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Bayesian model selection and classification: application to brain tissues through T distribution Gideoni, Iftah
Abstract
A Bayesian procedure for model selection, parameter estimation and classification, using models of non-orthogonal basis functions, is applied to the problem of T2 decay rate distributions in brain tissues. The feasibility of generating reliable synthetic images of tissue-classified pixels is examined. The work determines, for the first time, the Bayesian probability of existence of short (5-15ms) T2 component in the brain tissues, and found it to be higher than 99% for all white matter tissues and higher than 80% for all gray matter tissues except Cortical Gray . The probability of having no more than three components of decaying exponents in the Ti distributions of the brain tissues, is found to be higher than 90% for all the tissues. We arrive to these findings through the use of models which are parameterized by highly coupled parameters, and the use of multi-dimensional search in the space of these models.
Item Metadata
Title |
Bayesian model selection and classification: application to brain tissues through T distribution
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Creator | |
Publisher |
University of British Columbia
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Date Issued |
1995
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Description |
A Bayesian procedure for model selection, parameter estimation and classification, using
models of non-orthogonal basis functions, is applied to the problem of T2 decay rate
distributions in brain tissues. The feasibility of generating reliable synthetic images of
tissue-classified pixels is examined. The work determines, for the first time, the Bayesian
probability of existence of short (5-15ms) T2 component in the brain tissues, and found it
to be higher than 99% for all white matter tissues and higher than 80% for all gray matter
tissues except Cortical Gray . The probability of having no more than three components
of decaying exponents in the Ti distributions of the brain tissues, is found to be higher
than 90% for all the tissues. We arrive to these findings through the use of models which
are parameterized by highly coupled parameters, and the use of multi-dimensional search
in the space of these models.
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Extent |
6538546 bytes
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Genre | |
Type | |
File Format |
application/pdf
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Language |
eng
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Date Available |
2009-01-19
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Provider |
Vancouver : University of British Columbia Library
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Rights |
For non-commercial purposes only, such as research, private study and education. Additional conditions apply, see Terms of Use https://open.library.ubc.ca/terms_of_use.
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DOI |
10.14288/1.0086784
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URI | |
Degree | |
Program | |
Affiliation | |
Degree Grantor |
University of British Columbia
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Graduation Date |
1995-11
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Campus | |
Scholarly Level |
Graduate
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Aggregated Source Repository |
DSpace
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Item Media
Item Citations and Data
Rights
For non-commercial purposes only, such as research, private study and education. Additional conditions apply, see Terms of Use https://open.library.ubc.ca/terms_of_use.