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

Computed Tomography01:10

Computed Tomography

9.2K
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...
9.2K
Imaging Studies for Cardiovascular System V: CT01:28

Imaging Studies for Cardiovascular System V: CT

448
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...
448
Imaging Studies III: Computed Tomography01:27

Imaging Studies III: Computed Tomography

495
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...
495
Imaging Studies I: CT and MRI01:14

Imaging Studies I: CT and MRI

1.0K
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...
1.0K
Imaging Studies II: Positron Emission Tomography and Scintigraphy01:25

Imaging Studies II: Positron Emission Tomography and Scintigraphy

678
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
678

You might also read

Related Articles

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

Sort by
Same author

Interleukin 1alpha, interleukin 1beta and interleukin 1 receptor gene polymorphisms in psoriatic arthritis.

Rheumatology (Oxford, England)·2003
Same author

System, environmental, and policy changes: using the social-ecological model as a framework for evaluating nutrition education and social marketing programs with low-income audiences.

Journal of nutrition education·2003
Same author

Review of evaluation tools used to assess the impact of nutrition education on dietary intake and quality, weight management practices, and physical activity of low-income audiences.

Journal of nutrition education·2003
Same author

Endothelial function and coagulant factors in growth hormone-treated hypopituitary adults receiving desmopressin.

The Journal of clinical endocrinology and metabolism·2003
Same author

Isolation of cytomegalovirus and foamy virus from the drill monkey (Mandrillus leucophaeus) and prevalence of antibodies to these viruses amongst wild-born and captive-bred individuals.

Archives of virology·2003
Same author

Does tape facilitate or inhibit the lower fibres of trapezius?

Manual therapy·2003

Related Experiment Video

Updated: Mar 2, 2026

Construction of a Preclinical Multimodality Phantom Using Tissue-mimicking Materials for Quality Assurance in Tumor Size Measurement
06:33

Construction of a Preclinical Multimodality Phantom Using Tissue-mimicking Materials for Quality Assurance in Tumor Size Measurement

Published on: July 29, 2013

11.7K

SU-E-J-174: ITV Variations as a Function of CT Geometry and Scan Time : A Simulation Study Using Patient Data.

S St James1, P Mishra1, R Berbeco1

  • 1Brigham and Women's Hospital, Boston, MA.

Medical Physics
|May 19, 2017
PubMed
Summary

Increasing computed tomography (CT) scan duration can decrease internal target volume (ITV) uncertainties in lung cancer patients. Longer scan durations significantly impact ITV definition more than CT scanner geometry, suggesting modified CT protocols may improve treatment planning.

Keywords:
CancerComputed tomographyGoldImage scannersLungsMedical image reconstructionMedical imaging

More Related Videos

Time-Resolved, Dynamic Computed Tomography Angiography for Characterization of Aortic Endoleaks and Treatment Guidance via 2D-3D Fusion-Imaging
09:32

Time-Resolved, Dynamic Computed Tomography Angiography for Characterization of Aortic Endoleaks and Treatment Guidance via 2D-3D Fusion-Imaging

Published on: December 9, 2021

3.6K
Four-Dimensional CT Analysis Using Sequential 3D-3D Registration
05:05

Four-Dimensional CT Analysis Using Sequential 3D-3D Registration

Published on: November 23, 2019

8.5K

Related Experiment Videos

Last Updated: Mar 2, 2026

Construction of a Preclinical Multimodality Phantom Using Tissue-mimicking Materials for Quality Assurance in Tumor Size Measurement
06:33

Construction of a Preclinical Multimodality Phantom Using Tissue-mimicking Materials for Quality Assurance in Tumor Size Measurement

Published on: July 29, 2013

11.7K
Time-Resolved, Dynamic Computed Tomography Angiography for Characterization of Aortic Endoleaks and Treatment Guidance via 2D-3D Fusion-Imaging
09:32

Time-Resolved, Dynamic Computed Tomography Angiography for Characterization of Aortic Endoleaks and Treatment Guidance via 2D-3D Fusion-Imaging

Published on: December 9, 2021

3.6K
Four-Dimensional CT Analysis Using Sequential 3D-3D Registration
05:05

Four-Dimensional CT Analysis Using Sequential 3D-3D Registration

Published on: November 23, 2019

8.5K

Area of Science:

  • Medical Physics
  • Radiotherapy
  • Imaging Technology

Background:

  • The internal target volume (ITV) is crucial for accounting for tumor motion and shape uncertainties in radiotherapy planning.
  • Four-dimensional computed tomography (4DCT) is the standard imaging modality for ITV definition.
  • Optimizing CT acquisition parameters is essential for accurate ITV delineation.

Purpose of the Study:

  • To investigate the influence of CT scanner geometry and scan duration on internal target volume (ITV) definition.
  • To utilize gold fiducial markers in lung tumors to represent tumor motion for simulation.
  • To assess the impact of varying scan durations and CT geometries on ITV size.

Main Methods:

  • Geometric simulations were performed in MATLAB, excluding image reconstruction variations.
  • Simulated CT scanner geometries included a 4-slice scanner (10 mm axial field of view) and an 'ideal' scanner (100 mm axial field of view).
  • Scan durations were varied from 6 to 30 seconds per bed position, with a 25 mm diameter spherical tumor model.

Main Results:

  • Mean ITV consistently increased with increasing scan duration across all patients.
  • The maximum observed increase in mean ITV was 25% with extended scan duration.
  • Scan duration was identified as the primary factor influencing ITV size, surpassing scanner geometry effects.

Conclusions:

  • Modified CT protocols, such as increasing scan duration, can potentially reduce ITV uncertainties.
  • Decreasing scanner mA while increasing scan duration offers a strategy to manage radiation dose.
  • Scan duration is a more significant determinant of ITV than CT scanner geometry, guiding protocol optimization.