用于碘-125种子眼膜剂量测定的固体体模材料。
Solid phantom material for the dosimetry of iodine-125 seed ophthalmic plaques.
作者信息
Hermann K P, Alberti W, Tabor P, Pothmann B, Divoux S, Harder D
机构信息
Institut für Medizinische Physik und Biophysik, Universität Göttingen, Germany.
出版信息
Int J Radiat Oncol Biol Phys. 1993 Aug 1;26(5):897-901. doi: 10.1016/0360-3016(93)90507-r.
PURPOSE
A tissue-equivalent solid phantom material, RE-1, closely simulating the radiological attenuation and scattering properties of the human eye for the iodine-125 photon spectrum and their Compton-scattered secondary photons, was fabricated on a polyethylene base with CaCO3 and MgO as inorganic additives.
METHODS AND MATERIALS
A 24 mm diameter spherical phantom was made from 1.1 mm thick sheets of RE-1, and holes were drilled in which 1 mm3 TLD cubes were placed.
RESULTS
The radial dose function g(r), which determines the dose profile on the transverse axis, was measured in a quasi-infinite phantom of RE-1.
CONCLUSION
The values obtained deviate only slightly from those for a quasi-infinite phantom made from water-equivalent material.
目的
一种组织等效固体模体材料RE-1，以聚乙烯为基底，添加碳酸钙和氧化镁作为无机添加剂制成，它能紧密模拟人眼对碘-125光子能谱及其康普顿散射次级光子的放射衰减和散射特性。
方法与材料
用1.1毫米厚的RE-1板材制作了一个直径24毫米的球形模体，并钻出小孔，在其中放置1立方毫米的热释光剂量计（TLD）立方体。
结果
在RE-1的准无限模体中测量了确定横轴剂量分布的径向剂量函数g(r)。
结论
所得值与由水等效材料制成的准无限模体的值仅略有偏差。
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