A phase contrast pulse sequence was modified to use a single-sided bipolar encoding to calibrate the transverse gradient offsets for asymmetric gradient coils. The phase difference approach cancels the concomitant gradient field effects from all gradient waveforms except for the bipolar gradient waveforms. By fitting the measured phase offset in the phase difference images to the applied bipolar gradient amplitudes, the gradient offset value can be calculated. This was used for pre-emphasis compensation for the zeroth and first order concomitant gradient fields.
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.
Keywords