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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 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...
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
Imaging Studies for Cardiovascular System V: CT01:28

Imaging Studies for Cardiovascular System V: CT

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...
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...

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A Multicenter MRI Protocol for the Evaluation and Quantification of Deep Vein Thrombosis
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Published on: June 2, 2015

European Multicentre Study on Recurrent Imaging Practice in Computed Tomography.

Marco Brambilla1, Jenia Vassileva2, Simona Avramova-Cholakova3

  • 1Medical Physics Department, A.O.U. "Maggiore della Carità," Novara, Italy.

The British Journal of Radiology
|June 4, 2026
PubMed
Summary
This summary is machine-generated.

Recurrent CT imaging incidence proportion is recommended over prevalence for accurate assessment. A 75th percentile benchmark for cumulative effective dose can guide facility optimization and improve patient care.

Keywords:
computed tomographycumulative effective doserecurrent imagingreference level

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Area of Science:

  • Radiology and Medical Imaging
  • Health Services Research
  • Radiation Protection

Background:

  • Recurrent computed tomography (CT) imaging practices vary significantly across healthcare facilities.
  • Standardized metrics are needed to assess and benchmark these practices effectively.
  • Understanding patient CT exposure is crucial for radiation safety and optimizing diagnostic pathways.

Purpose of the Study:

  • To compare recurrent CT imaging practices across European centers using incidence and prevalence metrics.
  • To evaluate the feasibility of a new benchmarking tool for recurrent imaging.
  • To identify key indicators correlated with recurrent CT utilization.

Main Methods:

  • Data from 31 facilities in 18 European countries were analyzed.
  • Calculated incidence proportion (1-year and 3-year) and 3-year prevalence proportion of patients with cumulative effective dose (CED) ≥ 100 mSv.
  • Statistical analyses correlated these metrics with facility-specific indicators.

Main Results:

  • Across facilities, 1-year incidence ranged from 0-2.9%, 3-year incidence from 0-8.6%, and 3-year prevalence from 0-4.4%.
  • Strong linear correlation found between yearly CED quartiles and 1-year incidence.
  • The 75th percentile of facility 3rd quartile yearly CED was 17.6 mSv, lower than in prior studies.

Conclusions:

  • Incidence proportion is the recommended metric for assessing recurrent imaging due to prevalence underestimation.
  • The 75th percentile of 3rd quartile yearly CED serves as a benchmark for triggering optimization.
  • Addressing high recurrent CT rates is essential for enhancing patient care and radiation safety.