Benchmarking of a motion sensing system for medical imaging and radiotherapy

Peter Barnes, Clive Baldock, Steven Meikle, Roger Fulton

Research output: Chapter in Book/Report/Conference proceedingConference proceeding contribution


We have tested the performance of an Optotrak Certus system, which optically tracks multiple markers, in both position and time. To do this, we have developed custom code which enables a range of testing protocols, and make this code available to the community. We find that the Certus' positional accuracy is very high, around 20μm at a distance of 2.8 m. In contrast, we find that its timing accuracy is typically no better than around 5-10% for typical data rates, whether one is using an ethernet connection or a dedicated SCSI link from the system to a host computer. However, with our code we are able to attach very accurate timestamps to the data frames, and in cases where regularly-spaced data are not an absolute requirement, this will be more than adequate.
Original languageEnglish
Title of host publicationIEEE Nuclear Science Symposium Conference Record
Subtitle of host publicationNSS/MIC 2007 : 27 October-3 November 2007, Honolulu, HI
EditorsBo Yu
Place of PublicationPiscataway, NJ
PublisherInstitute of Electrical and Electronics Engineers (IEEE)
Number of pages8
ISBN (Print)9781424409235
Publication statusPublished - 2007
Externally publishedYes
EventIEEE Nuclear Science Symposium and Medical Imaging Conference - Honolulu, HI
Duration: 27 Oct 20073 Nov 2007


ConferenceIEEE Nuclear Science Symposium and Medical Imaging Conference
CityHonolulu, HI

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