暗场显微术
X射线
散射
吸收(声学)
光学
单发
材料科学
分析化学(期刊)
化学
物理
显微镜
色谱法
作者
Hyunwoo Lim,Jong-Hyeok Lee,Soohyun Lee,Hyosung Cho,Hunwoo Lee,Duhee Jeon
标识
DOI:10.1016/j.jfoodeng.2022.111189
摘要
This study presents a novel approach for detecting low-density foreign bodies (FBs) in food products using single-shot grid-based dark-field X-ray imaging (SG-DFXI). SG-DFXI obtains information related to the sample's small-angle X-ray scattering using a conventional X-ray source and grid. It is specifically utilized to detect low-density materials that are invisible when using conventional techniques. To demonstrate its efficacy, an experiment was conducted with food samples containing low-density FBs such as wood, Styrofoam, pencil lead, and soft plastic. A quantitative evaluation was conducted based on the contrast-to-noise ratio (CNR) and relative contrast gain (RCG). The proposed method detected low-density FBs barely visible in absorption images. Additionally, the CNR values measured in dark-field images were approximately 2.8–10.5 times larger than those in the absorption images, indicating that the proposed approach significantly improved the ability to detect low-density FBs in food samples. The RCG characteristic was improved as the system's autocorrelation length (ξG) increased; the RCG value for ξG = 453 nm was approximately 2.5 times larger than that for ξG = 171 nm.
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