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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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Imaging Studies III: Computed Tomography01:27

Imaging Studies III: Computed Tomography

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DefinitionComputed Tomography (CT) of the genitourinary (GU) tract is a non-invasive imaging modality that utilizes X-rays and computer processing to generate detailed cross-sectional images of the urinary system, encompassing the kidneys, ureters, bladder, and adjacent structures such as the adrenal glands.PurposeCT scans of the GU tract serve several diagnostic and therapeutic purposes, including:Diagnosis of Urinary Tract Diseases: Detects kidney stones, tumors, cysts, and congenital...
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Resistivity01:22

Resistivity

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When a voltage is applied to a conductor, an electrical field is generated, and charges in the conductor feel the force due to the electrical field. The current density that results depends on the electrical field and the properties of the material. In some materials, including metals at a given temperature, the current density is approximately proportional to the electrical field. In these cases, the current density can be modeled as:
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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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Updated: Sep 10, 2025

Pore-scale Imaging and Characterization of Hydrocarbon Reservoir Rock Wettability at Subsurface Conditions Using X-ray Microtomography
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グレーレベル同時発生マトリックスによる電気抵抗性トモグラフィの解釈の改善

John McKnight1, Heather Bedle1, Sina Saneiyan2,3

  • 1School of Geosciences, The University of Oklahoma, Norman, OK, USA.

Scientific reports
|August 22, 2025
PubMed
まとめ

この研究は,グレーレベル共発生マトリックス (GLCM) の質感特性を用いて電気抵抗性トモグラフィ (ERT) の解釈を強化しています. GLCMは,複雑な地質環境における地下粘土の境界線と地下水の領域の描写を改善します.

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Visualization of Failure and the Associated Grain-Scale Mechanical Behavior of Granular Soils under Shear using Synchrotron X-Ray Micro-Tomography
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Determination of Aggregate Surface Morphology at the Interfacial Transition Zone ITZ
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Determination of Aggregate Surface Morphology at the Interfacial Transition Zone ITZ

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Pore-scale Imaging and Characterization of Hydrocarbon Reservoir Rock Wettability at Subsurface Conditions Using X-ray Microtomography
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Pore-scale Imaging and Characterization of Hydrocarbon Reservoir Rock Wettability at Subsurface Conditions Using X-ray Microtomography

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Visualization of Failure and the Associated Grain-Scale Mechanical Behavior of Granular Soils under Shear using Synchrotron X-Ray Micro-Tomography
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Visualization of Failure and the Associated Grain-Scale Mechanical Behavior of Granular Soils under Shear using Synchrotron X-Ray Micro-Tomography

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Determination of Aggregate Surface Morphology at the Interfacial Transition Zone ITZ
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Determination of Aggregate Surface Morphology at the Interfacial Transition Zone ITZ

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科学分野:

  • 地理学
  • 水土学
  • 画像分析

背景:

  • 電気抵抗性トモグラフィー (ERT) は地下画像に不可欠ですが,逆転による滑らかな境界が原因で解釈はしばしば曖昧です.
  • 地下水の探査には粘土の境界線を定めることが不可欠ですが,異質な環境では従来のERT方法が困難です.

研究 の 目的:

  • ERTの解釈を改善するために,グレーレベル同時発生マトリックス (GLCM) のテクスチャ属性を適用する.
  • 地下水資源の評価のために,地表の特徴付けの正確さを向上させる.

主な方法:

  • 100 × 100 mの3D ERT調査の分析
  • GLCMの3つのテクスチャ属性の適用: 平均,変数,エントロピー
  • GLCMの属性を従来のERTの逆転と統合する.

主要な成果:

  • GLCM 逆転の平滑を減らし,粘土の境界とレンズの形態の定義を改善する.
  • GLCM Varianceは,以前から曖昧な表面に届く充電ゾーンを特定しました.
  • GLCM エントロピーは,粘土単位と地下水貯水池の間のコントラストを高め,水層と制限層の差別を助長しました.

結論:

  • GLCMの質感分析は,異質な堆積物の環境における ERTの解釈を大幅に改善します.
  • このワークフローは,よりよい地表の特徴化のために,電気抵抗データから貴重な追加の構造情報を提供します.
  • この方法は地下水資源の評価と管理に 大きな可能性を秘めている.