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  4. The importance of priors for l2 regularization and total variation methods in quantitative susceptibility mapping
 
conference paper

The importance of priors for l2 regularization and total variation methods in quantitative susceptibility mapping

Khabipova, Diana  
•
Marques, José P.
•
Puy, Gilles  
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2012
Magnetic Resonance Materials in Physics, Biology and Medicine
29th Annual Meeting of the European Society for Magnetic Resonance in Medicine and Biology (ESMRMB)

Phase imaging has been demonstrated to offer a good contrast between and within brain tissues at 7T[1] with iron and myelin concentration being amongst the main modulators of the observed contrast due to their para- and dia-magnetic properties.Phase imaging suffers from a non-local contrast variation which can be overcome by calculating the underlying magnetic susceptibility maps[2].As this problem is ill-posed, many regularized methods have been proposed over the past years[2,3,4].The regularized single-orientation (RSO)[2] based on the l2 regularisation and the morphology enabled dipole inversion (MEDI)[3] method based on the l1 total variation incorporate prior knowledge of the expected edges taken from the magnitude image.In this abstract a systematic evaluation is performed of a l2 RSO method[2,5] and a l1 total variation method (TV)[3] using numerical data and different morphology priors.

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ESMRMb2012_Khabipova_final.pdf

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http://purl.org/coar/version/c_970fb48d4fbd8a85

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