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

Equivalent fields and scatter integration for photon fields.

Y Xiao1, B E Bjärngard, J Reiff

  • 1University of Pennsylvania, Philadelphia 19104, USA.

Physics in Medicine and Biology
|May 8, 1999
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

Overexpression of nuclear distribution protein (hNUDC) causes pro-apoptosis and differentiation in Dami megakaryocytes.

Cell proliferation·2013
Same author

Microparticle-associated tissue factor is recycled by endothelial cells resulting in enhanced surface tissue factor activity.

Thrombosis and haemostasis·2013
Same author

CMTM3 is frequently reduced in clear cell renal cell carcinoma and exhibits tumor suppressor activities.

Clinical & translational oncology : official publication of the Federation of Spanish Oncology Societies and of the National Cancer Institute of Mexico·2013
Same author

Antiproliferation and anti-migration induced by gypenosides in human colon cancer SW620 and esophageal cancer Eca-109 cells.

Human & experimental toxicology·2013
Same author

Dietary exposure of the Hong Kong adult population to polybrominated diphenyl ethers (PBDEs): results of the first Hong Kong Total Diet Study.

Food additives & contaminants. Part A, Chemistry, analysis, control, exposure & risk assessment·2013
Same author

Radiological and histopathological features of hepatic inflammatory myofibroblastic tumour: analysis of 10 cases.

Clinical radiology·2013
Same journal

Deep learning-based dose prediction to enhance planning efficiency in cervical brachytherapy with hybrid applicators.

Physics in medicine and biology·2026
Same journal

Corrigendum: Referenceless MR thermometry-a comparison of five methods (2017<i>Phys. Med. Biol</i>.<b>62</b>1-16).

Physics in medicine and biology·2026
Same journal

Corrigendum: Measured and Monte Carlo simulated electron backscatter to the monitor chamber for the varian TrueBeam linac (2016<i>Phys. Med. Biol</i>.<b>61</b>8779).

Physics in medicine and biology·2026
Same journal

Corrigendum: 3D range-modulator for scanned particle therapy: development, Monte Carlo simulations and experimental evaluation (2017<i>Phys. Med. Biol</i>.<b>62</b>7075).

Physics in medicine and biology·2026
Same journal

Recent progress in applications of computing to radiotherapy (ICCR 2016).

Physics in medicine and biology·2026
Same journal

Novel TMS coils designed using an inverse boundary element method.

Physics in medicine and biology·2026
See all related articles

This study introduces a new method for calculating radiation dose in oncology by integrating phantom-scatter dose using a functional representation. This approach offers improved accuracy over traditional equivalent-field methods, especially for complex treatment plans.

Area of Science:

  • Medical Physics
  • Radiation Oncology
  • Radiotherapy Dosimetry

Background:

  • Current methods for radiation dose calculation in oncology often use equivalent fields, which simplify calculations but introduce inaccuracies and have limited applicability.
  • Existing techniques like equivalent-field tables and the area-over-perimeter relation do not adequately account for depth and beam quality, crucial factors in dose distribution.

Purpose of the Study:

  • To evaluate an alternative method for calculating phantom-scatter dose using explicit integration with a functional representation (sigma).
  • To assess the accuracy and applicability of this new method for determining dose from phantom-scattered photons, particularly for irregular radiation fields.

Main Methods:

  • Developed a functional representation, sigma, for the ratio of scatter dose to primary dose, dependent on depth and field size.

Related Experiment Videos

  • Utilized a function where the integral for a right triangle is available in closed form, enabling dose calculation for irregular fields by summing contributions from triangular components.
  • Compared calculated doses using this method with measurements from irregular multi-leaf collimator (MLC)-shaped fields.

    • Main Results:

    • The functional representation (sigma) achieved approximately 1% error in total dose for high-energy x-rays.
    • This explicit integration method accurately accounts for depth and beam quality, unlike conventional equivalent-field approaches.
    • Calculations using summation over right triangles demonstrated good agreement with experimental measurements for irregular MLC-shaped fields.

    Conclusions:

    • The proposed computer-implemented integration of phantom-scatter dose, using the sigma function and geometric components like right triangles or sectors, can replace traditional tables and rules.
    • This method offers enhanced accuracy and accounts for factors ignored by current equivalent-field techniques.
    • The approach significantly reduces calculation time, proving particularly beneficial for complex radiotherapy techniques like intensity-modulated radiation therapy (IMRT) and inverse planning.