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Related Concept Videos

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...
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...
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...
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...
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 for Cardiovascular System VI: Calcium -Scoring CT01:25

Imaging Studies for Cardiovascular System VI: Calcium -Scoring CT

Calcium-Scoring CT ScanA calcium-scoring CT scan, also known as coronary artery calcium (CAC) scan, detects calcium deposits in the coronary arteries. This test assesses the risk of coronary artery disease (CAD), which can lead to cardiovascular events such as angina, heart failure, and sudden cardiac arrest.A calcium-scoring CT scan is generally recommended for individuals at intermediate risk of CAD without symptoms. It includes:Men aged 40-75 and women aged 50-75: Especially those with a...

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Related Experiment Video

Updated: Jun 13, 2026

Lung CT Segmentation to Identify Consolidations and Ground Glass Areas for Quantitative Assesment of SARS-CoV Pneumonia
08:05

Lung CT Segmentation to Identify Consolidations and Ground Glass Areas for Quantitative Assesment of SARS-CoV Pneumonia

Published on: December 19, 2020

Should we be concerned about the rapid increase in CT usage?

David J Brenner1

  • 1Center for Radiological Research, Columbia University Medical Center, 630 West 168th Street, VC 11-230, New York, NY 10032, USA.

Reviews on Environmental Health
|May 1, 2010
PubMed
Summary

Computed tomography (CT) scans are increasing, leading to higher population radiation doses and a small cancer risk, especially in children. Technological advancements and clinical guidelines can mitigate these risks.

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Identifying Coronary Artery Calcification on Non-gated Computed Tomography Scans
04:40

Identifying Coronary Artery Calcification on Non-gated Computed Tomography Scans

Published on: August 28, 2018

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Last Updated: Jun 13, 2026

Lung CT Segmentation to Identify Consolidations and Ground Glass Areas for Quantitative Assesment of SARS-CoV Pneumonia
08:05

Lung CT Segmentation to Identify Consolidations and Ground Glass Areas for Quantitative Assesment of SARS-CoV Pneumonia

Published on: December 19, 2020

Identifying Coronary Artery Calcification on Non-gated Computed Tomography Scans
04:40

Identifying Coronary Artery Calcification on Non-gated Computed Tomography Scans

Published on: August 28, 2018

Area of Science:

  • Radiology
  • Medical Physics
  • Public Health

Background:

  • Medical radiation population dose has risen significantly in the past 20 years, primarily driven by increased computed tomography (CT) utilization.
  • Millions of adult and pediatric CT exams are performed annually in the US, delivering higher radiation doses than conventional radiological procedures.
  • Epidemiological evidence indicates a statistically significant, albeit small, increase in cancer risk associated with CT radiation doses, with children being more vulnerable.

Purpose of the Study:

  • To address the growing public health concerns stemming from increased population radiation dose due to widespread CT use.
  • To explore the potential for reducing radiation doses and associated risks through technological advancements and optimized CT utilization.
  • To evaluate strategies for minimizing unnecessary CT scans and improving patient communication regarding benefits and risks.

Main Methods:

  • Review of current trends in CT usage and associated population radiation dose.
  • Analysis of epidemiological data on cancer risk from CT radiation exposure.
  • Assessment of technological developments for dose reduction in CT.
  • Evaluation of the potential impact of clinical decision rules and alternative imaging modalities on unnecessary CT scans.

Main Results:

  • CT scans contribute significantly to the population dose from medical radiation, with substantial annual volumes in the US.
  • CT radiation doses, while individually small, are linked to a measurable increase in cancer risk, particularly in pediatric populations.
  • A notable proportion of CT scans may be medically unnecessary or could be replaced by lower-dose imaging techniques.
  • Technological advancements offer potential for significant radiation dose reduction per CT scan.

Conclusions:

  • The rise in CT utilization necessitates strategies to manage increasing population radiation doses and mitigate associated public health risks.
  • Reducing unnecessary CT scans through clinical decision rules and exploring alternative imaging modalities is crucial.
  • Ongoing technological innovation in CT imaging holds promise for lowering radiation doses and enhancing patient safety.
  • Effective communication between physicians and patients regarding CT benefits and risks is important for informed decision-making.