Reproducibility and Multi-vendor Accuracy Comparison of T1- and T2- Mapping Using 2D and 3D Synthetic MRI with GRAPPA, SENSE and Compressed Sense

To evaluate intra- and inter-scan repeatability of quantitative scans, T1-, T2- and PD maps were acquired simultaneously using the 2D multi-delay-multi-echo sequence and the 3D-QALAS sequence, for 3T scanners of three different manufacturers. All scans were acquired with and without acceleration factor of 2, using GRAPPA, SENSE or compressed sensing, depending on the vendor. On one scanner measurements were repeated 10 times. The estimated values using synthetic MRI were compared to the reference values of the ISMRM-NIST phantom. The results for T1- and T2- mapping show a linear curve close to the reference values, with good reproducibility.