A novel method for dipole inversion in QSM with reweighted L2-norm using distribution specification Conference Paper uri icon

Overview

MeSH Major

  • Cystamine
  • Gadolinium DTPA
  • Magnetic Resonance Angiography
  • Polymers

abstract

  • © 2015 IEEE. Dipole inversion is the final step of the QSM algorithm. In this step, the zero cone surface in the dipole kernel makes the field-to-susceptibility inverse problem ill-posed. Current solutions are mostly based on the Bayesian approach. Compared to the L1-norm, which has been used in previous techniques, the L2-norm converges faster. Therefore, we propose to employ a reweighted L2-norm using weights that are renewed after each iteration such that the multiplication of weights and the susceptibility gradient satisfy the Gaussian distribution. This is considered to be consistent with the a priori knowledge of the L2-norm. Results of phantom and in vivo experiments demonstrate that this novel Distribution Specified Dipole Inversion (DSDI) method enhances the quality of QSM reconstruction image and shortens calculation time remarkably.

publication date

  • January 2015

Research

keywords

  • Conference Paper

Identity

Digital Object Identifier (DOI)

  • 10.1109/ISBI.2015.7163935

Additional Document Info

start page

  • 560

end page

  • 563

volume

  • 2015-July