Optimisation Of Quality Assurance Programme (Qap) For Image-Guided Adaptive Radiotherapy (Igart)

Image-guided adaptive radiotherapy (IGART) is an advanced radiotherapy treatment technique that involves treatment plan modifications during the treatment course to account for temporal changes in tumour volume. The purpose of this study is to develop a Quality Assurance Programme (QAP) for a linac...

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Main Author:	Sakaria, Kasmayanti
Format:	Thesis
Language:	English
Published:	2019
Subjects:	RK1-715 Dentistry
Online Access:	http://eprints.usm.my/48594/1/MScThesis_KasmayantiSakaria_March2019%2024.pdf
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id	my-usm-ep.48594
record_format	uketd_dc
spelling	my-usm-ep.485942021-03-11T02:24:50Z Optimisation Of Quality Assurance Programme (Qap) For Image-Guided Adaptive Radiotherapy (Igart) 2019-03 Sakaria, Kasmayanti RK1-715 Dentistry Image-guided adaptive radiotherapy (IGART) is an advanced radiotherapy treatment technique that involves treatment plan modifications during the treatment course to account for temporal changes in tumour volume. The purpose of this study is to develop a Quality Assurance Programme (QAP) for a linac that is optimised for IGART. The linac investigated in this study is an Elekta Synergy linac with 80 pairs of multileaf collimators (MLC) and cone beam computed tomography (CBCT) image guidance system. An optimised QAP was developed to assess relevant linac performance parameters including dose output delivery, dynamic MLC and CBCT image guidance system. Linac dose output was measured daily using a cross-calibrated detector, Quickcheck. The parameters evaluated were central dose output, beam flatness, beam symmetry and beam quality for a period of 19 months. The variations of measurement were within the tolerance level. The central dose outputs are within ± 2%, the beam flatness results are within ± 1.5%, the beam symmetry results are within ± 3% and the beam quality results are within ± 3%. The dynamic MLC performance was analysed weekly in term of leaf positional accuracy using Elekta’s propriety MLC tracking system that is verified against EPID measurement. The MLC position errors tracked were between -0.30 mm to 0.80 mm, within the range of the results from EPID. The performance of CBCT image guidance system was assessed monthly in term of image quality and CT number accuracy using smaller sized CIRS 062QA and compared against the more commonly used Catphan 600. The interphantom variations were observed in the measured parameters, yet they have similar trend to each other. 2019-03 Thesis http://eprints.usm.my/48594/ http://eprints.usm.my/48594/1/MScThesis_KasmayantiSakaria_March2019%2024.pdf application/pdf en public masters Universiti Sains Malaysia Institut Perubatan & Pergigian Termaju
institution	Universiti Sains Malaysia
collection	USM Institutional Repository
language	English
topic	RK1-715 Dentistry
spellingShingle	RK1-715 Dentistry Sakaria, Kasmayanti Optimisation Of Quality Assurance Programme (Qap) For Image-Guided Adaptive Radiotherapy (Igart)
description	Image-guided adaptive radiotherapy (IGART) is an advanced radiotherapy treatment technique that involves treatment plan modifications during the treatment course to account for temporal changes in tumour volume. The purpose of this study is to develop a Quality Assurance Programme (QAP) for a linac that is optimised for IGART. The linac investigated in this study is an Elekta Synergy linac with 80 pairs of multileaf collimators (MLC) and cone beam computed tomography (CBCT) image guidance system. An optimised QAP was developed to assess relevant linac performance parameters including dose output delivery, dynamic MLC and CBCT image guidance system. Linac dose output was measured daily using a cross-calibrated detector, Quickcheck. The parameters evaluated were central dose output, beam flatness, beam symmetry and beam quality for a period of 19 months. The variations of measurement were within the tolerance level. The central dose outputs are within ± 2%, the beam flatness results are within ± 1.5%, the beam symmetry results are within ± 3% and the beam quality results are within ± 3%. The dynamic MLC performance was analysed weekly in term of leaf positional accuracy using Elekta’s propriety MLC tracking system that is verified against EPID measurement. The MLC position errors tracked were between -0.30 mm to 0.80 mm, within the range of the results from EPID. The performance of CBCT image guidance system was assessed monthly in term of image quality and CT number accuracy using smaller sized CIRS 062QA and compared against the more commonly used Catphan 600. The interphantom variations were observed in the measured parameters, yet they have similar trend to each other.
format	Thesis
qualification_level	Master's degree
author	Sakaria, Kasmayanti
author_facet	Sakaria, Kasmayanti
author_sort	Sakaria, Kasmayanti
title	Optimisation Of Quality Assurance Programme (Qap) For Image-Guided Adaptive Radiotherapy (Igart)
title_short	Optimisation Of Quality Assurance Programme (Qap) For Image-Guided Adaptive Radiotherapy (Igart)
title_full	Optimisation Of Quality Assurance Programme (Qap) For Image-Guided Adaptive Radiotherapy (Igart)
title_fullStr	Optimisation Of Quality Assurance Programme (Qap) For Image-Guided Adaptive Radiotherapy (Igart)
title_full_unstemmed	Optimisation Of Quality Assurance Programme (Qap) For Image-Guided Adaptive Radiotherapy (Igart)
title_sort	optimisation of quality assurance programme (qap) for image-guided adaptive radiotherapy (igart)
granting_institution	Universiti Sains Malaysia
granting_department	Institut Perubatan & Pergigian Termaju
publishDate	2019
url	http://eprints.usm.my/48594/1/MScThesis_KasmayantiSakaria_March2019%2024.pdf
_version_	1747821951120834560

Optimisation Of Quality Assurance Programme (Qap) For Image-Guided Adaptive Radiotherapy (Igart)

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