Table 2 Showing the variation during a 52 week period of the Phantom unadjusted T1 and T2 values and ECV using an 11-cycle 8-image MOLLI native (pre-Gd) 5(3)3 and post-Gd 4(1)3(1)2. Two phantoms for each T1 and T2 mixture were installed in the box. The value used for analysis represents the average of the two. The phantom ECV was calculated from the myocardial and blood native and post-Gd phantom T1 values using a haematocrit of 0.425. This was a chosen value representing a typical adult human haematocrit

From: Magnetic resonance imaging phantoms for quality-control of myocardial T1 and ECV mapping: specific formulation, long-term stability and variation with heart rate and temperature