Search research articles

ABOUT JoVE

Overview Leadership Blog JoVE Help Center

AUTHORS

Publishing Process Editorial Board Scope & Policies Peer Review FAQ Submit

LIBRARIANS

Testimonials Subscriptions Access Resources Library Advisory Board FAQ

RESEARCH

JoVE Journal Methods Collections JoVE Encyclopedia of Experiments Archive

EDUCATION

JoVE Core JoVE Business JoVE Science Education JoVE Lab Manual Faculty Resource Center Faculty Site

Terms & Conditions of Use

Related Concept Videos

Computed Tomography

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 for Cardiovascular System V: CT

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 Tomography

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 MRI

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...

You might also read

Related Articles

Articles linked to this work by shared authors, journal, and citation graph.

Sort by

Same author

Nitrate reduction for survival in a nanomolar world, not the millimolar world of a laboratory.

Advances in microbial physiology·2025

Same author

Anaerobic bacterial response to nitric oxide stress: Widespread misconceptions and physiologically relevant responses.

Molecular microbiology·2021

Same author

Reinforcement and a cline in mating behaviour evolve in response to secondary contact and hybridization in shield-back katydids (Orthoptera: Tettigoniidae).

Journal of evolutionary biology·2016

Same author

Enteral feeding reduces metabolic activity of the intestinal microbiome in Crohn's disease: an observational study.

European journal of clinical nutrition·2016

Same author

Implications of aligning full registration of doctors with medical school graduation: a qualitative study of stakeholder perspectives.

BMJ open·2016

Same author

Radiation dosimetry for wide-beam CT scanners: recommendations of a working party of the Institute of Physics and Engineering in Medicine.

The British journal of radiology·2013

Search research articles

Related Experiment Video

Updated: Jun 27, 2026

Proton Therapy Delivery and Its Clinical Application in Select Solid Tumor Malignancies

Proton Therapy Delivery and Its Clinical Application in Select Solid Tumor Malignancies

Published on: February 6, 2019

A comparison of shielding calculation methods for multi-slice computed tomography (CT) systems.

J A Cole¹, D J Platten

¹KCARE, Medical Engineering and Physics, Faraday Building, King's College Hospital NHS Foundation Trust, London, UK. jonathan.cole@nhs.net

Journal of Radiological Protection : Official Journal of the Society for Radiological Protection

|November 26, 2008

Summary

Current UK shielding calculations for computed tomography (CT) systems may overestimate lead shielding requirements. This study found that existing methods frequently overestimate scattered radiation compared to actual measurements, suggesting a need for updated shielding guidelines.

More Related Videos

Positron Emission Tomography-based Dose Painting Radiation Therapy in a Glioblastoma Rat Model using the Small Animal Radiation Research Platform

Positron Emission Tomography-based Dose Painting Radiation Therapy in a Glioblastoma Rat Model using the Small Animal Radiation Research Platform

Published on: March 24, 2022

Image Rendering Techniques in Postmortem Computed Tomography: Evaluation of Biological Health and Profile in Stranded Cetaceans

Published on: September 27, 2020

Related Experiment Videos

Last Updated: Jun 27, 2026

Proton Therapy Delivery and Its Clinical Application in Select Solid Tumor Malignancies

Proton Therapy Delivery and Its Clinical Application in Select Solid Tumor Malignancies

Published on: February 6, 2019

Positron Emission Tomography-based Dose Painting Radiation Therapy in a Glioblastoma Rat Model using the Small Animal Radiation Research Platform

Positron Emission Tomography-based Dose Painting Radiation Therapy in a Glioblastoma Rat Model using the Small Animal Radiation Research Platform

Published on: March 24, 2022

Image Rendering Techniques in Postmortem Computed Tomography: Evaluation of Biological Health and Profile in Stranded Cetaceans

Published on: September 27, 2020

Area of Science:

Medical Physics
Radiological Protection
Diagnostic Imaging

Background:

Current UK shielding calculations for computed tomography (CT) systems rely on 2000-era guidelines.
International concerns exist regarding the accuracy of existing CT dose plots and the impact of new scanner technologies.
The National Council on Radiation Protection (NCRP) in the USA has proposed more recent shielding methodologies.

Purpose of the Study:

To evaluate the accuracy of current UK shielding calculation methods for CT systems.
To compare the BIR-IPEM and NCRP shielding calculation methods against measured scattered radiation.
To assess the adequacy of lead shielding based on existing and proposed calculation methods.

Main Methods:

Thermoluminescent detectors (TLDs) were deployed in three CT scanner rooms for extended periods.
Patient workload data, including dose length product (DLP) and tube current-time product (mAs), were collected.
Calculated scatter radiation using BIR-IPEM and NCRP methods was compared with TLD-measured scatter air kerma.

Main Results:

Calculated scattered air kerma and required lead shielding were frequently overestimated compared to measured values.
On average, calculated scatter was almost five times higher than the measured scattered air kerma.
The findings indicate potential overestimation of shielding requirements by current methods.

Conclusions:

Existing UK shielding calculation methods for CT systems may lead to excessive lead shielding.
The study highlights the need for revising current shielding guidelines to reflect actual radiation levels and new technologies.
Implementing updated shielding methodologies could optimize radiation protection and resource allocation in CT facilities.