3052
Fast-Sweep Frequency-Modulated SSFP: Boosting Sensitivity for 3D Joint T1/T2 Mapping
Volkert Roeloffs1, Nick Scholand1,2, and Martin Uecker1,2,3
1Institute for Diagnostic and Interventional Radiology, University Medical Center Göttingen, Goettingen, Germany, 2DZHK (German Centre for Cardiovascular Research), Partner Site Göttingen, Germany, Goettingen, Germany, 3Campus Institute Data Science (CIDAS), University of Göttingen, Göttingen, Germany, Goettingen, Germany
Choosing a higher modulation speed in frequency-modulated SSFP sequences increases sensitivity to T1 and T2. We combine this fast-sweep frequency-modulated SSFP with stack-of-stars sampling and demonstrate 3D joint T1/T2/B1/off-resonance mapping.
Fig 4: Synthesized time series after subspace-constrained reconstruction with intensity-coded magnitude and color-coded phase. Frame rate equals acquisition rate (8s sweep duration).
Fig 5: Parameter maps obtained after pixelwise fitting of subspace-constrained reconstruction.