Investigation of the mechanical performance of Siemens linacs components during arc: gantry, MLC, and electronic portal imaging device

Pejman Rowshanfarzad,1 Peter Häring,2 Hans L Riis,3 Sune J Zimmermann,3 Martin A Ebert1,4 1School of Physics, The University of Western Australia, Crawley, WA, Australia; 2German Cancer Research Center (DKFZ), Medical Physics in Radiation Oncology, Heidelberg, Germany; 3Radiofysisk Laborato...

Descripción completa

Guardado en:

Detalles Bibliográficos
Autores principales:	Rowshanfarzad P, Häring P, Riis HL, Zimmermann SJ, Ebert MA
Formato:	article
Lenguaje:	EN
Publicado:	Dove Medical Press 2015
Materias:	Medical technology R855-855.5
Acceso en línea:	https://doaj.org/article/8b0904b485524437b212ebe7ffa16c38
Etiquetas:	Agregar Etiqueta Sin Etiquetas, Sea el primero en etiquetar este registro!

id	oai:doaj.org-article:8b0904b485524437b212ebe7ffa16c38
record_format	dspace
spelling	oai:doaj.org-article:8b0904b485524437b212ebe7ffa16c382021-12-02T03:48:02ZInvestigation of the mechanical performance of Siemens linacs components during arc: gantry, MLC, and electronic portal imaging device1179-1470https://doaj.org/article/8b0904b485524437b212ebe7ffa16c382015-11-01T00:00:00Zhttps://www.dovepress.com/investigation-of-the-mechanical-performance-of-siemens-linacs-componen-peer-reviewed-article-MDERhttps://doaj.org/toc/1179-1470Pejman Rowshanfarzad,1 Peter Häring,2 Hans L Riis,3 Sune J Zimmermann,3 Martin A Ebert1,4 1School of Physics, The University of Western Australia, Crawley, WA, Australia; 2German Cancer Research Center (DKFZ), Medical Physics in Radiation Oncology, Heidelberg, Germany; 3Radiofysisk Laboratorium, Odense University Hospital, Odense C, Denmark; 4Department of Radiation Oncology, Sir Charles Gairdner Hospital, Nedlands, WA, Australia Background: In radiotherapy treatments, it is crucial to monitor the performance of linac components including gantry, collimation system, and electronic portal imaging device (EPID) during arc deliveries. In this study, a simple EPID-based measurement method is suggested in conjunction with an algorithm to investigate the stability of these systems at various gantry angles with the aim of evaluating machine-related errors in treatments. Methods: The EPID sag, gantry sag, changes in source-to-detector distance (SDD), EPID and collimator skewness, EPID tilt, and the sag in leaf bank assembly due to linac rotation were separately investigated by acquisition of 37 EPID images of a simple phantom with five ball bearings at various gantry angles. A fast and robust software package was developed for automated analysis of image data. Three Siemens linacs were investigated. Results: The average EPID sag was within 1 mm for all tested linacs. Two machines showed >1 mm gantry sag. Changes in the SDD values were within 7.5 mm. EPID skewness and tilt values were <1° in all machines. The maximum sag in leaf bank assembly was <1 mm. Conclusion: The method and software developed in this study provide a simple tool for effective investigation of the behavior of Siemens linac components with gantry rotation. Such a comprehensive study has been performed for the first time on Siemens machines. Keywords: linac, Siemens, arc, sag, EPID, gantryRowshanfarzad PHäring PRiis HLZimmermann SJEbert MADove Medical PressarticleMedical technologyR855-855.5ENMedical Devices: Evidence and Research, Vol 2015, Iss default, Pp 457-466 (2015)
institution	DOAJ
collection	DOAJ
language	EN
topic	Medical technology R855-855.5
spellingShingle	Medical technology R855-855.5 Rowshanfarzad P Häring P Riis HL Zimmermann SJ Ebert MA Investigation of the mechanical performance of Siemens linacs components during arc: gantry, MLC, and electronic portal imaging device
