Table 1.
The T1, T2, and weights corresponding to the dictionary entries used in simulation to create the mixed signals are listed in the column labeled “Ground Truth”. Next are the mean T1, T2 values which describe the results for three of the simulations (two with fully sampled data, and one with undersampled data) at different SNR values. At the end of each simulation, results were clustered into two groups using k-means, and the mean T1, T2 times for each group were calculated. These simulations were run using the full MRF time series.
| Ground Truth | Fully Sampled | Undersampled | |||||||||
|---|---|---|---|---|---|---|---|---|---|---|---|
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| SNR = 5.6 | SNR = 2.9 | SNR = 1.0 | |||||||||
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| T1 | T2 | Weight | T1 | T2 | Weight | T1 | T2 | Weight | T1 | T2 | Weight |
| 800 | 60 | 0.5 | 958.4 | 82.8 | 0.77 | 974.0 | 82.9 | 0.83 | 957.7 | 80.6 | 0.66 |
| 1300 | 120 | 0.5 | 1305.9 | 113.1 | 0.23 | 1297.6 | 119.6 | 0.17 | 1186.7 | 102.1 | 0.34 |
|
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| 800 | 60 | 0.5 | 826.2 | 67.2 | 0.48 | 903.1 | 77.1 | 0.56 | 989.1 | 90.8 | 0.63 |
| 1700 | 180 | 0.5 | 1703.3 | 174.6 | 0.52 | 1742.4 | 174.6 | 0.44 | 1674.5 | 159.1 | 0.37 |
|
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| 1700 | 180 | 0.5 | 1813.28 | 195.6 | 0.64 | 1756.8 | 184.5 | 0.59 | 1723.4 | 195.7 | 0.63 |
| 2950 | 500 | 0.5 | 2823.0 | 477.1 | 0.36 | 2776.8 | 456.7 | 0.41 | 2721.6 | 399.1 | 0.37 |
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| 800 | 60 | 0.9 | 848.7 | 69.7 | 0.93 | 850.3 | 67.7 | 0.93 | 857.6 | 66.4 | 0.91 |
| 1700 | 180 | 0.1 | 1760.5 | 153.1 | 0.07 | 1745.0 | 173.9 | 0.07 | 1744.2 | 241.2 | 0.09 |