T1 mapping performance and measurement repeatability: results from the multi-national T1 mapping standardization phantom program (T1MES)

The T1MES CE/FDA approved phantom is a robust quality assurance device. In a multi-center setting, T₁ mapping had performance differences between field strengths, sequences, scanner software versions, and manufacturers. However, several specific combinations of field strength, sequence, and scanner are highly repeatable, and thus, have potential to provide standardized assessment of T₁ times for clinical use, although temperature correction is required for native T₁ tubes at least.