Abstract #3860
4D phase-contrast un-aliasing using both phase and magnitude
Junmin Liu 1 , Marcus T Alley 2 , Shreyas Vasanawala 2 , and Maria Drangova 1,3
1
Imaging Research Laboratories, Robarts
Research Institute, Schulich School of Medicine &
Dentistry, University of Western Ontario, London,
Ontario, Canada,
2
Department
of Radiology, School of Medicine, Stanford University,
Stanford, CA, United States,
3
Department
of Medical Biophysics, Schulich School of Medicine &
Dentistry, University of Western Ontario, London,
Ontario, Canada
Spatial and temporal unwrapping techniques often fail to
successfully un-alias 4D phase images when the data are
spatially and temporally undersampled. We developed a
new un-aliasing method for 4D flow MRI, which performs
3D spatial phase unwrapping first and then remove
temporal phase aliasing using the temporal profiles of
unwrapped phase and magnitude. In vivo results
demonstrate that incorporating the temporal magnitude
profile in the temporal un-aliasing process produces
aliasing-free 4D flow images, even when they are
acquired with low VENC (~ 50 cm/s), low temporal
resolution (~70 ms), and low spatial resolution (e.g.
torso imaging).
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.
