Trade-off between Readout Duration and Concomitant Field Effect in 3D MRF at 0.55T

Motivation: The use of long readouts in 3D MRF improves SNR efficiency but also suffers from stronger concomitant field effects. Goal(s): To evaluate the trade-off between readout duration and concomitant field effects in 0.55T 3D MRF and evaluate mitigation using the MaxGIRF framework. Approach: We performed 0.55T 3D MRF scans of 14 readout durations on the NIST/ISMRM phantom and compared reconstructions with and without concomitant field effects compensation. We analyzed T1 array's standard deviations as a function of readout duration. Results: With correction, MRF T1 standard deviation reduced to stability due to improved SNR efficiency of long readouts, however, broke due to uncorrectable blurring. Impact: Practical trade-off between a readout duration and concomitant field effects are demonstrated. 0.55T 3D MRF benefits from a longer readout duration (6.1-14.7ms) provided a concomitant field effect correction.