Abstract #2792
Confounding effects of imaging gradients in stimulated echo: case of diffusion exchange imaging
Samo Lasic 1 , Henrik Lundell 2 , Casper Kaae Snderby 2 , Daniel Topgaard 3 , and Tim B. Dyrby 2
1
CR Development, Lund, Skne, Sweden,
2
Danish
Research Centre for Magnetic Resonance, Copenhagen
University Hospital, Hvidovre, Denmark,
3
Physical
Chemistry, Lund University, Lund, Skne, Sweden
In multiple diffusion encoding sequences with stimulated
echo, additional diffusion weighting introduced by the
slice and crusher gradients (together known as butterfly
gradients) may significantly disrupt the experimental
design and introduce a bias that cannot be easily
mitigated. We discuss the bias caused by butterfly
gradients in Filter EXchange Imaging (FEXI) and their
possible confounding effect on the measurement of
apparent exchange rate (AXR). The effect is exemplified
by the FEXI data acquired on a yeast suspension.
Simulation results indicate that reducing slice
thickness in FEXI leads to increasingly underestimated
AXR values.
How to access this content:
For one year after publication, abstracts and videos are only open to registrants of this annual meeting. Registrants should use their existing login information. Non-registrant access can be purchased via the ISMRM E-Library.
After one year, current ISMRM & ISMRT members get free access to both the abstracts and videos. Non-members and non-registrants must purchase access via the ISMRM E-Library.
After two years, the meeting proceedings (abstracts) are opened to the public and require no login information. Videos remain behind password for access by members, registrants and E-Library customers.
Click here for more information on becoming a member.
