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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...
Determination of Crystal Structures01:29

Determination of Crystal Structures

In the late 1800s, the revelation that light extended beyond visible wavelengths led to the discovery of X-rays by Wilhelm Roentgen. Recognized as high-energy electromagnetic radiation with short wavelengths, X-rays prompted exploration into their interaction with crystals. Max von Laue proposed in 1912 that the periodic arrangement of atoms, ions, or molecules in crystals would cause them to diffract X-rays, a hypothesis confirmed through experiments with copper sulfate and zinc sulfide...
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...
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...
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...
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: Jun 15, 2026

High Spatial Resolution Chemical Imaging of Implant-Associated Infections with X-ray Excited Luminescence Chemical Imaging Through Tissue
07:48

High Spatial Resolution Chemical Imaging of Implant-Associated Infections with X-ray Excited Luminescence Chemical Imaging Through Tissue

Published on: September 30, 2022

Detectors for the future of X-ray imaging.

M Aslund1, E Fredenberg, M Telman

  • 1Sectra Mamea AB, Smidesvägen 2, 171 41 Solna, Sweden. magnus.aslund@sectra.se

Radiation Protection Dosimetry
|March 9, 2010
PubMed
Summary

Photon-counting detectors enhance X-ray imaging by reducing noise and improving dose efficiency. This review covers their application in medical imaging, focusing on scatter control and spectral imaging advancements.

Area of Science:

  • Medical physics
  • Radiological imaging technology

Background:

  • X-ray imaging dose efficiency has improved with new detectors, but scattered radiation remains a significant noise source.
  • Current anti-scatter grids are inefficient, highlighting the need for improved scatter rejection in future X-ray imaging developments.

Purpose of the Study:

  • To review state-of-the-art photon-counting detectors (PCDs) and scatter control methods.
  • To discuss the application of PCDs in diagnostic X-ray medical imaging, including spectral imaging.
  • To explore challenges like charge sharing and high rates in PCDs and mitigation strategies.

Main Methods:

  • Review of current literature and technological advancements in X-ray detector technology.
  • Analysis of photon-counting detector principles and their advantages over conventional detectors.

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Applying X-ray Imaging Crystal Spectroscopy for Use as a High Temperature Plasma Diagnostic
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Applying X-ray Imaging Crystal Spectroscopy for Use as a High Temperature Plasma Diagnostic

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Visualization of Low-Level Gamma Radiation Sources Using a Low-Cost, High-Sensitivity, Omnidirectional Compton Camera
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Visualization of Low-Level Gamma Radiation Sources Using a Low-Cost, High-Sensitivity, Omnidirectional Compton Camera

Published on: January 30, 2020

Related Experiment Videos

Last Updated: Jun 15, 2026

High Spatial Resolution Chemical Imaging of Implant-Associated Infections with X-ray Excited Luminescence Chemical Imaging Through Tissue
07:48

High Spatial Resolution Chemical Imaging of Implant-Associated Infections with X-ray Excited Luminescence Chemical Imaging Through Tissue

Published on: September 30, 2022

Applying X-ray Imaging Crystal Spectroscopy for Use as a High Temperature Plasma Diagnostic
06:46

Applying X-ray Imaging Crystal Spectroscopy for Use as a High Temperature Plasma Diagnostic

Published on: August 25, 2016

Visualization of Low-Level Gamma Radiation Sources Using a Low-Cost, High-Sensitivity, Omnidirectional Compton Camera
06:28

Visualization of Low-Level Gamma Radiation Sources Using a Low-Cost, High-Sensitivity, Omnidirectional Compton Camera

Published on: January 30, 2020

  • Discussion of scatter reduction techniques and their integration with advanced detectors.

    • Main Results:

    • Photon-counting detectors eliminate electronic noise, benefiting low-dose imaging applications.
    • Energy-sensitive PCDs enable signal-to-noise ratio optimization, background subtraction, and quantitative analysis.
    • Spectral imaging with PCDs offers advanced diagnostic capabilities, though challenges like charge sharing exist.

    Conclusions:

    • Photon-counting detectors represent a significant advancement in X-ray imaging, offering improved performance and new diagnostic possibilities.
    • Effective scatter control remains crucial for maximizing the benefits of advanced detectors in medical imaging.
    • Further research into mitigating challenges associated with PCDs will enhance their clinical utility.