The mixing time for double diffusion encoding (DDE) should be set low to reduce the relaxation effects but also high enough for estimating microscopic fractional anisotropy. We tested the adequacy of the mixing time of 30 msec by comparing acquisitions with parallel and anti-parallel directions as well as with orthogonal and collinear directions. Relatively short mixing time for our cohort was adequate to evaluate the microscopic fractional anisotropy not only in the normal brain area of the white matter and the central gray matter, but also in pathologically abnormal areas such as brain tumors.
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