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International Journal of Computer Assisted Radiology and Surgery

Erschienen in:

06.04.2017 | Original Article

Contact-less stylus for surgical navigation: registration without digitization

verfasst von: Elvis C. S. Chen, Burton Ma, Terry M. Peters

Erschienen in: International Journal of Computer Assisted Radiology and Surgery | Ausgabe 7/2017

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Abstract

Purpose

We present a laser-based, contact-less, stylus for the purpose of fiducial registration and digitization in the context of surgical navigation.

Methods

We augmented a laser pointer with a spatial measurement device and used the laser beam as a means to locate a fiducial in 3D space. We developed a method for calibrating the orientation of the laser beam with respect to its attached tracking target. Digitization of a fiducial was formulated as a line intersection problem, and registration was formulated as a point-to-line registration problem.

Results

We achieved an RMS fiducial localization error of 0.63 mm for 151 measurements of 12 fiducial markers. Mean TRE values of less than 1.5 mm over the entire surface of a lumbar vertebra were achievable using 4 fiducial markers. We found that contact-based rigid registration performed carefully under near-ideal conditions outperforms contact-less registration in terms of TRE.

Conclusion

An inexpensive contact-less stylus can be used to obtain accurate fiducial registration, which can be performed without explicit fiducial digitization.

Vorheriger Artikel Pose-aware C-arm for automatic re-initialization of interventional 2D/3D image registration

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Titel: Contact-less stylus for surgical navigation: registration without digitization
verfasst von: Elvis C. S. Chen
Burton Ma
Terry M. Peters
Publikationsdatum: 06.04.2017
Verlag: Springer International Publishing
Erschienen in: International Journal of Computer Assisted Radiology and Surgery / Ausgabe 7/2017
Print ISSN: 1861-6410
Elektronische ISSN: 1861-6429
DOI: https://doi.org/10.1007/s11548-017-1576-7

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Abstract

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