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

Electron Microscope Tomography and Single-particle Reconstruction

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...
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...
Continuous -time Fourier Transform01:11

Continuous -time Fourier Transform

The Fourier series is instrumental in representing periodic functions, offering a powerful method to decompose such functions into a sum of sinusoids. This technique, however, necessitates modification when applied to nonperiodic functions. Consider a pulse-train waveform consisting of a series of rectangular pulses. When these pulses have a finite period, they can be accurately represented by a Fourier series. Yet, as the period approaches infinity, resulting in a single, isolated pulse, the...
Imaging Studies I: CT and MRI01:14

Imaging Studies I: CT and MRI

Introduction: MRI and CT scans are crucial advancements in medical imaging techniques, playing a vital role in diagnosing conditions related to the gastrointestinal (GI) system. Each scan serves distinct purposes, targets specific areas, and requires unique nursing duties.
Description of the Procedures
Computed Tomography (CT) scan:
Computed Tomography (CT) scans use X-ray technology to generate detailed images of bones, organs, and tissues. During the scan, the patient lies on a moving table...
Aliasing01:18

Aliasing

Accurate signal sampling and reconstruction are crucial in various signal-processing applications. A time-domain signal's spectrum can be revealed using its Fourier transform. When this signal is sampled at a specific frequency, it results in multiple scaled replicas of the original spectrum in the frequency domain. The spacing of these replicas is determined by the sampling frequency.
If the sampling frequency is below the Nyquist rate, these replicas overlap, preventing the original signal...

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Related Experiment Video

Updated: May 12, 2026

Simultaneous Brightfield, Fluorescence, and Optical Coherence Tomographic Imaging of Contracting Cardiac Trabeculae Ex Vivo
12:54

Simultaneous Brightfield, Fluorescence, and Optical Coherence Tomographic Imaging of Contracting Cardiac Trabeculae Ex Vivo

Published on: October 2, 2021

Tomographic imaging via spectral encoding of spatial frequency.

Shikhar Uttam1, Sergey A Alexandrov, Rajan K Bista

  • 1Biomedical and Optical Imaging Laboratory (BOIL), Departments of Medicine and Bioengineering, University of Pittsburgh, Pittsburgh PA 15213, USA. shf28@pitt.edu

Optics Express
|April 3, 2013
PubMed
Summary

Spectral tomographic imaging (STI) visualizes 3D objects with sub-micron resolution. This advanced technique offers nanoscale accuracy for quantitative structural characterization within any object volume.

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High-plex Imaging using Spectral Confocal Microscopy to Minimize Non-specific Tissue Fluorescence
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High-plex Imaging using Spectral Confocal Microscopy to Minimize Non-specific Tissue Fluorescence

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Related Experiment Videos

Last Updated: May 12, 2026

Simultaneous Brightfield, Fluorescence, and Optical Coherence Tomographic Imaging of Contracting Cardiac Trabeculae Ex Vivo
12:54

Simultaneous Brightfield, Fluorescence, and Optical Coherence Tomographic Imaging of Contracting Cardiac Trabeculae Ex Vivo

Published on: October 2, 2021

High-plex Imaging using Spectral Confocal Microscopy to Minimize Non-specific Tissue Fluorescence
10:28

High-plex Imaging using Spectral Confocal Microscopy to Minimize Non-specific Tissue Fluorescence

Published on: October 28, 2025

Area of Science:

  • Biomedical imaging
  • Optical physics
  • Nanotechnology

Background:

  • Three-dimensional optical tomographic imaging is crucial for biomedical research and clinical applications.
  • Existing methods face limitations in resolution and quantitative characterization.

Purpose of the Study:

  • To introduce Spectral Tomographic Imaging (STI) for advanced 3D visualization.
  • To demonstrate STI's capability for nanoscale quantitative structural characterization.

Main Methods:

  • Utilizing the principle of spectral encoding of spatial frequency.
  • Developing theoretical framework for STI.
  • Performing proof-of-concept numerical simulations.

Main Results:

  • STI enables visualization of 3D objects at sub-micron resolution.
  • STI provides spatially-resolved quantitative characterization with nanoscale accuracy.
  • Numerical simulations confirm the feasibility of STI.

Conclusions:

  • Spectral Tomographic Imaging is a feasible technique for high-resolution 3D imaging.
  • STI offers significant advancements in quantitative structural analysis for biomedical applications.