Monte Carlo simulations of EBT3 film dose deposition for percentage depth dose (PDD) curve evaluation

Varian linac modeling has been carried out to obtain Percentage Depth Dose (PDD) and profiles using variations gantry angle 0o, 15o, 30o , 45o in the vertical axis of the surface, field size 10x10 cm2, photon beam 4 MV and Monte Carlo simulations. Percentage Depth Dose and profile illustrates dose distributions in a phantom water measuring 40x40x40 cm3, changes gantry is one of the factors that determine the distribution of the dose to the patient research shows changes in Dmax in the Percentage Depth Dose is affected by changes in the angle gantry resulted in the addition of the area build up so it can be used for therapy in the region and produce skin sparing effects that can be used to protect the skin from exposure to radiation. The graph result is profiles obtained show lack simetrisan in areas positive quadrant has a distribution of fewer doses than the quadrant of negative as well as the slope of the surface so that it can be used for some cases treatments that require a depth and a certain slope, dose calculations are more accurate and can minimize side effects.

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Behaviors of the percentage depth dose curves along the beam axis of a phantom filled with different clinical PTO objects, a Monte Carlo Geant4 study

Radiation Physics and Chemistry ◽

10.1016/j.radphyschem.2016.04.013 ◽

2016 ◽

Vol 125 ◽

pp. 199-204 ◽

Cited By ~ 1

Author(s):

Jaafar EL Bakkali ◽

Tarek EL Bardouni ◽

Seyedmostafa Safavi ◽

Maged Mohammed ◽

Mroan Saeed

Keyword(s):

Monte Carlo ◽

Beam Axis ◽

Percentage Depth Dose ◽

Depth Dose

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Monte Carlo simulations of dose deposition applied to clinical radiation therapy

Radiation Measurements ◽

10.1016/j.radmeas.2007.01.012 ◽

2006 ◽

Vol 41 ◽

pp. S36-S44 ◽

Cited By ~ 3

Author(s):

James E. Rodgers

Keyword(s):

Monte Carlo ◽

Radiation Therapy ◽

Monte Carlo Simulations ◽

Dose Deposition

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Percentage depth dose (PDD) and Beam profile measurements using CT based MAGAT gel dosimetry system and Monte Carlo calculation

New Trends and Issues Proceedings on Advances Pure and Applied Sciences ◽

10.18844/gjpaas.v0i7.3168 ◽

2016 ◽

pp. 102-107

Author(s):

Mohammad Aljamal

Keyword(s):

Monte Carlo Simulation ◽

Monte Carlo ◽

Beam Profile ◽

Field Size ◽

Profile Measurement ◽

Gel Dosimetry ◽

Percentage Depth Dose ◽

Depth Dose ◽

Dosimetry System ◽

Gel Phantom

Abstract The aim of this project is to develop and to evaluate the CT based MAGAT (methacrylic acid, gelatine and tetrakis phosphonium chloride) polymer gel dosimetry for measuring 3D dose distributions in radiation treatment. The MAGAT gel was prepared based on the formulation proposed in the literature. The percentage depth dose (PDD) and beam profile of 8 x 8 cm2 field size photon beam from a 6 MV linear accelerator were measured. Monte Carlo simulation was carried out to calculate PDD and beam profiles in the simulated MAGAT gel phantom to verify the data measured using MAGAT gel dosimetry for the 8 x 8 cm2 field size. The PDD and beam profile calculated using simulated MAGAT gel phantom agreed very well with that measured using MAGAT gel dosimetry. However, there were some differences between the simulated PDD with that measured at the surface region due to the electron contamination at the surface of the simulated phantom. In conclusion, the results showed that the CT based MAGAT gel dosimetry system is promising method to measure three- dimensional dose distribution based on PDD and Beam profile measurement. Keywords: MAGAT gel, CT, Monte Carlo simulation

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Analysis of Effect of Change Source to Surface Distance (SSD) and the Field Size to Distribution Dose Using Monte Carlo Method-EGSnrc

Indonesian Journal of Physics ◽

10.5614/itb.ijp.2019.30.1.3 ◽

2019 ◽

Vol 30 (1) ◽

pp. 14-17

Author(s):

Intan Dillia Nurhadi ◽

Ridwan Ramdani ◽

Freddy Haryanto ◽

Yudha Satya Perkasa ◽

Mada Sanjaya

Keyword(s):

