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

A robust method of multileaf collimator (MLC) leaf-configuration verification.

S M Zhou1, L J Verhey

  • 1Department of Radiation Oncology, University of California, San Francisco 94143-0226, USA.

Physics in Medicine and Biology
|November 1, 1994
PubMed
Summary

This study introduces a robust method for verifying multileaf collimator (MLC) leaf positions using portal images. The technique accurately assesses treatment field edges, ensuring precise radiation therapy delivery.

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

[Chinese Expert Consensus on GnRH-a in Obstetrics and Gynecology].

Zhonghua fu chan ke za zhi·2025
Same author

Fourfold Anisotropic Magnetoresistance of L1_{0} FePt Due to Relaxation Time Anisotropy.

Physical review letters·2022
Same author

[An acute schistosomiasis case in Wuhan City imported from another province of China in 2020].

Zhongguo xue xi chong bing fang zhi za zhi = Chinese journal of schistosomiasis control·2022
Same author

Large ultrafast-modulated Voigt effect in noncollinear antiferromagnet Mn<sub>3</sub>Sn.

Nature communications·2021
Same author

[Clinical approach and prognosis of continuous neurological care after intensive care for the patients with severe and refractory anti-N-methyl-D-aspartate receptor encephalitis].

Zhonghua yi xue za zhi·2020
Same author

[Dynamic investigation of nutritional risk in patients with malignant tumor during hospitalization].

Zhonghua yi xue za zhi·2018

Area of Science:

  • Medical Physics
  • Radiation Oncology
  • Image Analysis

Background:

  • Accurate positioning of multileaf collimator (MLC) leaves is critical for effective radiation therapy.
  • Existing methods for leaf-position verification can be limited by image quality and anatomical interference.

Purpose of the Study:

  • To develop and validate a novel, robust method for verifying MLC leaf positions using portal imaging.
  • To adaptively match prescribed leaf configurations with actual treatment field edges.

Main Methods:

  • Utilized Hough-type transformation for edge-line-orientation detection.
  • Employed chamfer-matching for adaptive parameter fitting (translation, rotation, scaling).
  • Exploited the parallel/perpendicular nature of MLC-generated edge lines.

Related Experiment Videos

Main Results:

  • The method accurately verifies MLC leaf positions even with noisy or partially obscured portal images.
  • Adaptive parameter matching achieved reliable comparison between prescribed and actual leaf configurations.
  • The system provides a rapid "go-or-no-go" decision based on clinical tolerances.

Conclusions:

  • The proposed method offers a robust and efficient solution for MLC leaf-position verification.
  • This technique enhances quality assurance in radiation therapy by ensuring accurate treatment delivery.
  • The approach is resilient to common image artifacts, improving clinical applicability.