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Related Concept Videos

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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Physical Principles Governing Gas Exchange01:16

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Gas behavior plays a vital role in understanding bodily processes such as external and internal respiration. External respiration involves the diffusion of oxygen into the blood and carbon dioxide out of it in the lungs. In contrast, internal respiration happens in body tissues, where these gases move in opposite directions.
Gas Laws Governing Respiration
The behavior of gases is guided by Dalton's Law of partial pressures and Henry's Law.
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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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The Uncertainty Principle04:08

The Uncertainty Principle

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Werner Heisenberg considered the limits of how accurately one can measure properties of an electron or other microscopic particles. He determined that there is a fundamental limit to how accurately one can measure both a particle’s position and its momentum simultaneously. The more accurate the measurement of the momentum of a particle is known, the less accurate the position at that time is known and vice versa. This is what is now called the Heisenberg uncertainty principle. He...
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Hardy-Weinberg Principle01:49

Hardy-Weinberg Principle

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Diploid organisms have two alleles of each gene, one from each parent, in their somatic cells. Therefore, each individual contributes two alleles to the gene pool of the population. The gene pool of a population is the sum of every allele of all genes within that population and has some degree of variation. Genetic variation is typically expressed as a relative frequency, which is the percentage of the total population that has a given allele, genotype or phenotype.
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The Pauli Exclusion Principle03:06

The Pauli Exclusion Principle

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The arrangement of electrons in the orbitals of an atom is called its electron configuration. We describe an electron configuration with a symbol that contains three pieces of information:
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Updated: Jan 25, 2026

3D Imaging of Soft-Tissue Samples using an X-ray Specific Staining Method and Nanoscopic Computed Tomography
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Computed Tomography: Physical Principles and Recent Technical Advances.

Euclid Seeram1

  • 1British Columbia Institute of Technology, Burnaby, Canada.

Journal of Medical Imaging and Radiation Sciences
|May 5, 2019
PubMed
Summary
This summary is machine-generated.

Computed Tomography (CT) utilizes radiation attenuation principles for imaging. Advances in CT technology, including multislice CT (MSCT), enhance imaging capabilities for various medical applications.

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Area of Science:

  • Medical Imaging
  • Radiology
  • Physics

Background:

  • Computed Tomography (CT) has revolutionized medical diagnostics.
  • The development of the first clinically useful CT scanner was a Nobel Prize-winning achievement.
  • Understanding CT's physical principles is crucial for its application.

Purpose of the Study:

  • To describe the physical principles and instrumentation of Computed Tomography (CT).
  • To outline recent advances in CT technology, including spiral/helical and multislice CT (MSCT).
  • To review the applications of CT in various medical fields.

Main Methods:

  • Explanation of radiation attenuation and Lambert-Beer's Law.
  • Description of CT system components and data acquisition evolution.
  • Review of image reconstruction and postprocessing techniques, including 3D imaging.

Main Results:

  • Detailed explanation of spiral/helical CT principles and technology.
  • Discussion of multislice CT (MSCT) detector and slip-ring technology.
  • Outlined advantages and applications of MSCT, including cardiac imaging.

Conclusions:

  • CT technology has evolved significantly from its early development.
  • Advances like MSCT offer enhanced imaging capabilities and applications.
  • CT plays a vital role in radiation therapy and nuclear medicine.