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Related Concept Videos

Imaging Studies III: Computed Tomography01:27

Imaging Studies III: Computed Tomography

DefinitionComputed Tomography (CT) of the genitourinary (GU) tract is a non-invasive imaging modality that utilizes X-rays and computer processing to generate detailed cross-sectional images of the urinary system, encompassing the kidneys, ureters, bladder, and adjacent structures such as the adrenal glands.PurposeCT scans of the GU tract serve several diagnostic and therapeutic purposes, including:Diagnosis of Urinary Tract Diseases: Detects kidney stones, tumors, cysts, and congenital...
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...
Imaging Studies II: Positron Emission Tomography and Scintigraphy01:25

Imaging Studies II: Positron Emission Tomography and Scintigraphy

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.
Fundamental Principles of PET
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...
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...
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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Photoacoustic Cystography
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Published on: June 11, 2013

Photon Counting CT in Abdominal Emergency Radiology.

Daniel Parrott1, Bari Dane1

  • 1New York University, New York, USA.

Seminars in Roentgenology
|June 22, 2026
PubMed
Summary
This summary is machine-generated.

Photon counting computed tomography (CT) provides spectral imaging, reducing radiation dose and enhancing image quality. This technology improves diagnostic capabilities in emergency abdominal imaging, aiding in the assessment of acute conditions and characterizing abnormalities.

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Continuous Blood Sampling in Small Animal Positron Emission Tomography/Computed Tomography Enables the Measurement of the Arterial Input Function
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Last Updated: Jun 24, 2026

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Published on: August 8, 2019

Area of Science:

  • Medical Imaging
  • Radiology
  • Photon Counting Technology

Background:

  • Traditional CT scanners have limitations in spectral imaging and radiation dose.
  • Photon counting CT (PCCT) represents a technological advancement in X-ray imaging.
  • PCCT offers inherent spectral information and improved detection capabilities.

Purpose of the Study:

  • To review the benefits of photon counting CT in emergency abdominal imaging.
  • To highlight the diagnostic advantages of PCCT for acute conditions.
  • To discuss the role of spectral reconstructions in improving CT efficacy.

Main Methods:

  • Review of existing literature and clinical applications of PCCT in emergency settings.
  • Analysis of image quality, radiation dose reduction, and diagnostic performance of PCCT.
  • Evaluation of spectral reconstruction techniques like iodine maps and virtual non-contrast images.

Main Results:

  • PCCT provides spectral data on every scan, enabling advanced image analysis.
  • Significant reductions in radiation exposure are achievable with improved image quality and spatial resolution.
  • Enhanced diagnostic capabilities include improved characterization of renal stones and incidental masses.
  • PCCT demonstrates clear benefits in assessing acute abdominal conditions in emergency departments.

Conclusions:

  • Photon counting CT offers substantial advantages for emergency abdominal imaging.
  • The spectral capabilities and improved image quality of PCCT enhance diagnostic accuracy.
  • PCCT is a valuable tool for reducing radiation dose while improving patient care in emergency radiology.