Jove
Visualize
Contact Us

Related Experiment Videos

A study on virtual source position for electron beams from a Mevatron MD linear accelerator.

B P Ravindran1

  • 1Department of Radiation Oncology, Christian Medical College and Hospital, Vellore, India. paul@cmcvellore.ac.in

Physics in Medicine and Biology
|June 15, 1999
PubMed
Summary

The virtual source position (VSP) for electron beams is machine-dependent and requires individual measurement for each linear accelerator. This study investigated VSP for a Mevatron MD accelerator, comparing methods and analyzing shielding effects.

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

Development of collimator insert for linac based stereotactic irradiation.

Physics in medicine and biologyยท1999
See all related articles
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

Area of Science:

  • Medical Physics
  • Radiation Oncology

Background:

  • Accurate determination of the virtual source position (VSP) is crucial for precise electron beam radiotherapy.
  • The VSP influences beam geometry and dose distribution calculations.

Purpose of the Study:

  • To measure the VSP for a Mevatron MD linear accelerator across various electron beam energies (5-14 MeV) and applicators.
  • To investigate and compare different methods for determining VSP.
  • To assess the impact of shielding on VSP for specific applicators.

Main Methods:

  • Experimental measurement of VSP using a Mevatron MD linear accelerator.
  • Evaluation of multiple techniques for VSP determination.
  • Comparative analysis of obtained VSP values with existing literature.

Related Experiment Videos

  • Investigation into the effect of applicator shielding on VSP.

    • Main Results:

    • The virtual source position (VSP) was determined for electron beams of 5, 7, 9, 10, 12, and 14 MeV.
    • Significant machine dependency of VSP was observed, highlighting the need for accelerator-specific measurements.
    • Different methods yielded comparable VSP values, with variations noted.
    • Shielding of applicators was found to influence the VSP.

    Conclusions:

    • The virtual source position (VSP) is highly dependent on the specific linear accelerator model and must be measured individually.
    • The findings underscore the importance of precise VSP determination for accurate treatment planning in electron beam therapy.
    • Applicator design and shielding can affect the VSP, necessitating careful consideration in clinical practice.