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 Concept Videos

Load-frequency control01:28

Load-frequency control

Load-frequency control (LFC) is vital for maintaining power system stability, ensuring that frequency and power flows remain within acceptable limits during load changes. Turbine-governor control eliminates rotor accelerations and decelerations following load changes. However, a steady-state frequency error persists when the change in the turbine-governor reference setting is zero. In an interconnected power system, each area agrees to export or import a scheduled amount of power through...
Linear Approximation in Frequency Domain01:26

Linear Approximation in Frequency Domain

Linear systems are characterized by two main properties: superposition and homogeneity. Superposition allows the response to multiple inputs to be the sum of the responses to each individual input. Homogeneity ensures that scaling an input by a scalar results in the response being scaled by the same scalar.
In contrast, nonlinear systems do not inherently possess these properties. However, for small deviations around an operating point, a nonlinear system can often be approximated as linear.
Three-Compartment Open Model01:06

Three-Compartment Open Model

The three-compartment open model is a pharmacokinetic model used to describe the distribution and elimination of drugs following extravascular administration. It comprises a central compartment representing the plasma and two peripheral compartments. The highly perfused peripheral compartment represents organs and tissues with a rich blood supply, such as the liver, kidneys, and lungs. The scarcely perfused peripheral compartment represents tissues with lower blood supply, such as adipose...

You might also read

Related Articles

Articles linked to this work by shared authors, journal, and citation graph.

Sort by
Same author

USPIO enhanced MR imaging in CNS tumors (UMIC): a study protocol.

Nanomedicine (London, England)·2026
Same author

Effects of carvacrol- and thymol-based essential oil feed additives on carcass characteristics and breast meat quality of broilers with or without Salmonella challenge.

Poultry science·2026
Same author

Prospective biomarkers of posttraumatic stress disorder in children and adolescents: a systematic review and meta-analysis.

Translational psychiatry·2026
Same author

Evaluating Sulfurization as a Blue Carbon Sink in a Southern California Salt Marsh.

Limnology and oceanography·2025
Same author

Illustrative case series of eosinophilia in UK Armed Forces personnel and recommended management for non-specialists.

BMJ military health·2025
Same author

Promoting the advancement of otology and audiology: a history of the Thomas Wickham-Jones (TWJ) Foundation.

The Journal of laryngology and otology·2024
Same journal

A comparison between EPSON V700 and EPSON V800 scanners for film dosimetry.

Australasian physical & engineering sciences in medicine·2020
Same journal

Nanodosimetric understanding to the dependence of the relationship between dose-averaged lineal energy on nanoscale and LET on ion species.

Australasian physical & engineering sciences in medicine·2020
Same journal

Schizophrenia diagnosis using innovative EEG feature-level fusion schemes.

Australasian physical & engineering sciences in medicine·2020
Same journal

Force decoding using local field potentials in primary motor cortex: PLS or Kalman filter regression?

Australasian physical & engineering sciences in medicine·2020
Same journal

EPSM 2019, Engineering and Physical Sciences in Medicine : 28-30 October 2019, Perth, Australia.

Australasian physical & engineering sciences in medicine·2020
Same journal

New name: Physical and Engineering Sciences in Medicine.

Australasian physical & engineering sciences in medicine·2020
See all related articles

Related Experiment Video

Updated: Jul 7, 2026

Characterization of Recombination Effects in a Liquid Ionization Chamber Used for the Dosimetry of a Radiosurgical Accelerator
07:31

Characterization of Recombination Effects in a Liquid Ionization Chamber Used for the Dosimetry of a Radiosurgical Accelerator

Published on: May 9, 2014

Linear attenuation coefficients for compensator based IMRT.

T Bartrum1, M Bailey, V Nelson

  • 1South Western Sydney Cancer Service, Macarthur & Liverpool Cancer Therapy Centres, Campbelltown, Australia.

Australasian Physical & Engineering Sciences in Medicine
|February 16, 2008
PubMed
Summary
This summary is machine-generated.

Commissioning compensating filters for intensity modulated radiation therapy (IMRT) requires understanding how material properties affect radiation. This study found that field size significantly influences attenuation coefficients, necessitating field-size-dependent values for optimal treatment planning.

More Related Videos

Dosimetry for Cell Irradiation using Orthovoltage (40-300 kV) X-Ray Facilities
06:51

Dosimetry for Cell Irradiation using Orthovoltage (40-300 kV) X-Ray Facilities

Published on: February 20, 2021

Irradiator Commissioning and Dosimetry for Assessment of LQ α and β Parameters, Radiation Dosing Schema, and in vivo Dose Deposition
06:20

Irradiator Commissioning and Dosimetry for Assessment of LQ α and β Parameters, Radiation Dosing Schema, and in vivo Dose Deposition

Published on: March 11, 2021

Related Experiment Videos

Last Updated: Jul 7, 2026

Characterization of Recombination Effects in a Liquid Ionization Chamber Used for the Dosimetry of a Radiosurgical Accelerator
07:31

Characterization of Recombination Effects in a Liquid Ionization Chamber Used for the Dosimetry of a Radiosurgical Accelerator

Published on: May 9, 2014

Dosimetry for Cell Irradiation using Orthovoltage (40-300 kV) X-Ray Facilities
06:51

Dosimetry for Cell Irradiation using Orthovoltage (40-300 kV) X-Ray Facilities

Published on: February 20, 2021

Irradiator Commissioning and Dosimetry for Assessment of LQ α and β Parameters, Radiation Dosing Schema, and in vivo Dose Deposition
06:20

Irradiator Commissioning and Dosimetry for Assessment of LQ α and β Parameters, Radiation Dosing Schema, and in vivo Dose Deposition

Published on: March 11, 2021

Area of Science:

  • Medical Physics
  • Radiation Oncology
  • Radiotherapy Treatment Planning

Background:

  • Technological advancements in 3-D radiotherapy treatment planning systems (RTPS) are increasing the use of compensating filters for intensity modulated radiation therapy (IMRT).
  • Accurate characterization of compensating filter materials is crucial for effective IMRT implementation.
  • Commissioning compensating filters involves measuring their physical properties, such as linear attenuation coefficients.

Purpose of the Study:

  • To measure the effective linear attenuation coefficients for aluminium and brass compensating filters used in IMRT.
  • To investigate the influence of various parameters (field size, depth, source surface distance) on these coefficients.
  • To establish guidelines for optimal commissioning of compensating filters for IMRT.

Main Methods:

  • Measurements of effective linear attenuation coefficients were performed for aluminium and brass compensators.
  • Experiments covered field sizes from 5 cm to 25 cm (5 cm increments) at 6 MV and 18 MV photon energies.
  • Percentage depth dose (PDD) curves were measured at varying depths (5-10 cm) and source surface distances (90-100 cm).

Main Results:

  • Effective linear attenuation coefficients showed no significant variation with chamber depth or source surface distance.
  • Field size was identified as the primary factor influencing the effective linear attenuation coefficient.
  • A correlation between attenuation coefficient and field size was observed up to 15 cm x 15 cm.

Conclusions:

  • Effective linear attenuation coefficients for IMRT compensating filters are dependent on field size.
  • Establishing two field-size-dependent linear attenuation coefficients is recommended for optimal patient treatments.
  • These findings contribute to improved accuracy and efficiency in IMRT treatment planning.