用于 X 射线成像的 3D 打印微晶 CsI:Tl 复合闪烁薄膜

IF 1.6 3区物理与天体物理 Q2 NUCLEAR SCIENCE & TECHNOLOGY

Radiation Measurements Pub Date : 2024-09-19 DOI:10.1016/j.radmeas.2024.107301

Divya Pandya , Nisha Oad , Sheetal Rawat , Brijesh Tripathi , Pavan Gurrala , Partha Sarathi Sarkar , Mohit Tyagi , Apoorva Bhatt

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引用次数: 0

摘要

利用增材制造技术，特别是数字光打印（DLP）技术来制造铯钛闪烁体薄膜，对于简化 X 射线成像应用闪烁体的生产具有相当大的潜力。本研究的重点是铯钛基复合塑料闪烁体薄膜的制造。在这项研究中，我们制作了直径为 1 英寸、直径为 0.1 毫米、厚度为 0.2 毫米的圆形薄膜，并在阿尔法和伽马射线辐射下进行了伽马光子计数测试。为了确定薄膜的阻挡功率范围，我们进行了基于蒙特卡罗的 GEANT4 模拟。此外，还对薄膜在 X 射线成像应用中的适用性进行了研究，结果显示薄膜（0.2 和 0.1 毫米）的空间分辨率在 100 和 130 μm 之间，对比度范围为 4.0-12.3 %，对比度为 1.26 lp/mm。观察到 0.2 毫米厚薄膜的空间分辨率和对比度下降，这是因为厚度增加加剧了散射现象，同时增强了 X 射线阻挡能力。这突出表明，与 0.2 毫米厚的薄膜相比，0.1 毫米厚的薄膜在最大限度提高空间分辨率和降低光产率之间的内在权衡意义重大。通过利用三维打印技术，这种方法为生产薄膜闪烁体提供了一种具有成本效益和时间效率的方法，与传统方法相比，它具有更高的灵活性和定制选项。

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3D printed microcrystalline CsI:Tl composite scintillating thin films for X-ray imaging

The utilization of additive manufacturing techniques, especially Digital Light Printing (DLP), in fabricating CsI:Tl scintillator films demonstrates considerable potential for streamlining the production of scintillators tailored for X-ray imaging applications. This research focuses on the fabrication of CsI:Tl-based composite plastic scintillator thin films. In this study, circular films measuring 1-inch in diameter and 0.1 mm & 0.2 mm in thickness are being produced and tested for gamma photon counts under alpha and gamma radiation. To establish the stopping power range of the films, a Monte Carlo based GEANT4 simulation has been carried out. Additionally, investigations into their suitability for X-ray imaging applications are being conducted, revealing the spatial resolution of the films (0.2 and 0.1 mm) between 100 and 130 μm and 1.26 lp/mm with a contrast range of 4.0–12.3 %. The observed decrease in spatial resolution and contrast for the 0.2 mm thick film is attributed to the thickness increase exacerbating the scattering phenomenon while simultaneously enhancing the X-ray stopping power. This highlights the significance of inherent trade-off between maximizing spatial resolution and compromising light yield of 0.1 mm films compared to the 0.2 mm thick film. By utilizing 3D printing, this approach offers a cost-effective and time-efficient method for producing thin-film scintillators with enhanced flexibility and customization options compared to conventional methods.

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来源期刊

Radiation Measurements 工程技术-核科学技术

CiteScore

4.10

自引率

20.00%

发文量

116

审稿时长

48 days

期刊介绍： The journal seeks to publish papers that present advances in the following areas: spontaneous and stimulated luminescence (including scintillating materials, thermoluminescence, and optically stimulated luminescence); electron spin resonance of natural and synthetic materials; the physics, design and performance of radiation measurements (including computational modelling such as electronic transport simulations); the novel basic aspects of radiation measurement in medical physics. Studies of energy-transfer phenomena, track physics and microdosimetry are also of interest to the journal. Applications relevant to the journal, particularly where they present novel detection techniques, novel analytical approaches or novel materials, include: personal dosimetry (including dosimetric quantities, active/electronic and passive monitoring techniques for photon, neutron and charged-particle exposures); environmental dosimetry (including methodological advances and predictive models related to radon, but generally excluding local survey results of radon where the main aim is to establish the radiation risk to populations); cosmic and high-energy radiation measurements (including dosimetry, space radiation effects, and single event upsets); dosimetry-based archaeological and Quaternary dating; dosimetry-based approaches to thermochronometry; accident and retrospective dosimetry (including activation detectors), and dosimetry and measurements related to medical applications.