The project will
aim at developing novel and
optimising existing measurement
methods of magnetic resonance
imaging (MRI) and MR spectroscopic
imaging (MRSI) for the non-invasive
characterisation of liquids and
gases in porous materials. The work will comprise both methodological
developments and applications, the
latter in close cooperation with
other Ph.D.
students of the graduate school.
All NMR studies will be performed on
a 7-Tesla NMR imaging system (Bruker
Biospec 70/20 USR) available in the
in-vivo-MR group of the department
of chemistry of the University of
Bremen.
For improved MRI
measurements of the distribution of
liquids and/or gases in porous
samples, methods will be developed
that allow to compensate for
off-resonance effects introduced by
the porous materials dependent on
the material properties and pore
size distribution or by chemical
shift effects.
Transport processes will be
investigated by fast velocity
mapping performed despite short
effective transverse relaxation
times as well as by quantitative
diffusion MRI. This work will be
performed in close cooperation with
the Ph.D. project on deep bed
filtration. For observing catalytic
reactions in gases studied in
another Ph.D. Project, spectroscopic
imaging sequences with minimised
echo time, i.e. minimised delay between radiofrequency excitation
and data acquisition, will be
developed to increase the SNR and
allow for detecting species with
very short transverse relaxation
times. All topics will include work on dedicated software
for data quantification.
The figure displays results obtained
by using an optimised
zero
echo time MRI sequence as well as
the 7-Tesla MRI system available for
the projects of the graduate school.
Contact:
Dreher
