Automatic detection of fiducial markers in fluoroscopy images for on-line calibration

TitleAutomatic detection of fiducial markers in fluoroscopy images for on-line calibration
Publication TypeJournal Article
Year of Publication2005
AuthorsSmith, L., M. Pleasance, R. Seeton, N. Archip, and R. Rohling
JournalMedical Physics
Volume32
Pagination1521-1523
Date PublishedJUN
Type of ArticleArticle
ISSN0094-2405
KeywordsC-arm fluoroscopy, calibration, fiducial markers
Abstract

Calibrated C-arm fluoroscopy is used for a variety of medical procedures where objects and anatomical structures need to be located in space. Calibration is often based on imaging a grid of fiducial markers and using the C-arm image's geometrical measurements (radius and center) together with the positions of the markers. An on-line technique is developed to automatically locate the fiducial markers and validated on 97 images. The success rate of the detection algorithm is 96.28% with an average error of 0.46 mm and a standard deviation of 0.32 mm. (c) 2005 American Association of Physicists in Medicine.

URLhttp://dx.doi.org/10.1118/1.1914547%7D
DOI10.1118/1.1914547

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