FREE-BREATHING ABDOMINAL MAGNETIC RESONANCE FINGERPRINTING USING A PILOT TONE NAVIGATOR

摘要

A method for free-breathing abdominal magnetic resonance fingerprinting (MRF) includes applying a pilot tone (PT) RF signal in an MRI system environment using a PT RF signal source, acquiring MRF data from a region of interest in subject using free-breathing MRF pulse sequence and acquiring PT navigator signals based on the applied PT RF signal. The PT navigator signals are associated with a plurality of respiratory states and are encoded with acquired MRF data. The method further includes generating images for each of the plurality of respiratory states based on MRF data and the PT navigator signals. For each respiratory state, the generated images for the respiratory state are compared to a respiratory state MRF dictionary associated with the respiratory state to determine tissue property of the MRF data associated with the respiratory state. A quantitative parameter map may be generated for the determined tissue properties for each respiratory state.