Maps of the B0 field are routinely used for MRI scanner calibration and for post-processing corrections of geometric distortions. However, several sources of bias are present in conventional field estimates, which will result in uncorrected image artifacts, yet it is unclear what the magnitude of these biases are, whether these are large enough to warrant concern, and how to reduce these errors to extract more accurate field estimates. Here we investigate the accuracy of the standard B0 field map acquisition, demonstrate that the estimated fields vary with several acquisition parameters, and investigate sources of these errors.
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