Response of LiF powder to 125I photons.
Response of LiF powder to 125I photons.
复制标题
LiF 粉末对 125I 光子的响应。
DOI：
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发表时间：
1984
期刊：
影响因子：
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通讯作者：
K. Weaver
中科院分区：
文献类型：
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作者：
K. Weaver
125I种子被用于治疗多种疾病，包括脑肿瘤。然而，125I光子的LiF能量响应相对于兆压辐射的不确定性限制了该材料剂量测定的准确性。用12颗40-mCi 125I粒子阵列照射一次性胶囊中的LiF粉末，并用离子室测量吸收剂量。将这些LiF剂量计的反应与给予类似剂量的60Co辐射的胶囊的反应进行比较，得出125I的LiF反应相对于60Co的反应为1.39 +/- 0.03（对水的剂量）和1.32 +/- 0.03（对肌肉的剂量）。详细的程序和不确定度的来源进行了讨论。
125I seeds are being used to treat a variety of diseases, including brain tumors. However, the uncertainty in the energy response of LiF for 125I photons relative to megavoltage radiation limits the accuracy of dosimetry with this material. An array of 12 40-mCi 125I seeds was used to irradiate LiF powder in throwaway capsules, and an ion chamber was used to measure the absorbed dose. A comparison of the response of these LiF dosimeters with the response of capsules given a similar dose of 60Co radiation has yielded values of 1.39 +/- 0.03 (dose to water) and 1.32 +/- 0.03 (dose to muscle) for the LiF response for 125I relative to that for 60Co. Details of the procedure and sources of uncertainty are discussed.