Echo-Planar-Imaging1 (EPI) with trapezoidal Readout (RO) and blipped Phase-Encoding (PE) gradients gives a high level of acoustic noise2. To reduce acoustic noise we suggest prolonging the duration of the blipped PE gradient in combination with a sinusoidal or trapezoidal RO gradient and continuous data sampling throughout the whole RO train. This results in a variable density sampling along PE (less dense at the edges, denser in the centre of k-space) with a non-Cartesian trajectory, where we use ESPIRiT3 to reconstruct the data. The efficiency is improved due to continuous data sampling, resulting also in a reduced echo time.
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