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Related Concept Videos

Computed Tomography01:10

Computed Tomography

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.
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Imaging Studies III: Computed Tomography01:27

Imaging Studies III: Computed Tomography

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...
Divergence Theorem in 3D Space01:20

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Electron Microscope Tomography and Single-particle Reconstruction01:07

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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
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One-Compartment Open Model: Wagner-Nelson and Loo Riegelman Method for ka Estimation01:24

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This lesson introduces two critical methods in pharmacokinetics, the Wagner-Nelson and Loo-Riegelman methods, used for estimating the absorption rate constant (ka) for drugs administered via non-intravenous routes. The Wagner-Nelson method relates ka to the plasma concentration derived from the slope of a semilog percent unabsorbed time plot. However, it is limited to drugs with one-compartment kinetics and can be impacted by factors like gastrointestinal motility or enzymatic degradation.
On...
Maximizing the Directional Derivative01:25

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Using Tomoauto: A Protocol for High-throughput Automated Cryo-electron Tomography
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Published on: January 30, 2016

High Order Total Variation Minimization for Interior Tomography.

Jiansheng Yang1, Hengyong Yu, Ming Jiang

  • 1LMAM, School of Mathematical Sciences, Peking University, Beijing 100871, P.R. China.

Inverse Problems
|April 23, 2010
PubMed
Summary
This summary is machine-generated.

High-order total variation (HOT) minimization accurately reconstructs piecewise polynomial regions of interest from X-ray data. This method generalizes prior techniques for improved accuracy in tomographic reconstruction.

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Correlative Microscopy for 3D Structural Analysis of Dynamic Interactions
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Area of Science:

  • Medical Imaging
  • Computational Mathematics
  • Image Reconstruction

Background:

  • Existing interior problem solutions use total variation (TV) minimization for piecewise constant regions.
  • This approach has limitations when the region of interest (ROI) exhibits more complex structures.
  • Accurate reconstruction is crucial for various imaging applications.

Purpose of the Study:

  • To generalize TV minimization for piecewise polynomial regions of interest (ROIs).
  • To introduce and validate high-order total variation (HOT) minimization for enhanced ROI reconstruction.
  • To improve the accuracy of reconstructing complex ROIs from projection data.

Main Methods:

  • Introduction of high-order total variation (HOT) minimization.
  • Theoretical proof of accurate ROI reconstruction using HOT minimization for piecewise polynomial ROIs.
  • Verification of theoretical findings through numerical simulations.

Main Results:

  • Demonstrated that HOT minimization can accurately reconstruct piecewise polynomial ROIs.
  • Showcased the generalization capability of HOT beyond piecewise constant assumptions.
  • Numerical simulations confirmed the theoretical predictions for ROI reconstruction accuracy.

Conclusions:

  • High-order total variation (HOT) minimization offers a robust method for reconstructing piecewise polynomial regions in tomographic imaging.
  • This advancement extends the applicability of TV-based methods to more complex object structures.
  • The findings pave the way for more accurate image reconstruction in various scientific and medical fields.