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Related Concept Videos

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Positron Emission Tomography (PET) is a medical imaging technique that provides crucial insights into the body's physiological functions at a molecular level. It is an indispensable resource for diagnosing, staging, and monitoring various illnesses, notably cancer, neurological disorders, and cardiovascular conditions.
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Radiological Investigation I: X-ray and CT01:30

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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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Imaging Studies for Cardiovascular System V: CT01:28

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Cardiac computed tomography (CT) scanning is an advanced cardiac imaging technique that utilizes CT technology, with or without intravenous (IV) contrast, to produce accurate cross-sectional virtual slices of specific areas of the heart, coronary circulation, and major blood vessels such as the aorta, pulmonary veins, and arteries. The computer processes these slices to generate three-dimensional images. Multidetector CT (MDCT) is a rapid form of CT scanning that captures multiple slices...
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X-ray Imaging01:24

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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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Updated: Aug 30, 2025

Computed Tomography-guided Time-domain Diffuse Fluorescence Tomography in Small Animals for Localization of Cancer Biomarkers
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Photon-Counting Detector CT: Key Points Radiologists Should Know.

Andrea Esquivel1, Andrea Ferrero1, Achille Mileto1

  • 1Department of Radiology, Mayo Clinic, Rochester, MN, USA.

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|September 1, 2022
PubMed
Summary
This summary is machine-generated.

Photon-counting detector (PCD) CT offers enhanced spatial resolution and iodine signal detection. This advanced CT technology improves image quality and diagnostic capabilities across various medical imaging subspecialties.

Keywords:
Clinical applicationsComputed tomographyDiagnostic imagingPhoton counting X-ray detectorsSpectral tomography

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Area of Science:

  • Medical Imaging
  • Radiology
  • Detector Technology

Background:

  • Photon-counting detector (PCD) CT utilizes direct X-ray conversion for energy signal recording.
  • PCD-CT design inherently improves spatial resolution and iodine signal quantification.
  • This technology enables multi-energy imaging, reduces electronic noise, and minimizes artifacts.

Purpose of the Study:

  • To review the clinical benefits of photon-counting detector CT.
  • To highlight advancements in spatial resolution, iodine signal, and noise reduction.
  • To explore applications across diverse radiological subspecialties.

Main Methods:

  • Review of clinical applications and technological advantages of PCD-CT.
  • Discussion of improved dose efficiency for low-dose and pediatric imaging.
  • Examination of multi-energy imaging capabilities, including virtual monoenergetic images and material classification.

Main Results:

  • PCD-CT achieves ultra-high spatial resolution, enabling lower dose scans and improved visualization in thoracic and musculoskeletal imaging.
  • Enhanced iodine signal aids in low-contrast abdominal imaging tasks.
  • Multi-energy capabilities, including virtual monoenergetic images and material decomposition, support abdominal, musculoskeletal, and cardiovascular diagnostics.
  • Dual-source PCD-CT provides high temporal resolution for cardiac and coronary imaging.

Conclusions:

  • Photon-counting detector CT represents a significant advancement in medical imaging technology.
  • Its benefits span multiple radiological subspecialties, offering improved diagnostic accuracy and efficiency.
  • PCD-CT facilitates lower dose imaging and enhanced visualization of anatomical structures and pathologies.