Non-uniformity correction using cosine functions basis and total variation constraint

In this paper we introduce a new non-uniformity correction technique for receiver dependent intensity fluctuations in NMR images. Our method was designed for lower limb images, particularly those acquired in the context of muscular dystrophy studies . The new approach was motivated by the fact that...

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Bibliographic Details
Published in2010 IEEE International Symposium on Biomedical Imaging: From Nano to Macro pp. 748 - 751
Main Authors Azzabou, N, de Sousa, P Loureiro, Carlier, P G
Format Conference Proceeding
LanguageEnglish
Published IEEE 01.04.2010
Subjects
Cosine basis
Design methodology
Entropy
Image analysis
Laboratories
Magnetic resonance imaging
Muscles
Non-Uniformity
Nuclear magnetic resonance
Pathology
Polynomials
Spline
Total variation
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Summary:In this paper we introduce a new non-uniformity correction technique for receiver dependent intensity fluctuations in NMR images. Our method was designed for lower limb images, particularly those acquired in the context of muscular dystrophy studies . The new approach was motivated by the fact that in pathological cases we cannot make assumption about the characteristics of the various tissues in the image, which is a prerequisite and a main limitation for the numerous techniques proposed in the literature. In this work we considered a parametric model for the non-uniformity field based on combination of cosine functions. The estimation of the parameters was done by minimizing a cost function that reduces the variance in the subcutaneous fat as well as the total variation of the non-uniformity function. Experimental results were promising and showed the efficiency of the proposed approach.
ISBN:9781424441259
1424441250
ISSN:1945-7928
1945-8452
DOI:10.1109/ISBI.2010.5490068