In the head-and-neck region, off resonance effects due to magnetic field inhomogeneities can lead to poor fat suppression. In this study we compare the current clinical practice of shimming (volume shim) with the gain of an image based approach. B0 field maps are analyzed using water/fat segmented Dixon images to estimate the fat suppression. Diffusion weighted images are used to verify the estimates for fat suppression. An image based shimming optimization was performed to simulate 1st and 2nd order shim field. Image based shimming is a promising technique to improve subject specific shimming and fat suppression in the head-and-neck region.
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