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Related Concept Videos

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...
Computed Tomography01:10

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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.
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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.
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Radiological Investigation I: X-ray and CT01:30

Radiological Investigation I: X-ray and CT

Radiological investigations, including X-rays and computed tomography (CT) scans, are critical for diagnosing and evaluating various medical conditions. These imaging techniques provide valuable insights into the body's internal structures, aiding in the detection of abnormalities, assessment of disease progression, and development of treatment strategies. This article delves into two primary radiological investigations, chest X-rays and CT scans, outlining their purpose, procedures, and the...

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Agarose-based Tissue Mimicking Optical Phantoms for Diffuse Reflectance Spectroscopy
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Dedicated phantom materials for spectral radiography and CT.

Polad M Shikhaliev1

  • 1Imaging Physics Laboratory, Department of Physics and Astronomy, Louisiana State University, Baton Rouge, LA 70803, USA. pshikhal@lsu.edu

Physics in Medicine and Biology
|March 9, 2012
PubMed
Summary

New spectral phantom materials accurately mimic tissue properties for advanced X-ray imaging. These materials are compatible with contrast agents and cost-effective to produce, aiding spectral radiography and computed tomography (CT) development.

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Area of Science:

  • Medical Physics
  • Materials Science
  • Radiological Imaging

Background:

  • Conventional X-ray imaging is advancing to spectral radiography and computed tomography (CT).
  • Existing phantom materials are inadequate for spectral imaging due to incompatibility with contrast agents and inaccurate tissue representation.
  • There is a need for dedicated spectral phantom materials that accurately represent energy-dependent tissue properties.

Purpose of the Study:

  • To develop a theoretical framework and practical method for creating tissue-equivalent spectral phantom materials.
  • To fabricate and characterize these new spectral phantom materials.
  • To evaluate the materials' compatibility with common contrast agents.

Main Methods:

  • Development of a theoretical framework for spectral phantom material design.
  • Fabrication of spectral phantom material samples using readily available components.
  • Characterization using CT imaging and X-ray transmission experiments.
  • Evaluation of material compatibility with iodine, gold, and calcium contrast agents.

Main Results:

  • Fabricated materials demonstrated densities, mass attenuation coefficients, effective atomic numbers, and electron densities comparable to ICRU-44 tissue data.
  • The materials exhibited good volume and inter-sample uniformity.
  • Successful integration and evaluation with iodine, gold, and calcium contrast agents were achieved.
  • Materials were produced cost-effectively under laboratory conditions.

Conclusions:

  • The developed theoretical framework and fabrication method provide a viable approach for creating dedicated spectral phantom materials.
  • These materials are suitable for spectral radiography and CT applications, offering accurate tissue representation and contrast agent compatibility.
  • The findings could also benefit other fields, such as radiation therapy.