Quantitative MR susceptibility mapping using piece-wise constant regularized inversion of the magnetic field Academic Article uri icon

Overview

MeSH Major

  • Algorithms
  • Magnetic Resonance Spectroscopy
  • Models, Chemical

abstract

  • Magnetic properties characterized by susceptibility and chemical shift linearly modify the local magnetic field experienced by spins. A piece-wise constant solution using magnetic resonance imaging is found to the challenging inversion problem from field to magnetic properties. The magnetic field shifts were estimated from MR phase images. The MR magnitude images were segmented into many regions of uniform magnetic properties. Standard linear regression using the calculated magnetic field from each region allowed accurate susceptibility quantification. The technique was experimentally validated on a variety of samples including water, vegetable oil, air, Gadolinium, and superparamagnetic iron oxides. Susceptibility was measured with a precision better than 0.1 ppm, in a range of 10 ppm. In vivo feasibility was shown on the forearm for which soft-tissue, cortical bone, and bone marrow susceptibility, and chemical shift values in good agreement with literature data were obtained.

publication date

  • October 2008

Research

keywords

  • Academic Article

Identity

Language

  • eng

Digital Object Identifier (DOI)

  • 10.1002/mrm.21710

PubMed ID

  • 18816834

Additional Document Info

start page

  • 1003

end page

  • 9

volume

  • 60

number

  • 4