Jove
Visualize
Contact Us

Related Experiment Videos

A general cavity theory

J A Haider1, L D Skarsgard, G K Lam

  • 1School of Medicine, East Carolina University, Department of Radiation Oncology, Greenville, NC 27858-4354, USA.

Physics in Medicine and Biology
|March 1, 1997
PubMed
Summary

A new cavity theory improves dose calculations in radiation detection by accounting for secondary-electron backscattering. This method offers better agreement with experimental results across various materials and radiation types.

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

Germline TP53 mutations is common in patients with two early-onset primary malignancies.

Clinical genetics·2014
Same author

Inhaled nitric oxide for primary pulmonary hypertension in pregnancy.

Obstetrics and gynecology·2001
Same author

Radiobiology with heavy charged particles: a historical review.

Physica medica : PM : an international journal devoted to the applications of physics to medicine and biology : official journal of the Italian Association of Biomedical Physics (AIFB)·2001
Same author

Lack of correlation between G1 arrest and radiation age-response in three synchronized human tumour cell lines.

International journal of radiation biology·1999
Same author

Cell-age heterogeneity and deviations from the LQ model in the radiation survival responses of human tumour cells.

International journal of radiation biology·1999
Same author

Evidence for two forms of substructure in the cell survival curve--mechanisms and clinical consequences.

Acta oncologica (Stockholm, Sweden)·1999
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 Dosimetry
  • Detector Physics

Background:

  • Cavity theories relate radiation dose in a detector's sensitive volume to the surrounding medium.
  • Existing theories like Burlin's and Kearsley's have limitations in accuracy, especially with high atomic number materials or specific radiation energies.

Purpose of the Study:

  • To develop a novel cavity theory that accurately predicts dose deposition.
  • To address the shortcomings of previous theories by incorporating secondary-electron backscattering.

Main Methods:

  • Developed a new cavity theory incorporating secondary-electron backscattering from the medium into the cavity.
  • Validated the theory using experimental results from lithium fluoride thermoluminescence dosimeters.
  • Tested the theory with 60Co gamma rays and 10 MV x-rays in aluminum, copper, and lead.

Main Results:

  • The proposed theory demonstrates improved agreement with experimental data compared to Burlin and Kearsley theories.
  • Fewer, experimentally determinable parameters characterize the new theory.
  • Accurate dose predictions were achieved for both 60Co gamma rays and 10 MV x-rays.

Conclusions:

  • The new cavity theory provides a more accurate and practical approach to dose calculation in radiation detection.
  • It overcomes limitations of existing theories, offering better experimental correlation.
  • The methodical parameter determination enhances its applicability in diverse dosimetry scenarios.

Related Experiment Videos