Fluence-to-dose conversion coefficients from monoenergetic neutrons below 20 MeV based on the VIP-Man anatomical model
Fluence-to-dose conversion coefficients from monoenergetic neutrons below 20 MeV based on the VIP-Man anatomical model
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DOI：
10.1088/0031-9155/45/10/321
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发表时间：
2000-10-01
影响因子：
3.5
通讯作者：
Xu, XG
中科院分区：
文献类型：
--
作者：
Bozkurt, A;Chao, TC;Xu, XG
使用从国家医学图书馆可视人体项目（R）的高分辨率横向彩色摄影图像开发的全身解剖模型VIP-Man，计算了20 MeV以下中子的一组新的注量率-吸收剂量和注量率-有效剂量转换系数。使用蒙特卡罗程序MCNP对20束1 × 10（-9）MeV和20 MeV之间的单能中子束在6种不同的照射几何形状下进行器官剂量计算：前-后、后-前、右侧、左侧、旋转和各向同性。24个主要器官的吸收剂量和有效剂量的结果的基础上，现实的VIP人，并与那些基于简化的MIRD为基础的幻影在文献中报道。有效剂量从VIP人是没有显着不同，从早期的结果中子的能量范围内研究。然而，由于基于图像的模型和早期的数学模型之间的解剖差异，器官剂量存在显着偏差。
A new set of fluence-to-absorbed dose and fluence-to-effective dose conversion coefficients have been calculated for neutrons below 20 MeV using a whole-body anatomical model, VIP-Man, developed from the high-resolution transverse colour photographic images of the National Library of Medicine's Visible Human Project(R). Organ dose calculations were performed using the Monte Carlo code MCNP for 20 monoenergetic neutron beams between 1 x 10(-9) MeV and 20 MeV under six different irradiation geometries: anterior-posterior, posterior-anterior, right lateral, left lateral, rotational and isotropic. The absorbed dose for 24 major organs and effective dose results based on the realistic VIP-Man are presented and compared with those based on the simplified MIRD-based phantoms reported in the literature. Effective doses from VIP-Man are not significantly different from earlier results for neutrons in the energy range studied. There are, however, remarkable deviations in organ doses due to the anatomical differences between the image-based and the earlier mathematical models.