Table 2.
T1, T2 and LGE signal intensity characteristics of acute and chronic myocardial infarction at 1.5T and 3T
| Field Strength | 3T | 1.5T | ||||||
|---|---|---|---|---|---|---|---|---|
| Time post MI | Day 7 | Month 4 | Day 7 | Month 4 | ||||
| Tissue Type | Remote | Infarcted | Remote | Infarcted | Remote | Infarcted | Remote | Infarcted |
| Native T1 (ms) | 1230±63 | 1563±154 | 1257±138 | 1485±139 | 924±72 | 1104±108 | 976±80 | 1060±116 |
| Native ΔT1 between Remote and Infarcted Myocardium (ms) | 329± 119 | 239±104 | 184±77 | 89±38 | ||||
| T2 (ms) | 46±4 | 64±9 | 44±4 | 46±3 | 50±4 | 69±5 | 49±5 | 51±6 |
| ΔT2 between Remote and Infarcted Myocardium (ms) | 18±6 | 2±3 | 19±7 | 2±5 | ||||
| %Change in Native T1 with respect to Remote | 26±8 | 19±7 | 14±8 | 12±6 | ||||
| %Change in LGE signal intensity with respect to Remote | 728±484 | 790±513 | 376±192 | 409±163 | ||||
| Sensitivity of Native T1 Maps | 94% | 95% | 84% | 58% | ||||
| Specificity of Native T1 Maps | 94% | 97% | 74% | 78% | ||||