecting mechanism. To read the dose of radiation, the stimulable phosphor is illuminated with pulsed exciting light having a short time duration and the emission of stimulated fluorescence is detected with a photodetector, amplified with a charge-sensitive preamplifier, waveform shaped with a pulse shaping amplifier and passed through an analog/digital converter to provide pulse height data, which is processed by a data collecting and processing circuit to determine the dose of radiation accumulated in the stimulable phosphor.
    • 通过使用可激发的荧光体作为辐射检测介质,以方便和精确的方式,通过差分和整体式的辐射测量装置可以实时监测从非常弱的水平到非常高的瞬时水平的辐射剂量。 放射线检测部分包括平面叠加一束横向辐射光纤,可刺激的荧光体,以荧光波长为中心的滤光器,以及对受激荧光的波长敏感的一束波长移动光纤。 基于可刺激荧光粉的两种动作,一种用于在用激发光照射时与入射辐射剂量成比例地发射受激荧光,另一种用于在通过入射辐射激发时发射迅速荧光,辐射检测部分选择性地检测刺激的荧光 以规定的时间间隔荧光和迅速荧光。 饱和度检查电路以规定的时间间隔监测荧光检测机构,以观察其是否被高强度辐射饱和,并且在从饱和度恢复之后,以可激发的荧光体上的激发光量读取快速强辐射的剂量 被改变以确保辐射测量而不饱和荧光检测机构。 为了读取辐射剂量,可以用短时间持续时间的脉冲激发光照射可刺激的荧光体,用光电检测器检测激发荧光的发射,用电荷敏感前置放大器放大,用脉冲整形放大器形成波形,并通过 通过模拟/数字转换器提供脉冲高度数据,其由数据收集和处理电路处理以确定累积在可刺激磷光体中的辐射剂量。
    • 4. 发明授权
    • Radiation image read-out apparatus
    • 辐射图像读出装置
    • US06507040B2
    • 2003-01-14
    • US09823979
    • 2001-04-03
    • Yuji Isoda
    • Yuji Isoda
    • G01T110
    • G01T1/2014
    • In a radiation image read-out apparatus, the line sensor has a light receiving face whose width in the transverse direction of the line portion of the stimulable phosphor sheet exposed to the line stimulating beam is such that 30% to 90% of the amount of stimulated emission corresponding to a part of the stimulated emission spreading beyond the width of the line stimulating light beam as measured on the plane of the light receiving face of the stimulated emission detecting means can be received by the light receiving face in addition to the amount of stimulated emission corresponding to the width of the line stimulating light beam.
    • 在放射线图像读取装置中,线传感器具有受光面,该受光面在曝光于线刺激光束的可刺激荧光体片的线部分的宽度方向上的宽度为30〜90% 与受激发射检测装置的光接收面的平面上测量的刺激光束宽度相比,受激发射的一部分的受激发射除了受光面以外,还可以被光接收面接收 受激发射对应于线刺激光束的宽度。
    • 6. 发明授权
    • Optical detection system
    • 光学检测系统
    • US06759662B1
    • 2004-07-06
    • US09744626
    • 2001-01-26
    • Sam Fong Yau Li
    • Sam Fong Yau Li
    • G01T110
    • G01N27/44782G01N27/44721
    • An optical detection system comprising an electromagnetic radiation source, a source radiation focusing and collimating means, a photodetector, an emitted radiation focusing means and a source radiation blocking panel. The radiation source is used to direct source radiation onto a sample which is disposed in a sample platform. The source radiation focusing and collimating means is disposed between the radiation source and the sample for focusing and collimating the source radiation onto the sample. The photodetector is adapted for receiving radiation emitted from the sample which has been focused by the emitted radiation focusing means. The source radiation blocking panel, disposed between the source radiation focusing and collimating means and the sample, is unique in that it is capable of reducing light scattering and interference, such that a clear signal from each individual sample can be obtained by the photodetector.
    • 一种光学检测系统,包括电磁辐射源,源辐射聚焦和准直装置,光电检测器,发射的辐射聚焦装置和源辐射阻挡面板。 辐射源用于将源辐射引导到设置在样品平台中的样品上。 源辐射聚焦和准直装置设置在辐射源和样品之间,用于将源辐射聚焦并准直到样品上。 光电检测器适于接收由已发射的辐射聚焦装置聚焦的样品发射的辐射。 设置在源辐射聚焦和准直装置和样品之间的源极辐射阻挡面板是独特的,因为其能够减少光散射和干涉,使得可以通过光电检测器获得每个单独样品的清晰信号。