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相关概念视频

Computed Tomography01:10

Computed Tomography

6.2K
Tomography refers to imaging by sections. Computed tomography (CT) is a non-invasive imaging technique that uses computers to analyze several cross-sectional X-rays to reveal minute details about structures in the body.
The technique was invented in the 1970s and is based on the principle that as X-rays pass through the body, they are absorbed or reflected at different levels. In the technique, a patient lies on a motorized platform while a computerized axial tomography (CAT) scanner rotates...
6.2K

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相关实验视频

Updated: Sep 11, 2025

Human Brown Adipose Tissue Depots Automatically Segmented by Positron Emission Tomography/Computed Tomography and Registered Magnetic Resonance Images
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Human Brown Adipose Tissue Depots Automatically Segmented by Positron Emission Tomography/Computed Tomography and Registered Magnetic Resonance Images

Published on: February 18, 2015

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基于TS-FBP的截断投影CL重建

Junyao Wang, Yongning Zou, Qian Qin

    Optics express
    |August 13, 2025
    PubMed
    概括

    这项研究引入了一种两步加权过反射算法,用于从截断的X射线计算层图数据中重建图像. 该方法有效地减少了薄板零件分析中的工件,提高了非破坏性测试质量.

    科学领域:

    • 材料科学 材料科学 材料科学
    • 非破坏性测试 不破坏性测试
    • 图像重建 图像的重建

    背景情况:

    • 在层状结构薄板件 (LSTP) 中检测微缺陷时,X射线计算层状图 (CL) 是至关重要的.
    • 薄板组件在CL系统中经常超过视野 (FOV),导致截断工件.
    • 当前用于局部计算机断层扫描 (CT) 的重建算法尚未完全探索与截断预测的CL.

    研究的目的:

    • 开发一种新的算法,用于从截断的投影中重建CL图像.
    • 为应对由超过CL系统FOV的组件引起的图像工件的挑战.
    • 提高薄板零件的非破坏性测试质量.

    主要方法:

    • 提出了一个两步加权过反向投射 (TS-FBP) 算法.
    • 该方法将FBP与共相加权投影方案集成在一起,以实现平滑的截断.
    • 过后的二次加权机制用于图像强度的正常化.

    主要成果:

    • TS-FBP算法有效地抑制了CL横截面重建中的工件.
    • 拟议的方法实现了高计算效率.
    • 通过模拟和实验的验证证实了文物减少和保持重建质量.

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    Last Updated: Sep 11, 2025

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    Computed Tomography-guided Time-domain Diffuse Fluorescence Tomography in Small Animals for Localization of Cancer Biomarkers
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    Born Normalization for Fluorescence Optical Projection Tomography for Whole Heart Imaging

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    结论:

    • 该TS-FBP算法为CL重建提供了一个可行的解决方案,用截断的投影来重建CL.
    • 这种技术增强了薄板组件的非破坏性测试能力.
    • 这种方法提供了高效的,高质量的文物抑制的重建.