Cortico-spinal functional MRI covering a brain and a cervical spinal cord volume in the same acquisition, e.g. to investigate the interaction of brain and spinal cord areas, requires a dynamic shim update of the frequency and linear shim terms to obtain a reasonable EPI image quality in both volumes. Unfortunately, the optimum values for static higher-order and volume-specific dynamic linear shim terms cannot be determined with the standard shim algorithms provided by manufacturers. Here, a shim algorithm has been implemented that overcomes this problem and provides a better field homogeneity in the brain and spinal cord volumes.
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