Characterization of high-sensitivity metal oxide semiconductor field effect transistor dosimeters system and LiF:Mg,Cu,P thermoluminescence dosimeters for use in diagnostic radiology
Characterization of high-sensitivity metal oxide semiconductor field effect transistor dosimeters system and LiF:Mg,Cu,P thermoluminescence dosimeters for use in diagnostic radiology
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DOI：
10.1016/s0969-8043(02)00235-x
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发表时间：
2002-12-01
影响因子：
1.6
通讯作者：
Lee, JS
中科院分区：
文献类型：
--
作者：
Dong, SL;Chu, TC;Lee, JS
在诊断射线照相程序期间监测辐射暴露最近已成为感兴趣的领域。近年来，LiF：Mg，Cu，P热释光剂量计（LiF-100 H）和高灵敏度的金属氧化物半导体场效应晶体管（MOSFET）剂量计被引入作为诊断放射学中入射皮肤剂量测量的良好候选者。在本研究中，评估的灵敏度，线性度，能量，角度依赖性，和暴露后的响应的<$-100 H和MOSFET剂量计。结果表明，该剂量计在诊断能量范围内具有良好的线性，在40 ~ 125 kVp的管电位范围内，灵敏度变化小于3%。MOSFET剂量计也观察到良好的线性，但在低剂量区的值是不太可靠的，被发现是管电位的函数。在本研究中，两种剂量计也呈现出可预测的角度依赖性。我们的研究结果表明，在低剂量的诊断程序，如胸部和颅骨投影的<$-100 H剂量计是更合适的。MOSFET剂量计系统对于腰椎投影和某些透视程序的入射皮肤剂量测量是有价值的。(C)2002爱思唯尔科技有限公司版权所有。
Monitoring radiation exposure during diagnostic radiographic procedures has recently become an area of interest. In recent years, the LiF:Mg,Cu,P thermoluminescence dosimeter (TLD-100H) and the highly sensitive metal oxide semiconductor field effect transistor (MOSFET) dosimeter were introduced as good candidates for entrance skin dose measurements in diagnostic radiology. In the present study, the TLD-100H and the MOSFET dosimeters were evaluated for sensitivity, linearity, energy, angular dependence, and post-exposure response. Our results indicate that the TLD-100H dosimeter has excellent linearity within diagnostic energy ranges and its sensitivity variations were under 3% at tube potentials from 40 Vp to 125 kVp. Good linearity was also observed with the MOSFET dosimeter, but in low-dose regions the values are less reliable and were found to be a function of the tube potentials. Both dosimeters also presented predictable angular dependence in this study. Our findings suggest that the TLD-100H dosimeter is more appropriate for low-dose diagnostic procedures such as chest and skull projections. The MOSFET dosimeter system is valuable for entrance skin dose measurement with lumbar spine projections and certain fluoroscopic procedures. (C) 2002 Elsevier Science Ltd. All rights reserved.