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OPTIMIZING THE TLD-100H READOUT SYSTEM UNDER VARIOUS RADIOACTIVE I-131 DOSES VIA THE REVISED TAGUCHI DYNAMIC QUALITY LOSS FUNCTION
Journal of Mechanics in Medicine and Biology ( IF 0.8 ) Pub Date : 2020-12-08 , DOI: 10.1142/s0219519420400242
LUNG-FA PAN, YINGYI LE, YU-CHEN YEN, JUI-HUNG WENG, CHIEN-YI CHEN, CHUN-CHIEH LIANG, LUNG-KWANG PAN

The TLD-100H readout system performance under various radioactive I-131 exposure doses was optimized by four key factors via the revised Taguchi dynamic quality loss function. Taguchi dynamic analysis and the orthogonal array reorganizing the essential factors are crucial for the optimization of the thermoluminescent dosimeter (TLD) readout system given strict criteria of multiple irradiated environments and long-term exposure for calibrated TLDs. Accordingly, 96 TLD-100H chips were selected and randomly categorized into three batches with eight groups (four TLD chips in each group). Four factors, namely (1) initial temperature, (2) heating rate, (3) maximal temperature, and (4) TLD preheat time before reading were organized into eight combinations according to Taguchi suggestion, whereas each factor was preset at two levels. All 96 [Formula: see text] chips were put in three concentric circles with 30, 60, and 90 cm radii for 48 h, surrounding the radioactive 150[Formula: see text]mCi ([Formula: see text][Formula: see text]MBq) I-131 capsule and exposed to the cumulative doses of 88.2, 18.6, and 8.6[Formula: see text]mSv for the respective radii, accordingly. The TLD readings obtained from each group were analyzed to derive the sensitivity, coincidence, and reproducibility, then those were reorganized to draw four fish-bone-plots for the optimization. The optimal option for the TLD readout system implied the combination of A1 (a [Formula: see text]C initial temperature), B1 (a [Formula: see text]C/s heating rate), C1 (a [Formula: see text]C maximal temperature), and D2 (a 15[Formula: see text]s preheat time), which was further verified by the follow-up measurements. The dominant factors were A (initial temperature) and B (heating rate), whereas C (maximal temperature) and D (preheat time) were minor and provided negligible contributions to the system performance optimization.

中文翻译:

通过修改后的田口动态质量损失函数在各种放射性 I-131 剂量下优化 TLD-100H 读出系统

通过修改后的田口动态质量损失函数,TLD-100H 读出系统在各种放射性 I-131 暴露剂量下的性能通过四个关键因素进行了优化。考虑到多重辐照环境和校准 TLD 的长期暴露的严格标准,田口动态分析和重组基本因素的正交阵列对于优化热致发光剂量计 (TLD) 读出系统至关重要。因此,选择了 96 个 TLD-100H 芯片并随机分为三批八组(每组四个 TLD 芯片)。根据田口的建议,将(1)初始温度、(2)升温速率、(3)最高温度和(4)TLD读取前预热时间四个因素组织成八个组合,而每个因素预设两个水平。全部 96 [公式:见正文] 将芯片放入三个半径分别为 30、60 和 90 cm 的同心圆中 48 小时,围绕放射性 150[公式:见正文]mCi ([公式:见正文][公式:见正文]MBq) I -131 胶囊并相应地暴露于 88.2、18.6 和 8.6[公式:见文本]mSv 的累积剂量。分析从每组获得的 TLD 读数以得出灵敏度、一致性和可重复性,然后重新组织这些读数以绘制四个鱼骨图以进行优化。TLD 读出系统的最佳选项意味着 A1(a [公式:参见文本]C 初始温度)、B1(a [公式:参见文本]C/s 加热速率)、C1(a [公式:参见文本)的组合]C 最高温度)和 D2(15[公式:见正文]s 的预热时间),这通过后续测量得到了进一步验证。
更新日期:2020-12-08
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