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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...
X-ray Diffraction of Biological Samples01:10

X-ray Diffraction of Biological Samples

X-ray diffraction or XRD is an analytical tool that utilizes X-rays to study ordered structures such as crystalline organic and inorganic samples, polycrystalline materials, proteins, carbohydrates, and drugs.
According to Bragg's law, when X-rays strike the sample positioned on a stage, the rays are  scattered by the electron clouds around the sample atoms. The  X-ray diffraction or scattering is caused by constructive interference of the X-ray waves that reflect off the internal crystal...
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...
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...

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Related Experiment Video

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X-ray Visualization of Intraductal Ethanol-based Ablative Infusion for Prevention of Breast Cancer in Rabbit Models
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X-ray scattering for classifying tissue types associated with breast disease.

Sabeena Sidhua1, Karen K W Siu, Gregory Falzon

  • 1Monash Centre for Synchrotron Science, Monash University, Clayton, Victoria 3800, Australia. sabeena.sidhu@sci.monash.edu.au

Medical Physics
|November 4, 2008
PubMed
Summary

Small angle x-ray scattering (SAXS) reveals distinct collagen structures in breast tissues. This technique accurately differentiates invasive carcinoma from normal tissue, offering new diagnostic potential.

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Area of Science:

  • Biophysics
  • Materials Science
  • Medical Imaging

Background:

  • Collagen types I and III are crucial for breast tissue structure.
  • Previous studies noted differences in collagen structure between diseased and healthy breast tissues at the molecular level.
  • A large-scale analysis of collagen features using small angle x-ray scattering (SAXS) in breast tissue has been lacking.

Purpose of the Study:

  • To comprehensively analyze collagen structural parameters in breast tissues using SAXS.
  • To investigate the potential of SAXS-derived features for differentiating between invasive carcinoma, benign tissue, and normal parenchyma.
  • To assess SAXS's diagnostic capability compared to conventional histopathology.

Main Methods:

  • Small angle x-ray scattering (SAXS) was performed on 80 breast tissue samples (invasive carcinoma, benign, normal).
  • Analysis focused on molecular-level collagen structural parameters (axial, equatorial, polar, intensity, heterogeneity).
  • A classification model was developed using key SAXS parameters.

Main Results:

  • The amplitude of the third-order axial peak and total scattering intensity showed significant separation between tissue groups.
  • A classification model utilizing these two parameters achieved >95% accuracy in distinguishing invasive carcinoma from mammoplasty samples.
  • Differences were observed between normal tissue from disease-free patients and normal tissue from patients with disease.

Conclusions:

  • SAXS can effectively characterize collagen at the molecular level in breast tissue.
  • Specific SAXS parameters demonstrate high accuracy in classifying breast tissue types, including invasive carcinoma.
  • SAXS may offer complementary diagnostic information beyond traditional histopathology, potentially aiding in early disease detection.