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公开(公告)号：US4658216A
公开(公告)日：1987-04-14
申请号：US513557
申请日：1983-07-14
摘要： A pulse processing system (10) for use in an X-ray spectrometer in which aain channel pulse shaper (12) and a fast channel pulse shaper (13) each produce a substantially symmetrical triangular pulse (f, p) for each event detected by the spectrometer, with the pulse width of the pulses being substantially independent of the magnitude of the detected event and with the pulse width of the fast pulses (p) being substantially shorter than the pulse width of the main channel pulses (f). A pile-up rejector circuit (19) allows output pulses to be generated, with amplitudes linearly related to the magnitude of the detected events, whenever the peak of a main channel pulse (f) is not affected by a preceding or succeeding main channel pulse, while inhibiting output pulses wherein peak magnitudes of main channel pulses are affected by adjacent pulses. The substantially symmetrical triangular main channel pulses (f) are generated by the weighted addition (27-31) of successive RC integrations (24, 25, 26) of an RC differentiated step wave (23). The substantially symmetrical triangular fast channel pulses (p) are generated by the RC integration ( 43) of a bipolar pulse (o) in which the amplitude of the second half is 1/e that of the first half, with the RC time constant of integration being equal to one-half the width of the bipolar pulse.
摘要翻译： 一种在X射线光谱仪中使用的脉冲处理系统（10），其中主通道脉冲整形器（12）和快速通道脉冲整形器（13）各自为检测到的每个事件产生基本上对称的三角形脉冲（f，p） 通过光谱仪，脉冲的脉冲宽度基本上与检测到的事件的大小无关，并且快速脉冲（p）的脉冲宽度明显短于主通道脉冲（f）的脉冲宽度。 每当主通道脉冲（f）的峰值不受前一个或后续的主通道脉冲（f）的影响时，堆积缓冲器电路（19）允许产生具有与检测到的事件的幅度线性相关的幅度的输出脉冲 同时抑制其中主通道脉冲的峰值幅度受相邻脉冲影响的输出脉冲。 基本对称的三角形主通道脉冲（f）通过RC差分步进波（23）的连续RC积分（24,25,26）的加权相加（27-31）产生。 基本对称的三角形快速通道脉冲（p）由双极性脉冲（o）的RC积分（43）产生，其中第二半的幅度为前半部分的幅度为1 / e，RC时间常数 积分等于双极脉冲宽度的一半。
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2.发明授权公开(公告)号：US08101919B2
公开(公告)日：2012-01-24
申请号：US12100254
申请日：2008-04-09
CPC分类号： G01T1/202 , G01T1/2008
摘要： The intrinsic background of a gamma ray spectrometer is significantly reduced by surrounding the scintillator with a second scintillator. This second (external) scintillator surrounds the first scintillator and has an opening of approximately the same diameter as the smaller central scintillator in the forward direction. The second scintillator is selected to have a higher atomic number, and thus has a larger probability for a Compton scattering interaction than within the inner region. Scattering events that are essentially simultaneous in coincidence to the first and second scintillators, from an electronics perspective, are precluded electronically from the data stream. Thus, only gamma-rays that are wholly contained in the smaller central scintillator are used for analytic purposes.
摘要翻译： 通过用第二个闪烁体围绕闪烁体，显着降低了伽马射线光谱仪的固有背景。 该第二（外部）闪烁器围绕第一闪烁体并且具有与向前方向上的较小中心闪烁体大致相同直径的开口。 选择第二个闪烁体具有较高的原子数，因此与内部区域相比，康普顿散射相互作用的概率较大。 从电子学的观点来看，与第一和第二闪烁体基本上同时重合的散射事件被电子地从数据流中排除。 因此，只有完全包含在较小中心闪烁体中的伽马射线用于分析目的。
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3.发明申请公开(公告)号：US20080251728A1
公开(公告)日：2008-10-16
申请号：US12100254
申请日：2008-04-09
IPC分类号： G01T1/20
CPC分类号： G01T1/202 , G01T1/2008
摘要： The intrinsic background of a gamma ray spectrometer is significantly reduced by surrounding the scintillator with a second scintillator. This second (external) scintillator surrounds the first scintillator and has an opening of approximately the same diameter as the smaller central scintillator in the forward direction. The second scintillator is selected to have a higher atomic number, and thus has a larger probability for a Compton scattering interaction than within the inner region. Scattering events that are essentially simultaneous in coincidence to the first and second scintillators, from an electronics perspective, are precluded electronically from the data stream. Thus, only gamma-rays that are wholly contained in the smaller central scintillator are used for analytic purposes.
摘要翻译： 通过用第二个闪烁体围绕闪烁体，显着降低了伽马射线光谱仪的固有背景。 该第二（外部）闪烁器围绕第一闪烁体并且具有与向前方向上的较小中心闪烁体大致相同直径的开口。 选择第二个闪烁体具有较高的原子数，因此与内部区域相比，康普顿散射相互作用的概率较大。 从电子学的观点来看，与第一和第二闪烁体基本上同时重合的散射事件被电子地从数据流中排除。 因此，只有完全包含在较小中心闪烁体中的伽马射线用于分析目的。
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4.发明授权
公开(公告)号：US5003980A
公开(公告)日：1991-04-02
申请号：US470420
申请日：1990-01-29
CPC分类号： A61B6/50 , A61B6/483 , A61B6/4258 , A61B6/583
摘要： The density of the lung of a patient suffering from pulmonary edema is monitored by irradiating the lung by a single collimated beam of monochromatic photons and measuring the energies of photons Compton backscattered from the lung by a single high-resolution, high-purity germanium detector. A compact system geometry and a unique data extraction scheme are utilized to monimize systematic errors due to the presence of the chestwall and multiple scattering.
摘要翻译： 通过单个准直光束的单色光子照射肺，并通过单个高分辨率，高纯度锗检测器测量从肺部向后散射的光子康普顿的能量来监测患有肺水肿的患者的肺的密度。 利用紧凑的系统几何形状和独特的数据提取方案来对由于胸壁和多次散射的存在而引起的系统误差进行调整。
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