Investigation of the Magas Normoxic Polymer Gel Dosimeter with Pyrex Glass Walls for Clinical Radiotherapy Dosimetry
Investigation of the Magas Normoxic Polymer Gel Dosimeter with Pyrex Glass Walls for Clinical Radiotherapy Dosimetry
复制标题
用于临床放射治疗剂量测定的 Pyrex 玻璃壁 Magas 常氧聚合物凝胶剂量计的研究
DOI：
10.1016/j.nima.2005.09.002
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发表时间：
2005
影响因子：
--
通讯作者：
C. Baldock
中科院分区：
文献类型：
--
作者：
A. Venning;K. Nitschke;B. Healy;C. Baldock
用含抗坏血酸(MAGAS)聚合物凝胶剂量计测量了6 MV光子束的深度剂量，并与蒙特卡罗EGS4程序计算的深度剂量和水中电离室测量的深度剂量进行了比较。聚合物凝胶、蒙特卡罗和电离室深度剂量之间的差异高达4%。在聚合物凝胶深度剂量测量中，用电离室在不同厚度的PYREX玻璃下进行测量，以确定PYREX玻璃体模墙体材料的校正因子。在应用放射深度定标和校正因子后，与水中电离室测量的一致性程度在3%以内。聚合物凝胶在玻璃瓶中的R2剂量响应在25Gy线性范围内。MAGAS聚合物凝胶剂量计已显示出作为临床放射治疗工具的潜力，用于深度剂量的评估。需要进行进一步的调查，以充分发展其能力，并减少与其他剂量测量系统的测量差异。
Depth doses for a 6MV photon beam have been measured with the Methacrylic Acid Gelatin with AScorbic acid (MAGAS) polymer gel dosimeter contained in a cylindrical Pyrex glass phantom and Pyrex glass tubes and compared with depth doses calculated using Monte Carlo EGS4 code and ionisation chamber measurements in water. Differences between the polymer gel, Monte Carlo and ionisation chamber depth doses were up to 4%. Measurements were performed with an ionisation chamber under different thicknesses of Pyrex glass to determine correction factors for the Pyrex glass phantom wall material in the polymer gel measurement of depth dose. With radiological depth scaling and correction factors applied, the extent of agreement with ionisation chamber measurements in water was within 3%. The R2-dose response of the polymer gel in glass vials was linear up to 25Gy. The MAGAS polymer gel dosimeter has shown potential as a clinical radiotherapy tool for the evaluation of depth dose. Further investigation is required to fully develop its capabilities and to reduce differences with measurements made with other dosimetry systems.
影响因子：
2.5
作者：
MARYANSKI, MJ;GORE, JC;SCHULZ, RJ
通讯作者：
SCHULZ, RJ