Low-field systems have recently gained interest because of the potential to make MRI more accessible, but the field reduction comes at expense of low SNR and challenges with fat suppression. This work describes a new concept for fat separation at low field, based on radial acquisition during frequency-sweep RF saturation and combined with frequency-resolved XD-GRASP reconstruction. The approach is demonstrated for free-breathing abdominal imaging using a radial stack-of-stars 3D bSSFP sequence at 0.55T, showing that fat and water can be reliably distinguished based on the response to saturation at different frequencies. Fat-suppressed composite images can be calculated as final step.
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