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首页> 外文期刊>Applied radiation and isotopes: including data, instrumentation and methods for use in agriculture, industry and medicine >Differentiation of the observed low frequency (1200MHz) EPR signals in whole human teeth.
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Differentiation of the observed low frequency (1200MHz) EPR signals in whole human teeth.

机译:在整个人类牙齿中观察到的低频(1200MHz)EPR信号的区分。

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We have determined the properties of the various signals that are observed in vivo so this information can be used to develop procedures for data acquisition and data analysis that will enable the accurate determination of radiation-induced dose with a resolution of 50cGy. Using the 1200MHz in vivo EPR spectrometer and isolated human teeth, we found four types of signals whose properties overlap, but also have some distinct properties that can be exploited to resolve them. The intrinsic background signal in human teeth differs modestly from the radiation-induced signal in g-factor, shape, and power saturation. Random noise from instrumental conditions can be reduced with signal averaging. The microphonic signal varies with the particular experimental setup and has some properties similar to real EPR signals, but is constant if the conditions are not changed. It can be suppressed by improvements in hardware and software, or subtracted.
机译:我们已经确定了体内观察到的各种信号的特性,因此该信息可用于开发数据采集和数据分析的程序,从而能够以50cGy的分辨率准确确定辐射诱导的剂量。使用1200MHz体内EPR光谱仪和孤立的人类牙齿,我们发现了四种类型的信号,它们的特性重叠,但是也具有一些可以用来解析的信号。人牙齿中的固有背景信号在g因子,形状和功率饱和方面与辐射诱导的信号略有不同。仪器平均产生的随机噪声可以通过信号平均来降低。麦克风信号会随特定的实验设置而变化,并且具有与实际EPR信号相似的某些属性,但是如果条件不变,它会保持恒定。可以通过改进硬件和软件来抑制它,也可以减去它。

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