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3D打印的聚乳酸用于X射线剂量分析的人类幻影适用性:模拟和测量研究
Donghee Han1, Toshioh Fujibuchi2
1Division of Medical Quantum Science, Department of Health Sciences, Faculty of Medical Sciences, Kyushu University, 3-1-1 Maidashi, Higashi-Ku, Fukuoka, 812-8582, Japan.
Radiological physics and technology
|April 29, 2025
概括
这项研究探索了利用蒙特卡洛模拟和放射光发光剂量测量在3D打印的多乳酸幻体中吸收的剂量. 结果显示了良好的一致性,有助于开发用于辐射剂量测量的人类相当的幻影.
科学领域:
- 医学物理 医学物理
- 材料科学 材料科学 材料科学
- 放射性成像学成像技术
背景情况:
- 先进的3D打印能够制造出用于放射性成像评估的人类幻影.
- 聚乳酸 (PLA) 是用于3D打印应用的常见丝材.
- 准确的剂量测量对于诊断和治疗放射学程序至关重要.
研究的目的:
- 为了研究诊断X射线能量范围内的3D打印的PLA幻体中吸收的剂量.
- 将蒙特卡洛模拟与实验测量进行比较,使用放射光发光玻璃剂量测量系统.
- 评估充填百分比和X射线能量对吸收剂量分布的影响.
主要方法:
- 制造具有不同填充百分比 (20-100%) 的PLA幻象.
- 放射性成像用于视觉验证幻影完整性.
- 蒙特卡洛模拟使用Geant4 Tomographic排放和粒子和重离子运输代码系统的应用.
- 使用放射光发光玻璃剂量测量系统进行实验剂量测量.
主要成果:
- 蒙特卡洛模拟显示与实验结果有很好的一致性,在不同的kVp设置下平均差异为2.6-3.1%.
- 在一致条件下,实验不确定性约为1%.
- 吸收剂量在较低的管电压和较低的充填百分比下降更显著,与模拟相比,平均误差为6.2%.
结论:
- 这些发现支持开发基于光线的,相当于人类的幻影用于辐射剂量测量.
- 高密度光纤材料对各种与辐射相关的设备具有前景.
- 该研究为优化影像设计和放射成像中的剂量测量精度提供了有价值的数据.
相关概念视频
01:10X-ray Diffraction of Biological Samples
X-ray diffraction or XRD is an analytical tool that utilizes X-rays to study ordered structures such as crystalline organic and inorganic samples, polycrystalline materials, proteins, carbohydrates, and drugs.
According to Bragg's law, when X-rays strike the sample positioned on a stage, the rays are scattered by the electron clouds around the sample atoms. The X-ray diffraction or scattering is caused by constructive interference of the X-ray waves that reflect off the internal crystal...
According to Bragg's law, when X-rays strike the sample positioned on a stage, the rays are scattered by the electron clouds around the sample atoms. The X-ray diffraction or scattering is caused by constructive interference of the X-ray waves that reflect off the internal crystal...
01:24X-ray Imaging
German physicist Wilhelm Röntgen (1845–1923) was experimenting with electrical current when he discovered that a mysterious and invisible "ray" would pass through his flesh but leave an outline of his bones on a screen coated with a metal compound. In 1895, Röntgen made the first durable record of the internal parts of a living human: an "X-ray" image (as it came to be called) of his wife’s hand. Scientists worldwide quickly began their own experiments with X-rays, and by 1900, X-ray was widely...