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 Experiment Videos

Dynamic wedge versus physical wedge: a Monte Carlo study.

R Shih1, X A Li, J C Chu

  • 1Department of Radiation Oncology, Tri-Service General Hospital and National Defense Medical College, Nehoo Taipei, Taiwan. rpshih1@hotmail.com

Medical Physics
|May 8, 2001
PubMed
Summary
This summary is machine-generated.

Related Concept Videos

You might also read

Related Articles

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

Sort by
Same author

Quantitative evaluation of bronchoalveolar lavage for the treatment of severe Mycoplasma pneumoniae pneumonia in children-A new complementary index: Bronchial Insufflation Sign Score.

Journal of clinical ultrasound : JCU·2024
Same author

Practice variation in the diagnosis of acute rejection among pediatric heart transplant centers: An analysis of the pediatric heart transplant society (PHTS) registry.

The Journal of heart and lung transplantation : the official publication of the International Society for Heart Transplantation·2021
Same author

Diagnostic value of joint detection of white blood cells, blood glucose, and serum lactic acid for hand-foot-and-mouth disease.

Journal of biological regulators and homeostatic agents·2020
Same author

[To reconstruct facial defects after removing skin lesions by using local flap].

Lin chuang er bi yan hou tou jing wai ke za zhi = Journal of clinical otorhinolaryngology head and neck surgery·2019
Same author

Serial T2-Weighted Magnetic Resonance Images Acquired on a 1.5 Tesla Magnetic Resonance Linear Accelerator Reveal Radiomic Feature Variation in Organs at Risk: An Exploratory Analysis of Novel Metrics of Tissue Response in Prostate Cancer.

Cureus·2019
Same author

Variation assessment of deformable registration in stereotactic radiosurgery.

Radiography (London, England : 1995)·2018

Dynamic wedges (DW) have significantly less impact on beam spectra and electron contamination compared to physical wedges (PW). This study highlights key dosimetric differences crucial for clinical applications and commissioning of dynamic wedges.

Area of Science:

  • Medical Physics
  • Radiation Oncology
  • Radiotherapy Physics

Background:

  • Physical wedges (PW) are traditional tools used in radiotherapy to shape radiation beams.
  • Dynamic wedges (DW) offer an alternative method for beam shaping, potentially altering radiation characteristics differently than PW.
  • Understanding these differences is crucial for accurate dose delivery and treatment planning.

Purpose of the Study:

  • To analyze the characteristics of dynamic wedges (DW).
  • To compare the effects of DW versus physical wedges (PW) on beam spectra, energy fluence, angular distribution, electron contamination, and dose distributions.
  • To provide data for dynamic wedge commissioning.

Main Methods:

  • Utilized EGS4/BEAM Monte Carlo codes to simulate a 6 MV photon beam and calculate 3D dose distributions.

Related Experiment Videos

  • Simulated DW using segmented treatment tables (STT).
  • Validated Monte Carlo simulations by measuring percentage depth dose curves and beam profiles against experimental data (film, ionization chambers in water phantom).

    • Main Results:

    • Monte Carlo simulations showed excellent agreement (within 2%) with experimental measurements.
    • DW exhibited significantly less impact on beam spectral and angular distributions and electron contamination compared to PW.
    • A 45-degree PW caused a 30% increase in mean photon energy (beam hardening) and a 5% dose reduction in the build-up region, effects not observed with DW.

    Conclusions:

    • Dynamic wedges (DW) have a less significant effect on photon beam spectra and electron contamination compared to physical wedges (PW).
    • Significant dosimetric differences exist between DW and PW, impacting their clinical utility.
    • The findings offer valuable data for the commissioning of dynamic wedges in radiotherapy.