一种新型的高灵敏度紧凑型激光OSL读取器-在医疗剂量学中的应用

IF 1.4 3区物理与天体物理 Q3 INSTRUMENTS & INSTRUMENTATION

Nuclear Instruments & Methods in Physics Research Section B-beam Interactions With Materials and Atoms Pub Date : 2025-08-20 DOI:10.1016/j.nimb.2025.165836

Anuj Soni , R.N. Khanderao , N. Kakade , D.R. Mishra , S.D. Sharma , B.K. Sapra

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引用次数: 0

摘要

研制了一种高灵敏度紧凑型激光光激发发光（OSL）读卡器。该系统由紧凑的（火柴盒大小）激光器组成，波长分别为473 nm和532 nm，每个激光器的光功率为350 mW。该系统的暗计数为30-40 cps，与基于LED（发光二极管）的商用Riso读取器相当。利用LiCaAlF6:Eu，Y剂量计（3 mm直径）在450nm刺激下获得的最小检测剂量为147 μGy，而Riso读取器获得的最小检测剂量为260 μGy。所开发系统的灵敏度是商用Riso阅读器的近2倍。该仪器可用于放射治疗质量审计中光致发光荧光粉的研究和剂量验证。讨论了所开发的读卡器系统的设计和剂量学特性，以及它在医学剂量学中的可能应用。

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A new highly sensitive compact laser based OSL reader − application in medical dosimetry

A highly sensitive compact laser based Optically Stimulated Luminescence (OSL) reader has been developed. The system consists of compact (matchbox size) lasers of 473 and 532 nm wavelength respectively having optical power 350 mW each. The dark counts of the system were found to be 30–40 cps, which is on par with LED (Light Emitting Diode) based commercial Riso reader. The minimum detectable dose of the developed system was found to be 147 μGy using LiCaAlF₆:Eu,Y dosimeter (3 mm dia) under 450 nm stimulation for one sec data acquisition as compared to 260 μGy with Riso reader. The sensitivity of the developed system was found to be nearly 2 times to that of the commercial Riso reader. The instrument will be useful for OSL phosphor research and dose verification in quality audit of radiotherapy. The design aspects of the developed reader system and the dosimetric characterization are discussed with its possible application in medical dosimetry.

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来源期刊

Nuclear Instruments & Methods in Physics Research Section B-beam Interactions With Materials and Atoms 物理-核科学技术

CiteScore

2.80

自引率

7.70%

发文量

231

审稿时长

1.9 months

期刊介绍： Section B of Nuclear Instruments and Methods in Physics Research covers all aspects of the interaction of energetic beams with atoms, molecules and aggregate forms of matter. This includes ion beam analysis and ion beam modification of materials as well as basic data of importance for these studies. Topics of general interest include: atomic collisions in solids, particle channelling, all aspects of collision cascades, the modification of materials by energetic beams, ion implantation, irradiation - induced changes in materials, the physics and chemistry of beam interactions and the analysis of materials by all forms of energetic radiation. Modification by ion, laser and electron beams for the study of electronic materials, metals, ceramics, insulators, polymers and other important and new materials systems are included. Related studies, such as the application of ion beam analysis to biological, archaeological and geological samples as well as applications to solve problems in planetary science are also welcome. Energetic beams of interest include atomic and molecular ions, neutrons, positrons and muons, plasmas directed at surfaces, electron and photon beams, including laser treated surfaces and studies of solids by photon radiation from rotating anodes, synchrotrons, etc. In addition, the interaction between various forms of radiation and radiation-induced deposition processes are relevant.