Your browser doesn't support javascript.
loading
Assessment of four dose calculation algorithms using IAEA-TECDOC-1583 with medium dependency correction factor (Kmed) application.
Rostami, Aram; Khalid, Abdul Sattar; Ghafari, Hamed; Paloor, Satheesh Prasad; Peltier, Bevan Orville; Hammoud, Rabih; Abdelrahman, Shihab.
Afiliación
  • Rostami A; Radiation Oncology Department, National Center for Cancer Care and Research, Doha, Qatar. Electronic address: arostami@hamad.qa.
  • Khalid AS; Radiation Oncology Department, National Center for Cancer Care and Research, Doha, Qatar.
  • Ghafari H; Department of Medical Physics, School of Medicine, Iran University of Medical Sciences, Tehran, Iran.
  • Paloor SP; Radiation Oncology Department, National Center for Cancer Care and Research, Doha, Qatar.
  • Peltier BO; Radiation Oncology Department, National Center for Cancer Care and Research, Doha, Qatar.
  • Hammoud R; Radiation Oncology Department, National Center for Cancer Care and Research, Doha, Qatar. Electronic address: Rhammoud2@hamad.qa.
  • Abdelrahman S; Radiation Oncology Department, National Center for Cancer Care and Research, Doha, Qatar.
Phys Med ; 122: 103390, 2024 Jun.
Article en En | MEDLINE | ID: mdl-38833878
ABSTRACT

PURPOSE:

This study discusses the measurement of dose in clinical commissioning tests described in IAEA-TECDOC-1583. It explores the application of Monte Carlo (MC) modelled medium dependency correction factors (Kmed) for accurate dose measurement in bone and lung materials using the CIRS phantom.

METHODS:

BEAMnrc codes simulate radiation sources and model radiation transport for 6 MV and 15 MV photon beams. CT images of the CIRS phantom are converted to an MC compatible phantom. The PTW 30013 farmer chamber measures doses within modeled CIRS phantom. Kmed are determined by averaging values from four central voxels within the sensitive volume of the farmer chamber. Kmed is calculated for Dm.m and Dw.w algorithm types in bone and lung media for both photon beams.

RESULTS:

Average modelled correction factors for Dm.m calculations using the farmer chamber are 0.976 (±0.1 %) for 6 MV and 0.979 (±0.1 %) for 15 MV in bone media. Correspondingly, correction factors for Dw.w calculations are 0.99 (±0.3 %) and 0.992 (±0.4 %), respectively. For lung media, average correction factors for Dm.m calculations are 1.02 (±0.3 %) for 6 MV and 1.022 (±0.4 %) for 15 MV. Correspondingly, correction factors for Dw.w calculations are 1.01 (±0.3 %) and 1.012 (±0.2 %), respectively.

CONCLUSIONS:

This study highlights the significant impact of applying Kmed on dose differences between measurement and calculation during the dose audit process.
Asunto(s)
Palabras clave
Texto completo
Añadir a Mi BVS
Imprimir
XML
PubMed Links
Buscar en Google

Texto completo: 1 Colección: 01-internacional Base de datos: MEDLINE Asunto principal: Algoritmos / Método de Montecarlo / Fantasmas de Imagen Límite: Humans Idioma: En Revista: Phys Med Asunto de la revista: BIOFISICA / BIOLOGIA / MEDICINA Año: 2024 Tipo del documento: Article Pais de publicación: Italia
Texto completo
Añadir a Mi BVS
Imprimir
XML
PubMed Links
Buscar en Google

Texto completo: 1 Colección: 01-internacional Base de datos: MEDLINE Asunto principal: Algoritmos / Método de Montecarlo / Fantasmas de Imagen Límite: Humans Idioma: En Revista: Phys Med Asunto de la revista: BIOFISICA / BIOLOGIA / MEDICINA Año: 2024 Tipo del documento: Article Pais de publicación: Italia