Algebraic Reconstruction Method Physical Model Ultrasonic Image Reconstruction
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摘要: 用“DC4型超声波检测仪”检测未知纵波速度分布的嵌有石膏的铝板，沿每条射线采集透射直达波“到时”数据。用特殊的布置方法布置射线，使每条射线积分步长均为已知常数，并沿其做Radon变换（线积分），从而建立此“铝板模型”纵波速度分布线性代数方程组。编制ART加法修正方法R语言程序处理“到时”数据，重建“铝板模型”纵波速度分布，并提出识别石膏洞的充分必要条件、检验条件和“视察法”，通过重建结果识别出“铝板模型”上“石膏洞”的位置。此外，按照对“铝板模型”的相同的处理方式对“三板平面模型”进行实验及分析。本文重建图像的结果对于了解CT成像方法具有参考价值，有助于CT成像技术的推广应用。Abstract: Use the "DC4 Ultrasonic Detector" to detect the aluminum plate embedded with gypsum, with an unknown distribution of the velocity of the longitudinal wave, and collect "arrival time" data along each ray. Radon transform (line integral) is done on rays along the unknown digital image, with the same ray arrangement each ray's integral step is constant, thus easy to set up a linear algebraic equations of the unknown digital image. Use "Algebraic Reconstruction Technique" addition modified iteration to compile R program, with this program to handle the "arrival time vector" data and reconstruct the unknown digital image. The necessary and sufficient conditions, the test conditions and the inspection method for identifying the gypsum hole are proposed to identify the location of the gypsum hole on the aluminum plate mode based on the reconstructed digital image. In addition, the "Three-plate plane model" was tested and analyzed according to the same treatment method for the aluminum plate mode. The results of image reconstruction in this paper have reference value for understanding CT imaging methods and contribute to the popularization and application of CT imaging technology.
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期刊类型引用(2)
1. 喻波. 拟三维跨孔地震波CT技术在桥梁桩基础岩溶勘察中的应用. 工程地球物理学报. 2023(04): 491-499 . 
百度学术
2. 黄伟. 基于数字图像重建的三维影像视觉传达优化系统设计. 现代电子技术. 2021(04): 164-167 . 百度学术
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