Monte Carlo ◽

Modeling And Simulation ◽

Radiation Source ◽

Maximum Dose ◽

Size Variation ◽

Field Size ◽

Virtual Model ◽

Surface Distance ◽

Percentage Depth Dose ◽

Depth Dose

Research was conducted to analyze the effect of changes in the distance radiation source to the surface it is called the medium Source to Surface Distance (SSD) and wide exposure field (Field Size) on the distribution of the dose in linear air Accelerator (LINAC) using Monte Carlo - EGSnrc. Monte Carlo simulation is used for modeling and simulation head linac at BEAMnrc. Virtual model of the linac is made based on the data characteristics of the aircraft Linac Varian Clinac iX then its output obtained information characteristic photon beam using BEAMDP, while modeling and simulation phantom done on DOSXYZnrc with the size of the phantom is (40x40x40) cm3 , with the material in the form of water, using a beam of photons 6 MV, testing variation SSD at 80 cm, 90 cm, 100.1 cm, 110 cm, 120 cm and variation field size is (6x6) cm2, (10x10) cm2, (20x20) cm2 to obtain disribution of dosage form of curves Percentage Depth dose (PDD) and Profile dose. The results showed that the smaller distance radiation source to the surface of the medium (SSD) and the greater the broad field (field size), then increasing the dose distribution is obtained. In the SSD and Field Size variation, the radiation dose will continue to rise significantly from the surface of the medium 0 cm to a depth of maximum dose (Dmax), then the dose began to decline after passing the depth Dmax.

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FLUKA Monte Carlo for Basic Dosimetric Studies of Dual Energy Medical Linear Accelerator

Journal of Radiotherapy ◽

10.1155/2014/343979 ◽

2014 ◽

Vol 2014 ◽

pp. 1-7 ◽

Cited By ~ 1

Author(s):

K. Abdul Haneefa ◽

T. Siji Cyriac ◽

M. M. Musthafa ◽

R. Ganapathi Raman ◽

V. T. Hridya ◽

...

Keyword(s):

Monte Carlo ◽

Linear Accelerator ◽

Dual Energy ◽

General Purpose ◽

Experimental Measurements ◽

Monte Carlo Code ◽

Percentage Depth Dose ◽

Depth Dose ◽

Medical Linear Accelerator ◽

Cylindrical Ionization Chamber

General purpose Monte Carlo code for simulation of particle transport is used to study the basic dosimetric parameters like percentage depth dose and dose profiles and compared with the experimental measurements from commercial dual energy medical linear accelerator. Varian Clinac iX medical linear accelerator with dual energy photon beams (6 and 15 MV) is simulated using FLUKA. FLAIR is used to visualize and edit the geometry. Experimental measurements are taken for 100 cm source-to-surface (SSD) in 50 × 50 × 50 cm3 PTW water phantom using 0.12 cc cylindrical ionization chamber. Percentage depth dose for standard square field sizes and dose profiles for various depths are studied in detail. The analysis was carried out using ROOT (a DATA analysis frame work developed at CERN) system. Simulation result shows good agreement in percentage depth dose and beam profiles with the experimental measurements for Varian Clinac iX dual energy medical linear accelerator.

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Synchrotron X-ray Irradiation of a Rat’s Head Model: Monte Carlo Study of Chromatic Gel Dosimetry

Applied Sciences ◽

10.3390/app11167389 ◽

2021 ◽

Vol 11 (16) ◽

pp. 7389

Author(s):

Yarden Peleg Walg ◽

Yanai Krutman ◽

Amir Berman ◽

Itzhak Orion

Keyword(s):

Monte Carlo ◽

Brain Tumor ◽

Monte Carlo Simulations ◽

Treatment Planning ◽

Monte Carlo Study ◽

Head Model ◽

Gel Dosimetry ◽

Radiation Beam ◽

X Ray ◽

Depth Dose

Accurate treatment planning in radiotherapy essentially decreases damage to healthy tissue surrounding the tumor. Due to plans to use a direct, highly collimated, narrow beam with high intensity to treat small area tumors, researchers have studied microbeam radiation therapy extensively. Using a synchrotron beam as the radiation source may help to limit damage, but treatment planning using computerized simulations and dosimetry is still necessary to achieve optimal results. For this purpose, PDA-gel dosimeters were developed and their sensitivity around a 150 keV induced synchrotron X-ray radiation beam was examined via Monte Carlo simulations using the EGS5 code system. The microbeam development is now at the animal study stage. In this study, we simulate the irradiation of a rat’s brain. The simulation results obtained spectra for two types of PDA-gel dosimeters that were compared with the spectrum obtained in a modelized brain tumor of a rat. Additionally, percentage depth dose curves were calculated for the brain tissue and the two gels. Correction equations for the dosimeters were obtained from the dose-difference plots. For further references, these equations can be used to calculate the actual dose in a brain tumor in a rat. The Monte Carlo simulations demonstrate that PDA-gel dosimeters can be used for treatment planning using synchrotron irradiations.

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