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相关概念视频

Computed Tomography01:10

Computed Tomography

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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...
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Electron Microscope Tomography and Single-particle Reconstruction01:07

Electron Microscope Tomography and Single-particle Reconstruction

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Transmission electron microscopy (TEM) can be used to determine the 3D structure of biological samples with the help of techniques such as electron microscope tomography and single-particle reconstruction. While single-particle reconstruction can examine macromolecules and macromolecular complexes in vitro conditions only, tomography permits the study of cell components or small cells in vivo.
Electron Tomography
Electron tomography can be performed either in TEM or STEM (scanning transmission...
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相关实验视频

Updated: Jun 22, 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

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在光子计数计算机断层学中,基于图像的多材料分解的基于先前知识的免费方法.

Jonas Neumann1,2, Tristan Nowak2, Bernhard Schmidt2

  • 1Quantum Optics and Quantum Information Group (QOQI), Friedrich-Alexander-Universität Erlangen-Nürnberg, Staudtstr. 1, 91058 Erlangen, Germany.

Diagnostics (Basel, Switzerland)
|June 27, 2024
PubMed
概括
此摘要是机器生成的。

本研究提出了一种使用光子计数CT进行材料分解的新方法,通过单次扫描精确量化,和水度. 该方法实现了较低的估计误差,提高了医学成像诊断能力.

关键词:
计算机断层扫描 (CT) 是一种计算机断层扫描.在k-edge成像系统中使用.多种材料的分解分解.在光子计数CT中,光子计数探测器的探测器频谱光谱图谱 (CT) 是指光谱的光谱.

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Three-Dimensional Particle Shape Analysis Using X-ray Computed Tomography: Experimental Procedure and Analysis Algorithms for Metal Powders
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科学领域:

  • 医疗成像医学成像
  • 放射学 放射学是一门学科.
  • 材料科学 材料科学 材料科学

背景情况:

  • 光子计数CT (PCCT) 可用于材料分解的多光谱数据采集.
  • 精确的材料量化对于先进的CT应用至关重要.

研究的目的:

  • 开发和评估一个没有先前知识的确定性材料分解算法,用于PCCT.
  • 从单个扫描中量化三种材料 (,,水) 的度.

主要方法:

  • 在商业PCCT系统上实施了确定性材料分解方法.
  • 校准和测试使用幻影测量进行.
  • 使用通用最小平方估计与基于多项式的CT数量预测.

主要成果:

  • 该算法准确地将光谱图像分解成,和水图.
  • 对比剂的平均估计误差为4%,水为1%.
  • 和图中的对比度和噪声比分别为36%和16%.

结论:

  • 开发的算法允许使用单扫描PCCT数据进行准确的,没有先前知识的材料分解.
  • 这种方法提高了医疗应用中的多材料成像的定量准确性.