Premium
Po‐Poster ‐ 23: The geometrical accuracy of 3D reconstructions from orthogonal views using distortion corrected image intensifier images
Author(s) -
Diamond K,
Farrell T
Publication year - 2005
Publication title -
medical physics
Language(s) - English
Resource type - Journals
SCImago Journal Rank - 1.473
H-Index - 180
eISSN - 2473-4209
pISSN - 0094-2405
DOI - 10.1118/1.2031002
Subject(s) - image intensifier , computer vision , artificial intelligence , fiducial marker , distortion (music) , computer science , object (grammar) , process (computing) , iterative reconstruction , medical imaging , orientation (vector space) , computed radiography , nuclear medicine , image (mathematics) , computer graphics (images) , optics , mathematics , physics , image quality , medicine , geometry , amplifier , computer network , bandwidth (computing) , operating system
Three‐dimensional source localization in brachytherapy is integral to the treatment planning process. Many high dose rate (HDR) brachytherapy facilities employ a mobile C‐arm to accomplish this task. Digital images captured directly from an image intensifier are distorted and must be dewarped prior to their use in treatment planning. This preliminary study examines the accuracy of 3D reconstructions of a known object using digital images that have had the distortion removed using a simple mathematical model. Orthogonal images of a known test object were acquired and corrected, and were then used to reconstruct the object. The cumulative uncertainty in the reconstructed location of fiducial marks on the object over 18 cm length orientation was 1.2 mm, compared to 1.0 mm over a 16 cm length using CR film. Potential improvements to image processing methods employed in this study are also discussed.