• Home
  • About Us
    • Member Directory
    • Contact Us
  • Blogs
    • Scientific Blogs
      • Technology
      • Environment
      • Health
    • Infinity Explorer
    • Traveler Book
    • Life Around
  • Publication
  • Scientific Advisory
  • Project
    • Future Projects
    • Ongoing Projects
    • Previous Projects
  • Services
    • Language Programs
    • Latest Software
    • Environmental Consultancy
    • Internship
    • Exercise
  • Career
    • Masters
    • PHDs
    • Postdoctorals
    • Travel Grants
    • Others

A vertical matrix X-ray detector for multi-energy discrimination

A vertical matrix X-ray detector for multi-energy discrimination

X-ray detector

Share:

Twitter
Tweet
LinkedIn
Share
Facebook
fb-share-icon
WeChat
Follow by Email
Hardin Bitsky

Hardin Bitsky

Mr. Hardin, a future doctor of pharmacy, provides services as a content writer for scientific and technical niches.

There are three types of cone cells in the retina that are called L-cones (sensitive to red light), M-cones (sensitive to green light), and S-cones (sensitive to blue light). The coordinated response of cone cells to visible light in the wavelength range of 400-780 nm lets us see the colorful world. In the wavelength range of invisible X-ray (1 pm—10 nm), X-ray detectors perform the same function as “eyes.” However, X-ray detectors generally apply charge-integration-mode detection, which cannot distinguish wavelength and energy. Therefore, digital radiography and CT examinations can only obtain grayscale imaging.

In fact, the photon energy of X-rays carries a lot of information. The X-ray attenuation ability depends on the energy of the emitted photons and the density and composition of the penetrated object. The development of X-ray detection for dual-energy or multi-energy discrimination is an important research direction in related fields. These detectors are beneficial for distinguishing substances of different densities, enhancing imaging contrast between organic and inorganic objects, and identifying soft substances (rubber, plastic, soft tissue, etc.) that absorb radiation poorly.

In addition, the detector can also extract images of different substances at the same location using digital subtraction, such as subtracting bones and only preserving the lung image in a chest radiograph. However, at present, the energy discrimination of double-layer detectors cannot meet the complex imaging requirements. And the indirect X-ray detection mode (X-ray→visible light→electron charge) that now is applied commonly limits the detection sensitivity, which requires a high radiation dose for clear imaging.

In a new paper published in Light Science & Application, a team of scientists, led by Professor Guangda Niu and Professor Jiang Tang from Wuhan National Laboratory for Optoelectronics, Huazhong University of Science and Technology demonstrate, China, and co-workers have demonstrated, for the first time, the novel design of “vertical matrix” direct perovskite X-ray detectors (X-ray→electron charge) for multi-energy detection. The term “vertical matrix” means that the detector array is aligned along the incident direction of an X-ray rather than perpendicular to the incident direction. The principle is that X-ray photons with different energy have different attenuation depths within the vertical matrix, and low-energy photons deposit most of the energy in the shallow layers and high-energy photons in deeper layers. Thereby, the vertical matrix could restore the X-ray spectrum in detail. In addition, this X-ray detector can realize effective multi-energy discrimination under a single exposure, which has not been achieved in traditional detectors. With the aid of subtraction method, it could clearly distinguish objects with low and high densities.

In this paper, the researchers constructed the conversion matrix between the X-ray energy spectrum and the vertical matrix electrode responses in five ranges. The conversion matrix is universal to different X-ray spectra, which only depends on the structure and properties of the detector itself.

“For demonstration, we accurately derived the cut-off energy values for unknown X-ray sources. The elements of the reconstructed spectral matrix not only have clear cut-off edges that match the actual driving voltages (45 kVp, 55 kVp, 65 kVp), but also have small gaps with the simulated X-ray spectral intensities as 10.41% (45 kVp), 2.77% (55 kVp), 2.97% (65 kVp) respectively. This good match proves the effectiveness of the conversion matrix,” the study states.

“We proportionally used CaCO3, PDMS and paraffin with similar densities to replace the three most important components in the human body, skeletal, blood and muscle, and fat for multi-energy X-ray imaging applications. The low-density substances have higher imaging contrast from the front-end electrode, and the heavy substances are imaging more clearly in the back-end electrode. Multiple groups images of different substances can be separated by digital subtraction. The vertical matrix detector could produce a set of images containing the density-graded information under single exposure, and locate the concealed position for all low-, medium- and high-density substances.”

“The vertical matrix perovskite detector can paint color to black-and-white X-ray photos and provide more hidden information in applications such as disease diagnosis. It brings encouraging opportunities for next-generation low cost X-ray spectrometer with energy resolution, substance discrimination and imaging contrast enhancement,” the scientists say.

You may like to read:            

For the first time, researchers have observed an X-ray explosion on a white dwarf

Cooling speeds up electrons in bacterial nanowires

PrevPreviousNanomaterial-Based Virus Sensors
NextDevelopment of high-durability single-atomic catalysts using industrial humidifierNext

LATEST Blogs

Breakfast and health problems

Skipping Breakfast May Increase a Child’s Risk of Psychosocial Health Problems

September 7, 2022
James webb telescope

NASA’s Webb Space Telescope Captures a Cosmic Tarantula

September 7, 2022

Worse Than Smoking – Bad Sleep Can Worsen Lung Disease

August 31, 2022
Nanotechnology

Dr. Muhammad Adeel Addressed the International Con-ference as keynote speaker

August 23, 2022
Benefits of Mushrooms

Top 10 Health Benefits of Mushrooms, the Ultimate Superfood

August 18, 2022

New Way Invented To Produce Oxygen on Mars for Future Explorers

August 18, 2022

Evidence of Unprecedented Modern Sea-Level Rise Found in Ancient Caves

August 18, 2022

Research Shows Salt Substitutes Lower Risk of Heart Attack/Stroke and Death

August 13, 2022
covid symptoms

Hair Loss and Sexual Dysfunction Join Fatigue and Brain Fog in List of Long COVID Symptoms

August 13, 2022
protein

Most People Are Eating Too Much Protein – And It Has Serious Consequences

August 13, 2022

Categories

  • Scientific Blogs
  • Infinity Explorer
  • Traveler Book
  • Life Around

If you have tried to make a difference and you believe you deserve to be acknowledge, then please submit your story to us

Subscribe

Virtual Green Innovation Hub (VGI-H) is an emerging platform for young researchers which works as a bridge between You and the society.

Useful Links

Home
About us
Blogs

Subscribe Now

Don’t miss our future updates! Get Subscribed Today!

Copyright ©2022 Virtual Green Innovation Hub. All Rights Reserved.

Don’t miss our future updates. Get Subscribed Today!