Table 1 showing the variability during a 52 week period of the Phantom T1 and T2 values and ECV using an 11-cycle 8-image prototype MOLLI. There were 2 phantoms for each T1 and T2 value prepared in standardised laboratory and the value used here represents the average of the two. The phantom ECV was calculated using a hematocrit of 0.43.
From: Longitudinal stability of gel T1 MRI Phantoms for quality assurance of T1 mapping
| Â | T1 | T2 | |||||||
|---|---|---|---|---|---|---|---|---|---|
| Â | Mean (ms) | SD | CoV (%) | Mean (ms) | SD | CoV (%) | Mean (ms) | SD | CoV (%) |
| Â | High Resolution (75bpm) | Low resolution (100bpm) | Spin-echo protocol | ||||||
Native Myocardium | 972 | 12.6 | 1.3 | 972 | 13.6 | 1.4 | 56 | 1.3 | 2.2 |
Native Blood | 1579 | 56.4 | 4.6 | 1550 | 61.9 | 4.0 | 234 | 8.0 | 3.4 |
Post Gd Myocardium | 498 | 5.1 | 1.0 | 497 | 13.5 | 1.4 | 48 | 0.9 | 1.9 |
Post Gd Blood | 372 | 6.4 | 1.7 | 372 | 6.5 | 1.8 | 149 | 3.0 | 2.0 |
ECV | 27.4% | 0.9 | 3.2 | 27.6% | 0.9 | 3.1 | Â | Â | Â |