Evaluation of corrective methods of measurement of accidental irradiation dose using in vivo ESR

用L频段电子自旋共振波谱仪测量了人离体牙的电子自旋共振背景信号。血沉信号强度平均值为0.017014±0.011049 A.U。(任意单位)。直方图分析表明背景信号的分布服从对数正态分布。我们证实，牙科诊断X射线成像仪的连续照射产生了L波段血沉光谱仪可探测到的血沉信号。提示诊断性牙科X线机等医疗照射主要产生人体牙齿的ESR背景信号。作为一种校正方法，增加一定的信号强度似乎是可以接受的方法。

The measurement of ESR background signals from human isolated teeth using L-band ESR spectrometer was carried out. The average of the ESR signal intensity was 0.017014±0.011049 a.u. (arbitrary units). The histogram analysis revealed that the distribution of the background signals obeyed a log-normal distribution. We confirmed that the serial irradiation by a diagnostic dental X-ray imager generates detectable ESR signals by L-band ESR spectrometer. It is suggested that medical exposures e.g. diagnostic dental X-ray imager mainly generate ESR background signal in human teeth. The addition of certain signal intensity seems to be acceptable procedure as a correction method.