
Proceedings Paper
Overcoming nonlinear partial volume effects in known-component reconstruction of Cochlear implantsFormat | Member Price | Non-Member Price |
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Paper Abstract
Nonlinear partial volume (NLPV) effects can be significant for objects with large attenuation differences and fine detail
structures near the spatial resolution limits of a tomographic system. This is particularly true for small metal devices like
cochlear implants. While traditional model-based approaches might alleviate these artifacts through very fine sampling
of the image volume and subsampling of rays to each detector element, such solutions can be extremely burdensome in
terms of memory and computational requirements. The work presented in this paper leverages the model-based approach
called “known-component reconstruction” (KCR) where prior knowledge of a surgical device is integrated into the estimation.
In KCR, the parameterization of the object separates the volume into an unknown background anatomy and a
known component with unknown registration. Thus, one can model projections of an implant at very high spatial resolution
while limiting the spatial resolution of the anatomy - in effect, modeling NLPV effects where they are most significant.
We present modifications of the KCR approach that can be used to largely eliminate NLPV artifacts, and demonstrate
the efficacy of the modified technique (with improved image quality and accurate implant position estimates) for
the cochlear implant imaging scenario.
Paper Details
Date Published: 19 March 2013
PDF: 6 pages
Proc. SPIE 8668, Medical Imaging 2013: Physics of Medical Imaging, 86681L (19 March 2013); doi: 10.1117/12.2007945
Published in SPIE Proceedings Vol. 8668:
Medical Imaging 2013: Physics of Medical Imaging
Robert M. Nishikawa; Bruce R. Whiting; Christoph Hoeschen, Editor(s)
PDF: 6 pages
Proc. SPIE 8668, Medical Imaging 2013: Physics of Medical Imaging, 86681L (19 March 2013); doi: 10.1117/12.2007945
Show Author Affiliations
J. W. Stayman, Johns Hopkins Univ. (United States)
H. Dang, Johns Hopkins Univ. (United States)
Y. Otake, Johns Hopkins Univ. (United States)
Wojciech Zbijewski, Johns Hopkins Univ. (United States)
J. Noble, Vanderbilt Univ. (United States)
H. Dang, Johns Hopkins Univ. (United States)
Y. Otake, Johns Hopkins Univ. (United States)
Wojciech Zbijewski, Johns Hopkins Univ. (United States)
J. Noble, Vanderbilt Univ. (United States)
B. Dawant, Vanderbilt Univ. (United States)
R. Labadie, Vanderbilt Univ. (United States)
J. P. Carey, Johns Hopkins Univ. (United States)
J. H. Siewerdsen, Johns Hopkins Univ. (United States)
R. Labadie, Vanderbilt Univ. (United States)
J. P. Carey, Johns Hopkins Univ. (United States)
J. H. Siewerdsen, Johns Hopkins Univ. (United States)
Published in SPIE Proceedings Vol. 8668:
Medical Imaging 2013: Physics of Medical Imaging
Robert M. Nishikawa; Bruce R. Whiting; Christoph Hoeschen, Editor(s)
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