We propose a method that is a Combined Approach of Variable Flip Angle (VFA), Keyhole undersampling and Averaging (CAVKA). It is designed to optimize the use of the limited magnetization and to accelerate the acquisition in MRI series that suffer from low SNR and thus require averaging. The method is applied to the acquisition of a CEST (chemical exchange saturation transfer) image series, where the sensed nucleus is hyperpolarized 129Xe. There it provides ~4-fold SNR increase compared to conventional imaging without averaging or 7-fold acceleration with the same SNR compared to imaging with averaging.
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