The cell volume fraction (CVF), derived from tissue sodium concentration as measured by quantitative sodium MR imaging, in the human brain is high (~0.82) and maintained with normal aging despite decreases in brain volume. The gender difference (females: 0.807±0.009; males: 0.827±0.011, p<0.001) is also maintained over normal aging. This difference is posited to reflect the energy saving from higher CVF required for the larger male brain with higher number of neurons and synapses compared to female brains.
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