Design and fabrication of a multipurpose thyroid phantom for medical dosimetry and calibration
Abstract
A multipurpose anthropomorphic neck phantom was designed and fabricated for use in medical applications. The designed neck phantom is composed of seven elliptic cylindrical slices with a semi-major axis of 14 cm and a semi-minor axis of 12.5 cm, each having the thickness of 2 cm. The thyroid gland, bony part of the neck, and the windpipe were also built inside the neck phantom. For the purpose of medical dosimetry, some holes were drilled inside the phantom to accommodate the thermoluminescence dosemeters with different shapes and dimensions. For testing the quality of images in nuclear medicine, the thyroid gland was built separately to accommodate the radioactive iodine. Finally, the nuclear medicine images were obtained by inserting 131I in both male and female thyroid parts.
首先基本确定设计一个体模的文章，体模是颈部体模，用来针对I-131的情况。七个椭圆柱切片，半长轴14cm，半短轴12.5cm.每个切片厚度2cm.包含了甲状腺，骨头部分和气管。为了用于医学领域，还在体模内部钻孔，保证能将不同型号尺寸的TLD放进去。为了用于医学成像的质量测试，将甲状腺单独分离建造，从而适应放射性I的导入情况。分别作了男性和女性的甲状腺部分，将I-131导入从而进行核医学成像。
总体来看，设计的思路较为清晰，可以作为体模设计的参考。