Fig. 2
i T1 and T2 (in ms) in the T2 phantom (n = 1) as measured at 1.5 T and 3 T: slow scan reference T1 obtained using inversion recovery (IR) gradient echo (GRE) (purple) and reference T2 using single echo (SE) (orange); T1 via modified Look-Locker inversion recovery (MOLLI) T1 mapping (green) and T2 via balanced steady state free precession (bSSFP) T2 mapping (blue); T2 obtained by the manufacturer in Australia using a 1.4 T Bruker minispec relaxometer at 22 °C (red). Tube arrangement is such that the more temperature-dependent and therefore unstable long-T1 tubes are away from the corners and towards the middle of the 3 × 3 array. ii Exemplar T2 and T1 maps on a Siemens 3 T Prisma clinical CMR scanner. ID = tube identity