A simulation study of BrachyShade, a shadow-based internal source tracking system for HDR prostate brachytherapy

Alabd, R; Safavi-Naeini, M; Wilson, KJ; Rosenfeld, AB; Franklin, DR

A simulation study of BrachyShade, a shadow-based internal source tracking system for HDR prostate brachytherapy

Alabd, R

Safavi-Naeini, M Wilson, KJ Rosenfeld, AB Franklin, DR

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Publication Type:: Journal Article
Citation:: Physics in Medicine and Biology, 2018, 63 (20)
Issue Date:: 2018-10-18

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Field	Value	Language
dc.contributor.author	Alabd, R https://orcid.org/0000-0003-1858-9346	en_US
dc.contributor.author	Safavi-Naeini, M	en_US
dc.contributor.author	Wilson, KJ	en_US
dc.contributor.author	Rosenfeld, AB	en_US
dc.contributor.author	Franklin, DR https://orcid.org/0000-0002-9563-5943	en_US
dc.date.available	2020-05-25T19:13:17Z
dc.date.issued	2018-10-18	en_US
dc.identifier.citation	Physics in Medicine and Biology, 2018, 63 (20)	en_US
dc.identifier.issn	0031-9155	en_US
dc.identifier.uri	http://hdl.handle.net/10453/129521
dc.description.abstract	© 2018 Commonwealth of Australia. Department of Education and Training, and Department of Industry, Innovation and Science.. This paper presents a simulation study of BrachyShade, a proposed internal source-tracking system for real time quality assurance in high dose rate prostate brachytherapy. BrachyShade consists of a set of spherical tungsten occluders located above a pixellated silicon photodetector. The source location is estimated by minimising the mean squared error between a parametric model of the shadow image and acquired images of the shadows projected on the detector plane. A novel algorithm is finally employed to correct the systemic error resulting from Compton scattering in the medium. The worst-case error obtained with BrachyShade for a 13.5 ms image acquisition is less than 1.3 mm in the most distant part of the treatment volume, while for 75% of source locations an error of less than 0.42 mm was achieved.	en_US
dc.relation.ispartof	Physics in Medicine and Biology	en_US
dc.relation.isbasedon	10.1088/1361-6560/aae33d	en_US
dc.rights	info:eu-repo/semantics/openAccess
dc.subject.classification	Nuclear Medicine & Medical Imaging	en_US
dc.subject.mesh	Humans	en_US
dc.subject.mesh	Prostatic Neoplasms	en_US
dc.subject.mesh	Brachytherapy	en_US
dc.subject.mesh	Radiotherapy Dosage	en_US
dc.subject.mesh	Algorithms	en_US
dc.subject.mesh	Models, Theoretical	en_US
dc.subject.mesh	Quality Control	en_US
dc.subject.mesh	Male	en_US
dc.title	A simulation study of BrachyShade, a shadow-based internal source tracking system for HDR prostate brachytherapy	en_US
dc.type	Journal Article
utslib.citation.volume	20	en_US
utslib.citation.volume	63	en_US
utslib.for	0299 Other Physical Sciences	en_US
utslib.for	0903 Biomedical Engineering	en_US
utslib.for	1103 Clinical Sciences	en_US
pubs.embargo.period	Not known	en_US
pubs.organisational-group	/University of Technology Sydney
pubs.organisational-group	/University of Technology Sydney/Faculty of Engineering and Information Technology
pubs.organisational-group	/University of Technology Sydney/Faculty of Engineering and Information Technology/School of Electrical and Data Engineering
pubs.organisational-group	/University of Technology Sydney/Strength - CRIN - Realtime Information Networks
pubs.organisational-group	/University of Technology Sydney/Students
utslib.copyright.status	open_access	*
pubs.issue	20	en_US
pubs.publication-status	Published	en_US
pubs.volume	63	en_US

Abstract:

© 2018 Commonwealth of Australia. Department of Education and Training, and Department of Industry, Innovation and Science.. This paper presents a simulation study of BrachyShade, a proposed internal source-tracking system for real time quality assurance in high dose rate prostate brachytherapy. BrachyShade consists of a set of spherical tungsten occluders located above a pixellated silicon photodetector. The source location is estimated by minimising the mean squared error between a parametric model of the shadow image and acquired images of the shadows projected on the detector plane. A novel algorithm is finally employed to correct the systemic error resulting from Compton scattering in the medium. The worst-case error obtained with BrachyShade for a 13.5 ms image acquisition is less than 1.3 mm in the most distant part of the treatment volume, while for 75% of source locations an error of less than 0.42 mm was achieved.

Please use this identifier to cite or link to this item:

http://hdl.handle.net/10453/129521