Abstract #3409

Slice-by-slice Dynamic Shimming Based on a Chemical Shift-Encoded Acquisition to Improve Fat Suppression in DWI

Aidan Tollefson^1,2, Gaohong Wu³, Patricia Lan⁴, Arnaud Guidon⁵, Rianne A Van Der Heijden², Daiki Tamada², Ali Pirasteh^1,2, and Diego Hernando^1,2

¹Medical Physics, University of Wisconsin-Madison, Madison, WI, United States, ²Radiology, University of Wisconsin-Madison, Madison, WI, United States, ³GE Healthcare, Waukesha, WI, United States, ⁴GE Healthcare, Menlo Park, CA, United States, ⁵GE Healthcare, Boston, MA, United States

Synopsis

Keywords: Artifacts, FatB0 inhomogeneities can lead to failures in chemical shift-based fat suppression, particularly in complex susceptibility environments. Conventional volumetric shimming methods are frequently unable to compensate for these B0 inhomogeneities, which leads to residual fat signal and artifacts in various applications. We propose a slice-by-slice shimming method that relies on information (water-only image, fat-only image, B0 fieldmap) derived from a rapid chemical shift-encoded acquisition. This method demonstrated improved fat suppression in diffusion weighted imaging (DWI) of the upper leg and may lead to improved reliability in other applications.

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.

Click here for more information on becoming a member.