From: Advanced techniques improve the performance of myocardial perfusion imaging
 | Volunteers | Patients | ||||||||
---|---|---|---|---|---|---|---|---|---|---|
 | st-GRE | kt-SSFP | p value | st-GRE | kt-SSFP | p value | ||||
Image quality | n | % | n | % | Â | n | % | n | % | Â |
0 non-diagnostic | 1 | 6% | 0 | Â | Â | 0 | Â | 0 | Â | Â |
1 poor | 0 | Â | 0 | Â | Â | 3 | 10% | 0 | Â | Â |
2 moderate | 12 | 75% | 3 | 19% | 0.003 | 12 | 40% | 2 | 6% | 0.012 |
3 good | 3 | 19% | 12 | 75% | Â | 12 | 40% | 17 | 53% | Â |
4 excellent | 0 | Â | 1 | 6% | Â | 3 | 10% | 13 | 41% | Â |
Respiratory artefacts | Â | Â | Â | Â | Â | Â | Â | Â | Â | Â |
0 non-diagnostic | 0 | Â | 0 | Â | Â | 0 | Â | 0 | Â | Â |
1 severe | 0 | Â | 1 | 6% | Â | 0 | Â | 2 | 6% | Â |
2 moderate | 3 | 19% | 5 | 31% | 0.07 | 7 | 23% | 7 | 22% | 0.17 |
3 mild | 7 | 44% | 7 | 44% | Â | 8 | 27% | 16 | 50% | Â |
4 nil | 6 | 38% | 3 | 19% | Â | 15 | 50% | 7 | 22% | Â |
Dark rim artefact | Â | Â | Â | Â | Â | Â | Â | Â | Â | Â |
Extent(%) | 39±13 |  | 15±12 |  | <0.0001 | 33±14 |  | 12±10 |  | <0.0001 |
Transmurality | 1.83±0.58 |  | 1.02±0.06 |  | <0.0001 | 1.57±0.40 |  | 1.07±0.17 |  | <0.0001 |
Duration | 10.6±3.56 |  | 9.7±2.51 |  | 0.373 | 10.8±3.7 |  | 8.0±2.7 |  | 0.004 |