description	Pejman Rowshanfarzad,1 Peter Häring,2 Hans L Riis,3 Sune J Zimmermann,3 Martin A Ebert1,4 1School of Physics, The University of Western Australia, Crawley, WA, Australia; 2German Cancer Research Center (DKFZ), Medical Physics in Radiation Oncology, Heidelberg, Germany; 3Radiofysisk Laboratorium, Odense University Hospital, Odense C, Denmark; 4Department of Radiation Oncology, Sir Charles Gairdner Hospital, Nedlands, WA, Australia Background: In radiotherapy treatments, it is crucial to monitor the performance of linac components including gantry, collimation system, and electronic portal imaging device (EPID) during arc deliveries. In this study, a simple EPID-based measurement method is suggested in conjunction with an algorithm to investigate the stability of these systems at various gantry angles with the aim of evaluating machine-related errors in treatments. Methods: The EPID sag, gantry sag, changes in source-to-detector distance (SDD), EPID and collimator skewness, EPID tilt, and the sag in leaf bank assembly due to linac rotation were separately investigated by acquisition of 37 EPID images of a simple phantom with five ball bearings at various gantry angles. A fast and robust software package was developed for automated analysis of image data. Three Siemens linacs were investigated. Results: The average EPID sag was within 1 mm for all tested linacs. Two machines showed >1 mm gantry sag. Changes in the SDD values were within 7.5 mm. EPID skewness and tilt values were <1° in all machines. The maximum sag in leaf bank assembly was <1 mm. Conclusion: The method and software developed in this study provide a simple tool for effective investigation of the behavior of Siemens linac components with gantry rotation. Such a comprehensive study has been performed for the first time on Siemens machines. Keywords: linac, Siemens, arc, sag, EPID, gantry
format	article
author	Rowshanfarzad P Häring P Riis HL Zimmermann SJ Ebert MA
author_facet	Rowshanfarzad P Häring P Riis HL Zimmermann SJ Ebert MA
author_sort	Rowshanfarzad P
title	Investigation of the mechanical performance of Siemens linacs components during arc: gantry, MLC, and electronic portal imaging device
title_short	Investigation of the mechanical performance of Siemens linacs components during arc: gantry, MLC, and electronic portal imaging device
title_full	Investigation of the mechanical performance of Siemens linacs components during arc: gantry, MLC, and electronic portal imaging device
title_fullStr	Investigation of the mechanical performance of Siemens linacs components during arc: gantry, MLC, and electronic portal imaging device
title_full_unstemmed	Investigation of the mechanical performance of Siemens linacs components during arc: gantry, MLC, and electronic portal imaging device
title_sort	investigation of the mechanical performance of siemens linacs components during arc: gantry, mlc, and electronic portal imaging device
publisher	Dove Medical Press
publishDate	2015
url	https://doaj.org/article/8b0904b485524437b212ebe7ffa16c38
work_keys_str_mv	AT rowshanfarzadp investigationofthemechanicalperformanceofsiemenslinacscomponentsduringarcgantrymlcandelectronicportalimagingdevice AT haringp investigationofthemechanicalperformanceofsiemenslinacscomponentsduringarcgantrymlcandelectronicportalimagingdevice AT riishl investigationofthemechanicalperformanceofsiemenslinacscomponentsduringarcgantrymlcandelectronicportalimagingdevice AT zimmermannsj investigationofthemechanicalperformanceofsiemenslinacscomponentsduringarcgantrymlcandelectronicportalimagingdevice AT ebertma investigationofthemechanicalperformanceofsiemenslinacscomponentsduringarcgantrymlcandelectronicportalimagingdevice
_version_	1718401636785717248

Investigation of the mechanical performance of Siemens linacs components during arc: gantry, MLC, and electronic portal imaging device

Ejemplares similares