Evaluation of Calculation Algorithms for photon Beam dose in Heterogeneous Medium
Journal Title: JOURNAL OF ADVANCES IN PHYSICS - Year 0, Vol 9, Issue 2
Abstract
The success of the implementations of a radiotherapy treatment planning system is determined by the ability of the dose calculation algorithms to reproduce the algorithm input data, and in most cases the agreement was found within ±2%. Varian linear accelerator DMX, TPS Eclipse (version 10.33) is used and absolute dosimetry and relative dosimetry system (PTW, Freiburg, Germany) and 2D array were also used. The Calculation of Analytical Anisotropic Algorithm (AAA) is more accurate than the Pencil beam Algorithm (PBC) in heterogeneity medium in comparison with practical measurement. The extent of the effort required to carry out a validation study of the complexity of that described here precludes its use as a routine component of TPS commissioning. Our realistic recommendation is that commissioning includes tests aimed at confirming that raw beam data have been entered correctly and that the operation of the system is understood. Finally, the study tell us that the observed deviations between TPS calculated using Eclipse version 10.33 and measured dose in the present of heterogeneous medium are well within the tolerance levels and the study also show that the use of Eclipse (version 10.33) TPS, AAA algorithm records significant improvement than the previous TPS versions especially in the present of low density inhomogeneity.
Authors and Affiliations
G. S. Hassan, Saleh A. Mohamed, Khaled M. Elshahat
Keywords
Related Articles
- EP ID EP653743
- DOI 10.24297/jap.v9i2.1405
- Views 95
- Downloads 0
MicroVolt Variations of The Human Brain (Quantitative Electroencephalography) Display Differential Torque Effects During West-East versus North-South Orientation in the Geomagnetic Field
The human brain was assumed to be an elliptical electric dipole. Repeated quantitative electroencephalographic measurements over several weeks were completed for a single subject who sat in either a magnetic eastward or...
TEMPERATURE DEPENDENCE BEHAVIOR OF ELECTRICAL RESISTIVITY IN NOBLE METALS AT LOW TEMPERATURES
Resistivity temperature dependence and residual resistivity concentration-dependence in pure noble metals(Cu, Ag, Au) have been studied at low temperatures. Dominations of electron dislocation and impurity, electron-elec...
Influence of rapid solidification and lithium additions on microstructure and mechanical properties of aluminum based alloys
A series of aluminum-lithium or lightweight alloys containing up to 5 wt. % lithium was rapidly solidified from melt by chillblock melt-spun technique. The resultant ribbons were studied by X-ray diffraction (XRD), scann...
The study of humidity sensors having sandwich structure based on chalcogenide glasses
This article is devoted to the study of the influence of moisture in sandwich structure Al-As33.3Se33.3S33.4-Te, Al-As33.3Se33.3S33.4:Smx-Te (x=1 at%).It is clear from the analysis of schedules, after thermal annealing t...
Preparation, Characterization and Antibacterial Efficiency of Olive Leaves Extract and Chitosan-Silver Nanoparticles using Electrochemical Method
The present work involves the improvement of chitosan-olive leaves extract and silver nanoparticles (Cs-OLE-AgNPs) using electrochemical approach followed by UV-irradiation reduction. The formation of silver nanoparticle...