基于保边扩散和平滑的双光谱有限角CT图像正则化。

IF 1.7 3区 医学 Q3 INSTRUMENTS & INSTRUMENTATION
Yanwei Qin, Ying Zhang, Xin Lu, Peng Zhang, Yunsong Zhao
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引用次数: 0

摘要

有限角度CT扫描是平面物体无损检测的一种有效方法,因此提出了各种方法。当被扫描物体包含高吸收材料,如金属时,现有的方法可能会由于X射线的束硬化而失败。为了克服这一问题,我们采用了双光谱有限角度CT扫描,并提出了相应的图像重建算法,该算法考虑了X射线的多色性,使基底材料图像没有束硬化伪影和金属伪影,从而有助于抑制有限角度伪影。仿真PCB数据和实际数据的实验结果表明了该算法的有效性。
本文章由计算机程序翻译,如有差异,请以英文原文为准。
Dual spectral limited-angle CT imaging regularized by edge-preserving diffusion and smoothing.
Limited-angle CT scan is an effective way for nondestructive inspection of planar objects, and various methods have been proposed accordingly. When the scanned object contains high-absorption material, such as metal, existing methods may fail due to the beam hardening of X-rays. In order to overcome this problem, we adopt a dual spectral limited-angle CT scan and propose a corresponding image reconstruction algorithm, which takes the polychromatic property of the X-ray into consideration, makes basis material images free of beam hardening artifacts and metal artifacts, and then helps depress the limited-angle artifacts. Experimental results on both simulated PCB data and real data demonstrate the effectiveness of the proposed algorithm.
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来源期刊
CiteScore
4.90
自引率
23.30%
发文量
150
审稿时长
3 months
期刊介绍: Research areas within the scope of the journal include: Interaction of x-rays with matter: x-ray phenomena, biological effects of radiation, radiation safety and optical constants X-ray sources: x-rays from synchrotrons, x-ray lasers, plasmas, and other sources, conventional or unconventional Optical elements: grazing incidence optics, multilayer mirrors, zone plates, gratings, other diffraction optics Optical instruments: interferometers, spectrometers, microscopes, telescopes, microprobes
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