Image-guided interventions using intraoperative three-dimensional (3D) imaging can be
less cumbersome than systems dependent on preoperative images, especially by needing
neither image-to-patient registration nor a lengthy process of segmenting and generating
a 3D model. In this dissertation, a method for computer-assisted surgery using direct
navigation on intraoperative images is presented. In this system the registration step of
a navigated procedure was divided into two stages: preoperative calibration of images to
a ceiling-mounted optical tracking system, and intraoperative tracking during acquisition
of the 3D image. The preoperative stage used a custom-made multi-modal calibrator that
could be optically tracked and also contained fiducial spheres for radiological detection; a
robust registration algorithm was used to compensate for the high false-detection rate that
arose from the optical light-emitting diodes. Intraoperatively, a tracking device was at-
tached to bone models that were also instrumented with radio-opaque spheres; a calibrated
pointer was used to contact the latter spheres as a validation. The fiducial registration error
of the calibration stage was approximately 0.1 mm with the Innova 3D X-ray fluoroscope
and 0.7 mm with the mobile-gantry CT scanner. The target registration error in the valida-
tion stage was approximately 1.2 mm with the Innova 3D X-ray fluoroscope and 1.8 mm
with the mobile-gantry CT scanner. These findings suggest that direct registration can be a
highly accurate means of performing image-guided interventions in a fast, simple manner. / Thesis (Master, Computing) -- Queen's University, 2009-08-17 11:14:03.275
| Identifer | oai:union.ndltd.org:LACETR/oai:collectionscanada.gc.ca:OKQ.1974/2603 |
| Date | 17 August 2009 |
| Creators | Oentoro, Anton |
| Contributors | Queen's University (Kingston, Ont.). Theses (Queen's University (Kingston, Ont.)) |
| Source Sets | Library and Archives Canada ETDs Repository / Centre d'archives des thèses électroniques de Bibliothèque et Archives Canada |
| Language | English, English |
| Detected Language | English |
| Type | Thesis |
| Format | 3188530 bytes, application/pdf |
| Rights | This publication is made available by the authority of the copyright owner solely for the purpose of private study and research and may not be copied or reproduced except as permitted by the copyright laws without written authority from the copyright owner. |
| Relation | Canadian theses |
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