T1- and T2-prepared SSFP sequences for fast relaxometry at low field

摘要

Introduction: Low field approaches are gaining momentum for more accessible MRI-based diagnoses1. Quantitative relaxometry is a critical step towards comparable metrics in MRI2, despite being regrettably often set aside due to impractical acquisition times. Remarkably, low field relaxometry could be particularly compelling, benefitting from higher dispersion and potentially unveiling new contrasts3. With a further decreased sensitivity though, it becomes crucial to explore fast approaches for precise and accurate mapping of nuclei relaxation rates. The presented work reports on the use of magnetization prepared steady-state (SSFP) sequences tuned for fast T1 and T2 mapping at low field.