Figure 2.

The plot compares pre‐ and postcontrast T₁ differences between 1.5T and 3T (T1@3T – T1@1.5T) for all 10 subjects (combined 0.1 mmol/kg and 0.2 mmol/kg). The T₁ difference between 1.5T and 3T decreases following contrast injection, and the decrease is more significant for myocardium than blood. Following contrast injection, the T₁ difference remains relatively constant over time and is insensitive to dose and tissue type. Ten minutes postinjection the T₁ difference decreased 72% for myocardium and 30% for blood. Although there was significant variability in T₁ among subjects, the relaxation times at 3T were still generally greater than 1.5T.