人类的随机参数骨剂量计模型:用于内部骨髓剂量计的儿科和成人计算骨幻象
Pavel A Sharagin1, Elena A Shishkina1,2, Evgenia I Tolstykh1
1Urals Research Center for Radiation Medicine, Chelyabinsk, Russia.
PloS one
|July 3, 2025
概括
新的随机参数骨架剂量计 (SPSD) 模型为内部剂量计提供了改进的计算幻影. 这些SPSD幻影准确地代表了不同年龄和性别的骨结构变化,增强了辐射剂量评估.
科学领域:
- 医学物理 医学物理
- 放射性剂量测量 放射性剂量测量 放射性剂量测量
- 计算生物学 计算生物学
背景情况:
- 目前基于ICRP参考幻象的活跃红骨髓 (AM) 内分量计的计算幻象具有局限性.
- 这些局限性包括,由于尸检数据稀缺,难以评估人口变异性,以及简化骨微型架构建模.
- 现有的幻影不能完全捕捉到骨结构的复杂,不均的性质.
研究的目的:
- 开发和介绍随机参数骨剂量计 (SPSD) 幻象的参数,作为当前ICRP参考幻象的替代方案.
- 创造特定于年龄和性别的骨幻象,以解释骨结构的变化和非均性.
- 提供一个工具,用于更准确的骨寻找放射性核素的内部剂量测量.
主要方法:
- 开发了SPSD建模方法,通过对真骨进行广泛的公布测量来评估骨幻影参数.
- 模拟的SPSD骨幻象在voxel表示中,包含具有统一微型架构参数的细分.
- 分段骨结构,以考虑非均的微型架构,并实现所需的声音分辨率.
主要成果:
- 介绍了各种年龄组 (新生儿到成年人,男性和女性) 和性别的SPSD骨幻象的参数.
- 开发的SPSD幻象由289个独特的部分组成,允许详细的骨建模.
- SPSD幻影特征与已发表的数据一致,并且与真实骨测量结果有很好的一致性.
结论:
- SPSD建模为ICRP内部剂量计的参考幻影提供了一个可行的替代方案.
- 这些新的年龄和性别特定的骨幻象可以更好地评估人口变异性和剂量不确定性.
- 通过模拟复杂的骨结构,SPSD方法为寻找骨的放射性核素提供了更准确的剂量测量.
相关概念视频
01:15Model Approaches for Pharmacokinetic Data: Physiological Models
117
Physiological models in pharmacokinetics are instrumental in understanding the distribution and elimination of drugs within the body. These models describe the drug concentration within target organs, influenced by factors such as drug uptake, tissue volume, and blood flow. Drug uptake is governed by the partition coefficient, which signifies the drug concentration ratio in tissue to that in the blood. The blood flow rate to a specific tissue is expressed as Qt, and the rate of change in tissue...
117
01:06Model Approaches for Pharmacokinetic Data: Distributed Parameter Models
130
Pharmacokinetic models are mathematical constructs that represent and predict the time course of drug concentrations in the body, providing meaningful pharmacokinetic parameters. These models are categorized into compartment, physiological, and distributed parameter models.
The distributed parameter models are specifically designed to account for variations and differences in some drug classes. This model is particularly useful for assessing regional concentrations of anticancer or...
The distributed parameter models are specifically designed to account for variations and differences in some drug classes. This model is particularly useful for assessing regional concentrations of anticancer or...
130
01:12Carbon Skeletons
110.5K
Life on Earth is carbon-based, as all macromolecules that make up living organisms contain carbon atoms. All organic compounds have a carbon backbone. Each carbon atom is tetravalent and can bond with four other atoms, making it an extraordinarily flexible component of biological molecules. Because carbon’s valence electrons are stable, it rarely becomes an ion. As the carbon chain increases in length, structural modifications such as ring structures, double bonds, and branching side...
110.5K