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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...
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A scanning electron microscope (SEM) is used to study the surface features of a sample by using an electron beam that scans the sample surface in a two-dimensional manner. Typically, areas between ~1 centimeter to 5 micrometers in width can be imaged. SEM can be used to image bacteria, viruses, tissues as well as larger samples like insects. Conventional SEM gives a magnification ranging from 20X to 30,000X and spatial resolution of 50 to 100 nanometers.
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The most common cardiovascular diagnostic test is an X-ray. It produces images of the heart, blood vessels, and adjacent structures.
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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...
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Characterizing Emerging Detector Materials for Low-Dose X-Ray Imaging.

Kostiantyn Sakhatskyi1,2, Vitalii Bartosh1,2, Ying Zhou3

  • 1Laboratory of Inorganic Chemistry, Department of Chemistry and Applied Biosciences, ETH Zürich, Zürich, CH-8093, Switzerland.

Advanced Materials (Deerfield Beach, Fla.)
|September 11, 2025
PubMed
Summary

This study provides guidelines for characterizing new X-ray detector materials for medical imaging. It focuses on Detective Quantum Efficiency (DQE) to ensure high-quality, low-dose imaging.

Keywords:
X‐ray detectorsdetective quantum efficiencylead halide perovskiteslow‐dose imagingmedical imagingmetal halide scintillatorsnoise equivalent dose

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Area of Science:

  • Medical Imaging
  • Materials Science
  • Physics

Background:

  • X-ray medical imaging detectors are crucial for diagnostics, balancing image quality with patient radiation safety.
  • Emerging materials like lead-based perovskites are explored for X-ray detection, but their performance metrics are often unclear.
  • Accurate characterization is needed to assess practical utility in low-dose applications.

Purpose of the Study:

  • To survey methods for characterizing emerging X-ray detector materials.
  • To focus on Detective Quantum Efficiency (DQE) for low-dose medical imaging.
  • To provide guidelines for selecting, estimating, and presenting key performance metrics.

Main Methods:

  • Review of various characterization approaches for novel X-ray detector materials.
  • Emphasis on Detective Quantum Efficiency (DQE) as a critical figure of merit.
  • Inclusion of other relevant metrics: Detection Efficiency, Noise Equivalent Dose, response time, and spatial resolution.

Main Results:

  • Identified inconsistencies and limitations in reported performance data for new X-ray detector materials.
  • Proposed standardized guidelines for evaluating materials, particularly DQE.
  • Development of computational tools (MATLAB, Mathcad, website) to aid characterization.

Conclusions:

  • Standardized characterization of X-ray detector materials is essential for advancing medical imaging.
  • Focusing on DQE and other key metrics ensures practical utility and patient safety.
  • Available tools facilitate consistent and reliable material assessment.