Jove
Visualize
Contact Us
JoVE
x logofacebook logolinkedin logoyoutube logo
ABOUT JoVE
OverviewLeadershipBlogJoVE Help Center
AUTHORS
Publishing ProcessEditorial BoardScope & PoliciesPeer ReviewFAQSubmit
LIBRARIANS
TestimonialsSubscriptionsAccessResourcesLibrary Advisory BoardFAQ
RESEARCH
JoVE JournalMethods CollectionsJoVE Encyclopedia of ExperimentsArchive
EDUCATION
JoVE CoreJoVE BusinessJoVE Science EducationJoVE Lab ManualFaculty Resource CenterFaculty Site
Terms & Conditions of Use
Privacy Policy
Policies

Related Concept Videos

Radiological Investigation I: X-ray and CT01:30

Radiological Investigation I: X-ray and CT

954
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...
954
Imaging Studies I: CT and MRI01:14

Imaging Studies I: CT and MRI

717
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...
717
Imaging Studies for Cardiovascular System V: CT01:28

Imaging Studies for Cardiovascular System V: CT

206
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...
206
Imaging Studies III: Computed Tomography01:27

Imaging Studies III: Computed Tomography

222
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...
222
Computed Tomography01:10

Computed Tomography

7.9K
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...
7.9K

You might also read

Related Articles

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

Sort by
Same author

Anterior sacral meningocele with S1 root incarceration: Marfan syndrome and its surgical management. Illustrative case.

Journal of neurosurgery. Case lessons·2026
Same author

Prognostic value of immediate and short-term postoperative biochemical markers for long-term remission in acromegaly: A single-center study.

Growth hormone & IGF research : official journal of the Growth Hormone Research Society and the International IGF Research Society·2026
Same author

The effectiveness of indirect revascularization on haemorrhagic moyamoya disease and the activities that trigger intracranial haemorrhage: a comprehensive study.

British journal of neurosurgery·2026
Same author

The clinical brake: Restoring conscience to care.

The American journal of medicine·2026
Same author

Response to comment on "Considering the unmeasured impact of 5-fluorouracil dose intensity in the interpretation of optimal initial relative dose intensity of modified FOLFIRINOX".

Journal of the Formosan Medical Association = Taiwan yi zhi·2026
Same author

Genotype and subependymal lesion burden influence volumetric response to everolimus in tuberous sclerosis complex-associated subependymal giant cell astrocytoma: A 10-year real-world study.

Neurotherapeutics : the journal of the American Society for Experimental NeuroTherapeutics·2026

Related Experiment Video

Updated: Dec 29, 2025

Multi-Tracer Studies of Brain Oxygen and Glucose Metabolism Using a Time-of-Flight Positron Emission Tomography-Computed Tomography Scanner
08:36

Multi-Tracer Studies of Brain Oxygen and Glucose Metabolism Using a Time-of-Flight Positron Emission Tomography-Computed Tomography Scanner

Published on: June 7, 2024

594

Eye Shielding During Head CT Scans: Dose Reduction and Image Quality Evaluation.

Yuan-Hao Lee1, Shih-Hung Yang2, Yen-Kuang Lin3

  • 1Department of Radiology, Wan Fang Hospital, Taipei Medical University, 111 Hsing-Long Road, Section 3, Taipei, Taiwan.

Academic Radiology
|February 8, 2020
PubMed
Summary

Eye shields reduce radiation dose to the lens during head CT scans but can cause artifacts. Topogram-based tube current modulation (TCM) minimizes these artifacts, preserving image quality for better periocular tissue visualization.

Keywords:
Eye shieldHead computed tomography scanImage qualityRadiation doseSafety

More Related Videos

Voluntary Breath-hold Technique for Reducing Heart Dose in Left Breast Radiotherapy
11:38

Voluntary Breath-hold Technique for Reducing Heart Dose in Left Breast Radiotherapy

Published on: July 3, 2014

47.3K
X-ray Dose Reduction through Adaptive Exposure in Fluoroscopic Imaging
08:30

X-ray Dose Reduction through Adaptive Exposure in Fluoroscopic Imaging

Published on: September 11, 2011

14.8K

Related Experiment Videos

Last Updated: Dec 29, 2025

Multi-Tracer Studies of Brain Oxygen and Glucose Metabolism Using a Time-of-Flight Positron Emission Tomography-Computed Tomography Scanner
08:36

Multi-Tracer Studies of Brain Oxygen and Glucose Metabolism Using a Time-of-Flight Positron Emission Tomography-Computed Tomography Scanner

Published on: June 7, 2024

594
Voluntary Breath-hold Technique for Reducing Heart Dose in Left Breast Radiotherapy
11:38

Voluntary Breath-hold Technique for Reducing Heart Dose in Left Breast Radiotherapy

Published on: July 3, 2014

47.3K
X-ray Dose Reduction through Adaptive Exposure in Fluoroscopic Imaging
08:30

X-ray Dose Reduction through Adaptive Exposure in Fluoroscopic Imaging

Published on: September 11, 2011

14.8K

Area of Science:

  • Radiology
  • Medical Imaging
  • Radiation Dosimetry

Background:

  • Head CT scans involve radiation exposure to sensitive organs like the eyes.
  • Eye shields are used to reduce radiation dose to the lens, but can introduce artifacts.
  • Tube current modulation (TCM) is a technique to optimize radiation dose and image quality.

Purpose of the Study:

  • To assess the radiation dose reduction to the lens using different eye shields.
  • To evaluate the impact of eye shields and tube current modulation (TCM) on image quality.
  • To compare fixed tube current with topogram-based TCM in head CT examinations with eye shielding.

Main Methods:

  • Patients undergoing head CT were assigned to groups with or without eye shields and with fixed or topogram-based TCM.
  • Radiation dose to the lens was measured using Gafchromic films.
  • Image quality and artifacts were assessed qualitatively by radiologists and quantitatively.

Main Results:

  • Barium sulfate and bismuth-antimony shields reduced lens radiation dose by up to 47%.
  • Shielding degraded intraocular but not intracranial image quality and induced artifacts.
  • Topogram-based TCM improved image quality and reduced artifacts compared to fixed tube current, especially with bismuth-antimony shields.

Conclusions:

  • Eye shields effectively reduce lens radiation dose in head CT.
  • Topogram-based TCM can mitigate artifacts caused by eye shields, maintaining diagnostic image quality.
  • This approach offers an alternative for optimizing CT scans without organ-based TCM.