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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...
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...
X-ray Imaging01:24

X-ray Imaging

German physicist Wilhelm Röntgen (1845–1923) was experimenting with electrical current when he discovered that a mysterious and invisible "ray" would pass through his flesh but leave an outline of his bones on a screen coated with a metal compound. In 1895, Röntgen made the first durable record of the internal parts of a living human: an "X-ray" image (as it came to be called) of his wife’s hand. Scientists worldwide quickly began their own experiments with X-rays, and by 1900, X-ray was widely...
Imaging Studies II: Positron Emission Tomography and Scintigraphy01:25

Imaging Studies II: Positron Emission Tomography and Scintigraphy

Positron Emission Tomography (PET) is a medical imaging technique that provides crucial insights into the body's physiological functions at a molecular level. It is an indispensable resource for diagnosing, staging, and monitoring various illnesses, notably cancer, neurological disorders, and cardiovascular conditions.
Fundamental Principles of PET
Imaging Studies for Cardiovascular System III: X-Ray01:20

Imaging Studies for Cardiovascular System III: X-Ray

The most common cardiovascular diagnostic test is an X-ray. It produces images of the heart, blood vessels, and adjacent structures.
Definition and Purpose
An X-ray, or radiograph, is a non-invasive method that uses ionizing radiation to take images of internal structures. It is mainly used in cardiac imaging to examine the heart, lungs, and major blood vessels, aiming to identify abnormalities in the heart's size, shape, and position, such as heart failure, congenital defects, and vascular...
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...

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Related Experiment Video

Updated: May 14, 2026

Image Rendering Techniques in Postmortem Computed Tomography: Evaluation of Biological Health and Profile in Stranded Cetaceans
12:32

Image Rendering Techniques in Postmortem Computed Tomography: Evaluation of Biological Health and Profile in Stranded Cetaceans

Published on: September 27, 2020

T-ray Imaging and Tomography.

S Wang1, B Ferguson, D Abbott

  • 1Center for Subsurface Sensing and Imaging Systems, Rensselaer Polytechnic Institute, Troy, NY 12180-3590 USA.

Journal of Biological Physics
|January 25, 2013
PubMed
Summary
This summary is machine-generated.

Terahertz (T-ray) imaging reconstructs 3D targets using broadband pulses and Fresnel lenses. T-ray spectroscopy enables classification of biological samples by analyzing their far-infrared spectral response.

Keywords:
ImagingT-raystomography

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High Resolution 3D Imaging of Ex-Vivo Biological Samples by Micro CT
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High Resolution 3D Imaging of Ex-Vivo Biological Samples by Micro CT

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Area of Science:

  • Optics and Photonics
  • Spectroscopy
  • Imaging Science

Background:

  • Terahertz (T-ray) imaging offers unique capabilities for non-destructive analysis.
  • The frequency-dependent nature of optical components like Fresnel lenses is crucial for advanced imaging.
  • Far-infrared spectral information provides valuable insights into material properties.

Purpose of the Study:

  • To demonstrate algorithms for reconstructing target structures from diffracted T-ray pulses.
  • To show 3D target reconstruction using broadband pulses and a frequency-dependent Fresnel lens.
  • To highlight the utility of spectral information in T-ray imaging for sample classification.

Main Methods:

  • Development and application of two structure reconstruction algorithms for T-ray data.
  • Utilizing broadband pulses and a Fresnel lens with frequency-dependent focal length for 3D imaging.
  • Implementing a simple classification algorithm on 2D T-ray spectroscopic images of biological samples.

Main Results:

  • Successful reconstruction of target structures from diffracted pulses.
  • Demonstration of 3D target reconstruction capabilities.
  • Effective classification of different biological samples using T-ray spectroscopic imaging.

Conclusions:

  • T-ray imaging, combined with spectral analysis, is a powerful tool for structural reconstruction and material classification.
  • The frequency-dependent properties of optical elements can be leveraged for enhanced 3D imaging.
  • T-ray spectroscopy provides essential information for differentiating biological tissues.