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All Journal Jurnal Penelitian Fisika dan Aplikasinya (JPFA) Physics Student Journal Journal of Medical Physics and Biophysics Natural B Journal Of Vocational Health Studies
Firdy Yuana
Brawijaya University
Astronomy Earth & Planetary Sciences Education Environmental Science Health Professions Materials Science & Nanotechnology Medicine & Pharmacology Physics

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Journal : Natural B

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Monte Carlo Simulation to Determine Deposition Ratio of Dosage in a-SI Epid with Dose Deposition on Water Herwiningsih, Sri; Rianto, Sugeng; Yuana, Firdy
Natural B, Journal of Health and Environmental Sciences Vol 2, No 3 (2014)
Publisher : Natural B, Journal of Health and Environmental Sciences

Show Abstract | Download Original | Original Source | Check in Google Scholar | Full PDF (1094.941 KB) | DOI: 10.21776/ub.natural-b.2014.002.03.1

Abstract

The study aimed to explore the use of a-Si EPID as a dosimeter for IMRT delivery. The main objective of the study was to determine the ratio of dose deposited in a-Si EPID and the dose deposited in water. Linac used in the simulation was Electa Precise Linac and A-Si EPID model used in the study was based on the configuration of iView GT Elekta a-Si EPID. Study the characteristic of energy deposition at a-Si EPID and water detector shows that the energy deposition at a-Si EPID detector is higher than that of water detector at low photon energy (<0.1 MeV). This is caused by an enhancement of photoelectric interaction between photon beam and a-Si EPID detector at low energy X-rays. The simulation of dose deposition by using square fields show that the ratio between the dose deposition of a-Si EPID and the dose deposition of water detector (α) increases with an increase of the field size. The value of α ranges from 0.60 – 0.66. The similar result was shown in the simulation of dose deposition by using IMRT beam, in which the value of α ranges from 0.63 – 0.64. The α value is useful to relate the measured dose from detector to the equivalent dose of water, which is often used as a reference medium in radiotherapy dosimetry.  
Co-Authors Achmad Hidayat Alfian Khoiri Anto Anggita Khoirunnisa Arinto Yudi Arinto Yudi P Wardoyo Binti Faridhatus Sholihah Elmiar Isdityo Lolivianda Fatimah Kunti Hentihu Johan Andoyo Effendi Noor Muhammad Nurhuda Muhammad Rosyid Prima Noor Herfianto, Prima Noor Risalatul Latifah Sri Herwiningsih Sugeng Rianto Winda Suryaning Pramesti