Correlation-weighted ²³Na magnetic resonance fingerprinting in the brain.

ABSTRACT: We developed a new sodium magnetic resonance fingerprinting (²³Na MRF) method for the simultaneous mapping of T1,T2,long*,T2,short* and sodium density with built-in ΔB1+ (radiofrequency transmission inhomogeneities) and Δf0 corrections (frequency offsets). We based our ²³Na MRF implementation on a 3D FLORET sequence with 23 radiofrequency pulses. To capture the complex spin 32 dynamics of the ²³Na nucleus, the fingerprint dictionary was simulated using the irreducible spherical tensor operators formalism. The dictionary contained 831,512 entries covering a wide range of T1,T2,long*,T2,short*,ΔB1+ factor and Δf0 parameters. Fingerprint matching was performed using the Pearson correlation and the resulting relaxation maps were weighted with a subset of the hi

SUBMITTER: O'Donnell LF 

PROVIDER: S-EPMC11661289 | biostudies-literature | 2025 Jul

REPOSITORIES: biostudies-literature