On the quantification of the dosimetric accuracy of collapsed cone convolution superposition (CCCS) algorithm for small lung volumes using IMRT.

Journal of Applied Clinical Medical Physics
Oscar I CalvoNikos Papanikolaou

Abstract

Specialized techniques that make use of small field dosimetry are common practice in today's clinics. These new techniques represent a big challenge to the treatment planning systems due to the lack of lateral electronic equilibrium. Because of this, the necessity of planning systems to overcome such difficulties and provide an accurate representation of the true value is of significant importance. Pinnacle3 is one such planning system. During the IMRT optimization process, Pinnacle3 treatment planning system allows the user to specify a minimum segment size which results in multiple beams composed of several subsets of different widths. In this study, the accuracy of the engine dose calculation, collapsed cone convolution superposition algorithm (CCCS) used by Pinnacle3, was quantified by Monte Carlo simulations, ionization chamber, and Kodak extended dose range film (EDR2) measurements for 11 SBRT lung patients. Lesions were < 3.0 cm in maximal diameter and <27.0cm3 in volume. The Monte Carlo EGSnrc\BEAMnrc and EGS4\MCSIM were used in the comparison. The minimum segment size allowable during optimization had a direct impact on the number of monitor units calculated for each beam. Plans with the smallest minimum segment size (...Continue Reading

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Citations

Aug 5, 2014·Medical Physics·David WiantBenjamin J Sintay
May 9, 2013·Journal of Applied Clinical Medical Physics·Mian XiMeng-Zhong Liu
Feb 28, 2017·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)·Marco SchwarzLivia Marrazzo
Nov 29, 2016·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)·Antonella Fogliata, Luca Cozzi
Feb 27, 2020·Journal of Applied Clinical Medical Physics·Ara N AlexandrianSotirios Stathakis
Feb 28, 2013·Physics in Medicine and Biology·Yan Jiang GravesSteve B Jiang
Aug 29, 2019·Medical Physics·Stephen A GravesDaniel E Hyer
Sep 7, 2012·Physics in Medicine and Biology·Jeremiah WalaDavid Craft
Dec 25, 2015·Journal of Applied Clinical Medical Physics·Zhilei Liu ShenToufik Djemil

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Methods Mentioned

BETA
X‐ray

Software Mentioned

EGSnrc
MATLAB
MCSIM
Pinnacle
BEAMnrc
EGS4
RITv5

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