Abstract #2682
Correlations between different sources of contrast at 9.4T: diffusion vs. susceptibility
Yohan van de Looij 1,2 , Nicolas Kunz 2 , Rajika Maddage 2 , Rolf Gruetter 2,3 , Petra S Hppi 1 , and Stphane V Sizonenko 1
1
Division of Child Growth and Development,
University of Geneva, Geneva, GE, Switzerland,
2
Laboratory
for Functional and Metabolic Imaging, Ecole
Polytechnique Fdrale de Lausanne, Lausanne, VD,
Switzerland,
3
Department
of Radiology, University of Geneva and Lausanne, Geneva
and Lausanne, GE and VD, Switzerland
Diffusion Tensor Imaging (DTI) and Quantitative
Susceptibility Mapping (QSM) are two MR techniques given
a superb contrast between white and grey matter in the
brain. Diffusivity and anisotropy of water in the
tissues are derived from DTI whereas QSM is based on the
magnetic susceptibility distribution. The aim of this
work was to investigate the potential cross correlations
between DTI and QSM in the rat brain white matter at
ultra-high magnetic field. In addition to the effect of
magnetic field orientation and myelin, we suggest an
effect of axonal diameter/compaction to the QSM
contrast.
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