Nomura Kiyoshi, Takahashi Masashi, Fujibuchi Toshioh, Koike Yuya, Hara Masayuki, Higaki Shogo, Kobayashi Ikuo, Yoshino Souichirou
Radio-Isotope Research Laboratory, Tokyo Medical University, Shinjuku 6-1-1, Shinjuku-ku, Tokyo, 160-8402, Japan.
Radio-Isotope Research Laboratory, Tokyo Medical University, Shinjuku 6-1-1, Shinjuku-ku, Tokyo, 160-8402, Japan.
Appl Radiat Isot. 2023 Apr;194:110720. doi: 10.1016/j.apradiso.2023.110720. Epub 2023 Feb 9.
A 1.2 m flexible liquid scintillation light guide (LSLG) detector connected to a portable electric device was developed and applied to monitor X-rays scattered from a panoramic dental X-ray imaging apparatus. The X-ray absorption of the LSLG tube was simulated for 20 and 40 keV X-rays. The LSLG detector was calibrated by comparing doses measured by a 3-inch NaI(Tl) detector using Am-241 and Cs-137 sources. A linear relationship was obtained between dose rates (μSv/h) and count rates (cps). The elapsed time profile of scattered radiation from a panoramic dental X-ray imaging apparatus was determined. Local absorbed doses were measured with small OSL dosimeters on the LSLG tube suspended over the shoulder and the eyeglass. Behind the ears and neck (in the center of the LSLG tube) showed high doses. The LSLG detector was useful for real-time monitoring of scattered X-rays.
开发了一种连接到便携式电子设备的1.2米柔性液体闪烁光导（LSLG）探测器，并将其应用于监测全景牙科X射线成像设备散射的X射线。针对20 keV和40 keV的X射线模拟了LSLG管的X射线吸收。通过比较使用Am-241和Cs-137源的3英寸NaI（Tl）探测器测量的剂量来校准LSLG探测器。在剂量率（μSv/h）和计数率（cps）之间获得了线性关系。确定了全景牙科X射线成像设备散射辐射的时间历程。使用小型OSL剂量计在悬挂在肩部和眼镜上方的LSLG管上测量局部吸收剂量。耳朵后面和颈部（LSLG管的中心）显示出高剂量。LSLG探测器可用于实时监测散射的X射线。
