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

Dosimetric considerations for a multileaf collimator system

J R Palta1, D K Yeung, V Frouhar

  • 1Department of Radiation Oncology, University of Florida, College of Medicine, Gainesville 32610-0385, USA.

Medical Physics
|July 1, 1996
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

Innovations in Radiotherapy Technology.

Clinical oncology (Royal College of Radiologists (Great Britain))·2016
Same author

Dosimetric evaluation of a novel polymer gel dosimeter for proton therapy.

Medical physics·2010
Same author

Delayed complications of radiotherapy treatment for nasopharyngeal carcinoma: imaging findings.

Clinical radiology·2007
Same author

Human cervical lymphadenopathy: evaluation with in vivo 1H-MRS at 1.5 T.

Clinical radiology·2005
Same author

Dosimetric effect of source centering and residual plaque for beta-emitting catheter based intravascular brachytherapy sources.

Medical physics·2001
Same author

Liver iron estimation in beta-thalassaemia: comparison of MRI biochemical assay and histological grading.

Clinical radiology·2001
Same journal

Correction to "On the shape of the radiation survival curve in tumor spheroids: The role of oxygen heterogeneity".

Medical physics·2026
Same journal

Multi-view constrained semi-supervised vertebra detection for 3D ultrasound spine volume.

Medical physics·2026
Same journal

Accuracy of quantitative <sup>177</sup>Lu SPECT/CT imaging: A systematic review.

Medical physics·2026
Same journal

Physics-constrained dual-domain network for CBCT reconstruction from orthogonal X-rays in gynecologic radiotherapy.

Medical physics·2026
Same journal

Decomposition-based harmonization for quantitative PET imaging across scanners and radiotracers.

Medical physics·2026
Same journal

Development and evaluation of an in vivo dose-based monitoring system for electron FLASH radiation therapy.

Medical physics·2026
See all related articles

This study commissioned a linear accelerator with a multileaf collimator (MLC), finding its dosimetric parameters comparable to standard heads. However, MLCs resulted in a wider penumbra and lower output due to scattered radiation.

Area of Science:

  • Medical Physics
  • Radiation Oncology
  • Radiotherapy Equipment

Background:

  • Linear accelerators (LINACs) are crucial in modern radiotherapy.
  • Multileaf collimators (MLCs) enable precise beam shaping.
  • Commissioning new LINACs with MLCs requires thorough dosimetric evaluation.

Purpose of the Study:

  • To commission a commercial linear accelerator equipped with a factory-fitted multileaf collimator (MLC).
  • To evaluate the dosimetric parameters of the MLC-shaped photon beams (6-MV and 15-MV).
  • To compare MLC performance against conventional collimator jaws and literature data.

Main Methods:

  • Commissioning of a commercial linear accelerator with an integrated MLC.
  • Measurement of key dosimetric parameters: central axis depth-dose, output factors, wedge factors, penumbra, and leaf leakage.

Related Experiment Videos

  • Comparison of MLC-shaped fields with fields shaped by conventional collimator jaws (Lipowitz's metal/Cerrobend).

    • Main Results:

    • Depth-dose, output, and transmission factors were similar to existing literature for the same manufacturer's standard treatment head.
    • The MLC's effective penumbra was 3-4 mm wider than conventional jaws due to scalloping.
    • MLC-shaped fields showed a lower output (0.5%-4.5% for open fields, 1%-5% with wedges) compared to Cerrobend fields.
    • This output difference was attributed to variations in scattered radiation from the collimator head.

    Conclusions:

    • The commissioned linear accelerator with MLC performs comparably to standard machines in most dosimetric aspects.
    • MLC implementation necessitates consideration of increased penumbra width and reduced output.
    • Scattered radiation from the collimator head is a significant factor influencing the dosimetric output of MLC-shaped fields.