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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

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...
Magnetic Resonance Imaging01:24

Magnetic Resonance Imaging

Magnetic resonance imaging (MRI) is a noninvasive medical imaging technique based on a phenomenon of nuclear physics discovered in the 1930s, in which matter exposed to magnetic fields and radio waves was found to emit radio signals. In 1970, a physician and researcher named Raymond Damadian noticed that malignant (cancerous) tissue gave off different signals than normal body tissue. He applied for a patent for the first MRI scanning device in clinical use by the early 1980s. The early MRI...
Positron Emission Tomography01:29

Positron Emission Tomography

Positron emission tomography (PET) is a medical imaging technique involving radiopharmaceuticals — substances that emit short-lived radiation. Although the first PET scanner was introduced in 1961, it took 15 more years before radiopharmaceuticals were combined with the technique and revolutionized its potential.
One of the main requirements of a PET scan is a positron-emitting radioisotope, which is produced in a cyclotron and then attached to a substance used by the part of the body being...
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 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...

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Related Experiment Video

Updated: May 10, 2026

Detection of Architectural Distortion in Prior Mammograms via Analysis of Oriented Patterns
13:44

Detection of Architectural Distortion in Prior Mammograms via Analysis of Oriented Patterns

Published on: August 30, 2013

Mammography: a contrary view.

J C Bailar

    Annals of Internal Medicine
    |January 1, 1976
    PubMed
    Summary
    This summary is machine-generated.

    Annual screening with mammography, physical exams, and history shows promise for reducing breast cancer mortality. However, mammography

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    Tracking the Mammary Architectural Features and Detecting Breast Cancer with Magnetic Resonance Diffusion Tensor Imaging
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    Published on: December 15, 2014

    Clinical Imaging of Microwave Mammography
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    Clinical Imaging of Microwave Mammography

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    Related Experiment Videos

    Last Updated: May 10, 2026

    Detection of Architectural Distortion in Prior Mammograms via Analysis of Oriented Patterns
    13:44

    Detection of Architectural Distortion in Prior Mammograms via Analysis of Oriented Patterns

    Published on: August 30, 2013

    Tracking the Mammary Architectural Features and Detecting Breast Cancer with Magnetic Resonance Diffusion Tensor Imaging
    15:48

    Tracking the Mammary Architectural Features and Detecting Breast Cancer with Magnetic Resonance Diffusion Tensor Imaging

    Published on: December 15, 2014

    Clinical Imaging of Microwave Mammography
    05:28

    Clinical Imaging of Microwave Mammography

    Published on: November 14, 2025

    Area of Science:

    • Oncology
    • Radiology
    • Public Health

    Background:

    • Mammography is a widely used screening tool for breast cancer detection.
    • Population-wide screening aims to reduce breast cancer mortality rates.
    • The effectiveness and risks of mammography screening require ongoing evaluation.

    Purpose of the Study:

    • To review experimental and clinical data on mammography for population screening.
    • To assess the evidence for mammography's role in reducing breast cancer mortality.
    • To evaluate the known benefits and potential harms of mammography screening.

    Main Methods:

    • Review of existing experimental and clinical studies on mammography.
    • Analysis of data regarding breast cancer mortality reduction.
    • Assessment of evidence for mammography's independent contribution.
    • Evaluation of long-term effects and radiation hazards.

    Main Results:

    • Combined screening (history, physical exam, mammography) shows good evidence for reducing short- to mid-term breast cancer mortality by approximately one-third.
    • Evidence for mammography's significant solo contribution to mortality reduction is weak and indirect.
    • Data on long-term effects and satisfactory investigations of radiation hazards are lacking.
    • The clinical literature emphasizes mammography benefits over its defects.

    Conclusions:

    • Promoting mammography as a general public health measure is currently premature.
    • Further research is needed on long-term outcomes and radiation risks.
    • The role of mammography alone in mortality reduction requires more robust evidence.