Distributions dose analysis for 6 MV photon beams using Monte Carlo-GEANT4 simulation

Qomariyah, Nurul; Wirawan, Rahadi; Mardiana, Laili; Hadi, Kasnawi Al

doi:10.1063/1.5132656

Cited by 3 publications

(4 citation statements)

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“…Hal ini dapat dilihat baik dari arah inline maupun crossline, dimana pada arah inline penumbranya dibawah 15 mm sedangkan pada arah crossline penumbranya di bawah 16 mm. Adanya penumbra terjadi karena pembatasan set up lapangan paparan oleh rahang kolimator [5]. Pada pengukuran dose profile ini digunakan kedalaman referensi 0,6 cm untuk energi 4 MeV, 1 cm untuk energi 6 MeV, 1,4 cm untuk energi 9 MeV, 2 cm untuk energi 12 MeV dan 2,6 cm untuk energi 15 MeV seperti yang terlihat pada Tabel 2.…”

Section: Pengukuran Dose Profileunclassified

“…Quality control berkas dilakukan melalui pengukuran Percentage Depth Dose (PDD) dan profil dosis (Dose Profile) [3][4]. PDD memberikan informasi tentang kualitas berkas agar pemberian dosis dapat optimal pada lapangan dan kedalaman yang diinginkan, sementara Dose Profile memberikan informasi kualitas berkas untuk distribusi dosis arah lateral [5]. Kestabilan profil berkas pada pesawat LINAC dapat diamati melalui dua parameter yaitu flatness dan symmetry.…”

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“…Parameter-parameter yang perlu diperhatikan dalam pengukuran PDD yaitu kedalaman, luas lapangan penyinaran, jarak sumber ke permukaan (SSD) dan energi berkas radiasi [5]. Milvita (2018) menganalisis hubungan nilai PDD terhadap variasi kedalaman target dan luas lapangan penyinaran menggunakan Pesawat Linac-CX.…”

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Analisa Kurva PDD Dan Profile Dose Berkas Elektron Pesawat Linac Varian Clinac Cx

Hasanah¹,

Qomariyah

Makmur³

et al. 2020

IPR

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Linac (linear Accelerator) is a radiotherapy device that utilizes high energy radiation to kill cancer cells. Every radiotherapy equipment such as Linac must be calibrated periodically. One of them is monthly quality control which aims to test the performance of Linac so that the quality of the output of the radiation beam can be guaranteed. Quality control conducted covers measurement of Percentage Depth Dose (PDD) and Dose Profile. So that in this paper we will analyze the electron beam of Linac Therapeutic Clinics Variants plane of RSUD Provinsi NTB. In PDD measurements, the Linac Variant Clinac CX electron beam energy 4, 6, 9, 12, and 15 MeV planes are used in the radiation field size 15  15 cm 2 . Meanwhile, the dose profile was measured in the radiation fields 10  10 cm 2 and 25  25 cm 2 using blue phantom, (reference and field) detectors which are equipped with a computer control units (CCU) and carried out for crossline and inline directions at Dmax depth and certain depth with 100 cm SSD. The measurement results show that the greater the electron energy used, the maximum dose (Dmax) obtained is getting smaller, but the maximum dose depth increase. The measurement results are still within the tolerance range of ± 0.2. While the results of the Dose Profile measurements show a field size of 25  25 cm 2 more flatness and symmetry than a 10  10 cm 2 field both for inline and crossline directions and still within measurement tolerances limit 4.5% - 7% for flatness and  2 % for symmetry.

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Section: Pengukuran Dose Profileunclassified

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Analisa Kurva PDD Dan Profile Dose Berkas Elektron Pesawat Linac Varian Clinac Cx

Hasanah¹,

Qomariyah

Makmur³

et al. 2020

IPR

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“…The main motivation of this work is related to there are few research papers about the use of MCS to determine energy spectra of electron beams[ 21 31 37 38 ] and its characteristic dosimetric parameters in comparison to those existent for photon beam,[ 11 31 33 39 40 41 42 43 44 45 46 ] especially for linear accelerators still used in developing countries. Thus, in this work, an Elekta Synergy Platform linear accelerator was used as a reference, since the Synergy is still one of the most used accelerators in the Latin-American market and other developing regions of the world.…”

Section: Introductionmentioning

confidence: 99%

Monte carlo calculation of the energy spectrum of a 6 MeV electron beam using penetration and energy loss of positrons and electrons code

et al. 2020

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Background: The limited bibliographic existence of research works on the use of Monte Carlo simulation to determine the energy spectra of electron beams compared to the information available regarding photon beams is a scientific task that should be resolved. Aims: In this work, Monte Carlo simulation was performed through the PENELOPE code of the Sinergy Elekta accelerator head to obtain the spectrum of a 6 MeV electron beam and its characteristic dosimetric parameters. Materials and Methods: The central-axis energy spectrum and the percentage depth dose curve of a 6 MeV electron beam of an Elekta Synergy linear accelerator were obtained by using Monte Carlo PENELOPE code v2014. For this, the linear accelerator head geometry, electron applicators, and water phantom were simplified. Subsequently, the interaction process between the electron beam and head components was simulated in a time of 86.4x10 4 s. Results: From this simulation, the energy spectrum at the linear accelerator exit window and the surface of the phantom was obtained, as well as the associated percentage depth dose curves. The validation of the Monte Carlo simulation was performed by comparing the simulated and the measured percentage depth dose curves via the gamma index criterion. Measured percentage depth- dose was determined by using a Markus electron ionization chamber, type T23343. Characteristic parameters of the beam related with the PDD curves such as the maximum dose depth (R 100 ), 90% dose depth (R 90 ), 90% dose depth or therapeutic range (R 85 ), half dose depth (R 50 ), practical range (R p ), maximum range (R max ), surface dose (D s ), normalized dose gradient (G 0 ) and photon contamination dose (D x ) were determined. Parameters related with the energy spectrum, namely, the most probable energy of electrons at the surface (E p,0 ) and electron average energy ( E – 0 ) were also determined. Conclusion: It was demonstrated that PENELOPE is an attractive and accurate tool for the obtaining of dosimetric parameters of a medical linear accelerator since it can reliably reproduce important clinical data such as the energy spectrum, depth dose, and dose profile.

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Radiation shielding potential analyze of iron sand-pumice composite based on GEANT4 simulations

Wirawan¹,

Qomariyah²,

Ardianto³

et al. 2023

Computational Intelligence and Network Security

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Distributions dose analysis for 6 MV photon beams using Monte Carlo-GEANT4 simulation

Cited by 3 publications

References 9 publications

Analisa Kurva PDD Dan Profile Dose Berkas Elektron Pesawat Linac Varian Clinac Cx

Analisa Kurva PDD Dan Profile Dose Berkas Elektron Pesawat Linac Varian Clinac Cx

Monte carlo calculation of the energy spectrum of a 6 MeV electron beam using penetration and energy loss of positrons and electrons code

Radiation shielding potential analyze of iron sand-pumice composite based on GEANT4 simulations

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