Diode Dosimetric Characterisations And Assessments For In-Vivo Dosimetry In Radiotherapy Treatment

Diode is a kind of radiation dosimetry system that has been applied widely in radiotherapy treatment and very useful for in-vivo dosimetry (IVD). It is duly important to understand the characteristic of detector before it can be used in clinical treatment. In this study, characteristics of three...

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Main Author: Marzuki, Rahmatfadli
Format: Thesis
Language:English
Published: 2019
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Online Access:http://eprints.usm.my/48597/1/P-ZM0016-16R_Rahmatfadli%20bin%20Marzuki%20cut.pdf
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spelling my-usm-ep.485972021-03-11T03:18:24Z Diode Dosimetric Characterisations And Assessments For In-Vivo Dosimetry In Radiotherapy Treatment 2019-03 Marzuki, Rahmatfadli QC1 Physics (General) Diode is a kind of radiation dosimetry system that has been applied widely in radiotherapy treatment and very useful for in-vivo dosimetry (IVD). It is duly important to understand the characteristic of detector before it can be used in clinical treatment. In this study, characteristics of three (3) diodes IBA EDP-153G model were analyzed and compared to calibrated ionization chamber. The 6 MV linear accelerator (Linac) was used with different field sizes (FS), source to surface distance (SSD), linac monitor unit (MU), tray field (TF) wedge field (WF) and diode reading behind cerroband. Actual diode thickness, diode reproducibility, perturbation effect and diode effect with radiation beam angle and temperature were performed. From the determination of diode dosimetric characteristic, a clinical computerized treatment planning system (TPS) model Elekta Monaco and calibrated ionization chamber were used to verify the accuracy of diode reading in different treatment techniques. In this study, EDP-153G diode was sensitive with angle of incidence, wedge, SSD and temperature. The measured angle for diode were less than 2 % at angle ± 41°, ± 37° and ± 72° for diode 1, diode 2 and diode 3 respectively. SSD correction factors have increased proportionally by increasing the SSD. SSD correction factor from SSD 75 cm to 140 cm 0.995 to 1.025, 0.975 to 1.046 and 0.989 to 1.021 for diode 1, diode 2 and diode 3 respectively. Wedge correction factors have increased proportionally by increasing the wedge angle Diode wedge correction factor resulted in the range of 1.003 to 1.023, 1.009 to 1.033 and 1.011 to 1.056 for diode 1, diode 2 and diode 3 respectively. 2019-03 Thesis http://eprints.usm.my/48597/ http://eprints.usm.my/48597/1/P-ZM0016-16R_Rahmatfadli%20bin%20Marzuki%20cut.pdf application/pdf en public masters Universiti Sains Malaysia Pusat Pengajian Sains Fizik
institution Universiti Sains Malaysia
collection USM Institutional Repository
language English
topic QC1 Physics (General)
spellingShingle QC1 Physics (General)
Marzuki, Rahmatfadli
Diode Dosimetric Characterisations And Assessments For In-Vivo Dosimetry In Radiotherapy Treatment
description Diode is a kind of radiation dosimetry system that has been applied widely in radiotherapy treatment and very useful for in-vivo dosimetry (IVD). It is duly important to understand the characteristic of detector before it can be used in clinical treatment. In this study, characteristics of three (3) diodes IBA EDP-153G model were analyzed and compared to calibrated ionization chamber. The 6 MV linear accelerator (Linac) was used with different field sizes (FS), source to surface distance (SSD), linac monitor unit (MU), tray field (TF) wedge field (WF) and diode reading behind cerroband. Actual diode thickness, diode reproducibility, perturbation effect and diode effect with radiation beam angle and temperature were performed. From the determination of diode dosimetric characteristic, a clinical computerized treatment planning system (TPS) model Elekta Monaco and calibrated ionization chamber were used to verify the accuracy of diode reading in different treatment techniques. In this study, EDP-153G diode was sensitive with angle of incidence, wedge, SSD and temperature. The measured angle for diode were less than 2 % at angle ± 41°, ± 37° and ± 72° for diode 1, diode 2 and diode 3 respectively. SSD correction factors have increased proportionally by increasing the SSD. SSD correction factor from SSD 75 cm to 140 cm 0.995 to 1.025, 0.975 to 1.046 and 0.989 to 1.021 for diode 1, diode 2 and diode 3 respectively. Wedge correction factors have increased proportionally by increasing the wedge angle Diode wedge correction factor resulted in the range of 1.003 to 1.023, 1.009 to 1.033 and 1.011 to 1.056 for diode 1, diode 2 and diode 3 respectively.
format Thesis
qualification_level Master's degree
author Marzuki, Rahmatfadli
author_facet Marzuki, Rahmatfadli
author_sort Marzuki, Rahmatfadli
title Diode Dosimetric Characterisations And Assessments For In-Vivo Dosimetry In Radiotherapy Treatment
title_short Diode Dosimetric Characterisations And Assessments For In-Vivo Dosimetry In Radiotherapy Treatment
title_full Diode Dosimetric Characterisations And Assessments For In-Vivo Dosimetry In Radiotherapy Treatment
title_fullStr Diode Dosimetric Characterisations And Assessments For In-Vivo Dosimetry In Radiotherapy Treatment
title_full_unstemmed Diode Dosimetric Characterisations And Assessments For In-Vivo Dosimetry In Radiotherapy Treatment
title_sort diode dosimetric characterisations and assessments for in-vivo dosimetry in radiotherapy treatment
granting_institution Universiti Sains Malaysia
granting_department Pusat Pengajian Sains Fizik
publishDate 2019
url http://eprints.usm.my/48597/1/P-ZM0016-16R_Rahmatfadli%20bin%20Marzuki%20cut.pdf
_version_ 1747821951849594880