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

Application of constrained optimization to radiotherapy planning.

O A Sauer1, D M Shepard, T R Mackie

  • 1Universität Würzburg, Klinik für Strahlentherapie, Würzburg, Germany. sauer@mail.uni-wuerzberg.de

Medical Physics
|December 10, 1999
PubMed
Summary

A new constrained optimization method for intensity modulated radiotherapy (IMRT) planning ensures tumor control and minimizes side effects. This approach is computationally efficient and uses clinically relevant dose limits, avoiding drawbacks of current methods.

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

Poster - Thur Eve - 46: The upcoming international code of practice for small static photon field dosimetry.

Medical physics·2017
Same author

[Not Available].

Strahlentherapie und Onkologie : Organ der Deutschen Rontgengesellschaft ... [et al]·2016
Same author

Monte Carlo computed machine-specific correction factors for reference dosimetry of TomoTherapy static beam for several ion chambers.

Medical physics·2012
Same author

Monte Carlo-based simulation of dynamic jaws tomotherapy.

Medical physics·2011
Same author

State of the art on dose prescription, reporting and recording in Intensity-Modulated Radiation Therapy (ICRU report No. 83).

Cancer radiotherapie : journal de la Societe francaise de radiotherapie oncologique·2011
Same author

Introducing an on-line adaptive procedure for prostate image guided intensity modulate proton therapy.

Physics in medicine and biology·2011

Area of Science:

  • Medical Physics
  • Radiation Oncology
  • Computational Biology

Background:

  • Accurate photon fluence distribution calculation is crucial for intensity modulated radiotherapy (IMRT).
  • Current optimization methods for IMRT face challenges with convergence and require extensive user input.
  • Individual radiobiological parameters for organs are not yet sufficiently accurate for widespread clinical use.

Purpose of the Study:

  • To implement and test a constrained optimization method for IMRT treatment planning.
  • To develop an objective function that reflects clinical goals of tumor control and low side effect probability.
  • To overcome limitations of existing optimization techniques, such as convergence issues and reliance on user guidance.

Main Methods:

  • A constrained optimization method was implemented in a prototype IMRT treatment planning system.

Related Experiment Videos

  • Tumor control was ensured by setting a lower boundary for target dose.
  • Minimizing dose to organs at risk was achieved by setting optional parameters like threshold dose or upper dose limits, avoiding dose-volume constraints.

    • Main Results:

    • The method was benchmarked using head and neck and lung cancer cases.
    • Significant dose reduction to organs at risk was observed with at least seven beam ports.
    • Setting upper dose limits proved computationally efficient and provided direct control over maximum dose, unlike modeling relative seriality.

    Conclusions:

    • The constrained optimization approach guarantees high tumor control probability and is computationally efficient.
    • It avoids the drawbacks of current methods, offering a more practical solution for IMRT planning.
    • The use of clinically relevant dose limits simplifies user input and enhances optimization reliability.