Show simple item record

dc.contributor.author
Fattori, Giovanni
dc.contributor.author
Safai, Sairos
dc.contributor.author
Fernández Carmona, Pablo
dc.contributor.author
Peroni, Marta
dc.contributor.author
Perrin, Rosalind
dc.contributor.author
Weber, Damien C.
dc.contributor.author
Lomax, Antony J.
dc.date.accessioned
2019-10-08T16:51:30Z
dc.date.available
2017-06-12T20:48:59Z
dc.date.available
2019-10-08T16:51:30Z
dc.date.issued
2017
dc.identifier.other
10.1186/s13014-017-0797-9
en_US
dc.identifier.uri
http://hdl.handle.net/20.500.11850/130345
dc.identifier.doi
10.3929/ethz-b-000130345
dc.description.abstract
Background Motion monitoring is essential when treating non-static tumours with pencil beam scanned protons. 4D medical imaging typically relies on the detected body surface displacement, considered as a surrogate of the patient's anatomical changes, a concept similarly applied by most motion mitigation techniques. In this study, we investigate benefits and pitfalls of optical and electromagnetic tracking, key technologies for non-invasive surface motion monitoring, in the specific environment of image-guided, gantry-based proton therapy. Methods Polaris SPECTRA optical tracking system and the Aurora V3 electromagnetic tracking system from Northern Digital Inc. (NDI, Waterloo, CA) have been compared both technically, by measuring tracking errors and system latencies under laboratory conditions, and clinically, by assessing their practicalities and sensitivities when used with imaging devices and PBS treatment gantries. Additionally, we investigated the impact of using different surrogate signals, from different systems, on the reconstructed 4D CT images. Results Even though in controlled laboratory conditions both technologies allow for the localization of static fiducials with sub-millimetre jitter and low latency (31.6 ± 1 msec worst case), significant dynamic and environmental distortions limit the potential of the electromagnetic approach in a clinical setting. The measurement error in case of close proximity to a CT scanner is up to 10.5 mm and precludes its use for the monitoring of respiratory motion during 4DCT acquisitions. Similarly, the motion of the treatment gantry distorts up to 22 mm the tracking result. Conclusions Despite the line of sight requirement, the optical solution offers the best potential, being the most robust against environmental factors and providing the highest spatial accuracy. The significant difference in the temporal location of the reconstructed phase points is used to speculate on the need to apply the same monitoring system for imaging and treatment to ensure the consistency of detected phases.
en_US
dc.format
application/pdf
en_US
dc.language.iso
en
en_US
dc.publisher
BioMed Central
en_US
dc.rights.uri
http://creativecommons.org/licenses/by/4.0/
dc.subject
Respiratory motion
en_US
dc.subject
Optical tracking
en_US
dc.subject
Electromagnetic tracking
en_US
dc.subject
Proton therapy
en_US
dc.subject
Gantry
en_US
dc.subject
CT imaging
en_US
dc.title
Monitoring of breathing motion in image-guided PBS proton therapy: comparative analysis of optical and electromagnetic technologies
en_US
dc.type
Journal Article
dc.rights.license
Creative Commons Attribution 4.0 International
dc.date.published
2017-03-31
ethz.journal.title
Radiation Oncology
ethz.journal.volume
12
en_US
ethz.pages.start
63
en_US
ethz.size
11 p.
en_US
ethz.version.deposit
publishedVersion
en_US
ethz.identifier.wos
ethz.identifier.scopus
ethz.publication.place
London
en_US
ethz.publication.status
published
en_US
ethz.date.deposited
2017-06-12T20:50:08Z
ethz.source
ECIT
ethz.identifier.importid
imp593655669d28444737
ethz.ecitpid
pub:193351
ethz.eth
yes
en_US
ethz.availability
Open access
en_US
ethz.rosetta.installDate
2017-07-12T15:00:26Z
ethz.rosetta.lastUpdated
2024-02-02T09:32:43Z
ethz.rosetta.versionExported
true
ethz.COinS
ctx_ver=Z39.88-2004&rft_val_fmt=info:ofi/fmt:kev:mtx:journal&rft.atitle=Monitoring%20of%20breathing%20motion%20in%20image-guided%20PBS%20proton%20therapy:%20comparative%20analysis%20of%20optical%20and%20electromagnetic%20technologies&rft.jtitle=Radiation%20Oncology&rft.date=2017&rft.volume=12&rft.spage=63&rft.au=Fattori,%20Giovanni&Safai,%20Sairos&Fern%C3%A1ndez%20Carmona,%20Pablo&Peroni,%20Marta&Perrin,%20Rosalind&rft.genre=article&rft_id=info:doi/10.1186/s13014-017-0797-9&
 Search print copy at ETH Library

Files in this item

Thumbnail

Publication type

Show simple item record