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Potential Clinical Utility Of A Fibre Optic-coupled Dosemeter For Dose Measurements In Diagnostic Radiology

机译:光纤耦合剂量计在放射诊断剂量测量中的潜在临床实用性

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Many types of dosemeters have been investigated for absorbed dose measurements in diagnostic radiology, including ionisation chambers, metal-oxide semiconductor field-effect transistor dosemeters, thermoluminescent dosemeters, optically stimulated luminescence detectors, film and diodes. Each of the aforementioned dosemeters suffers from a critical limitation, either the need to interrogate, or read, the dosemeter to retrieve dose information or large size to achieve adequate sensitivity. This work presents an evaluation of a fibre optic-coupled dosemeter (FOCD) for use in diagnostic radiology dose measurement. This dosemeter is small, tissue-equivalent and capable of providing true real-time dose information. The FOCD has been evaluated for dose linearity, angular dependence, sensitivity and energy dependence at energies, beam qualities and beam quantities relevant to diagnostic radiology. The FOCD displayed excellent dose linearity and high sensitivity, while exhibiting minimal angular dependence of response. However, the dosemeter does exhibit positive energy dependence, and is subject to attenuation of response when bent.
机译:已经研究了许多类型的剂量计,用于放射诊断学中的吸收剂量测量,包括电离室,金属氧化物半导体场效应晶体管剂量计,热发光剂量计,光激发发光检测器,薄膜和二极管。前述剂量计中的每一个都受到关键限制,要么是询问或读取剂量计以检索剂量信息,要么是大尺寸以获得足够的灵敏度。这项工作是对用于放射诊断剂量测量的光纤耦合剂量计(FOCD)的评估。该剂量计小巧,组织等效,并且能够提供真正的实时剂量信息。评估了FOCD的剂量线性,与角度的关系,与能量相关的灵敏度和能量的依赖性,与诊断放射学有关的光束质量和光束数量。 FOCD显示出出色的剂量线性和高灵敏度,同时显示出最小的响应角依赖性。但是,剂量计确实表现出正能量依赖性,并且在弯曲时会受到响应衰减的影响。

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