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The following table contains pooled Karcher variances for the three initialization strategies: (1) hierarchical clustering with complete linkage, (2) hierarchical clustering with average linkage, and (3) partitioning around medoids (PAM).
| MRI modality | Hierarchical (complete) | Hierarachical (average) | PAM |
|---|---|---|---|
| T1-weighted post contrast | 2.6663 | 5.5457 | 2.4446 |
| T2-weighted FLAIR | 5.0315 | 5.7524 | 2.3261 |
| Bivariate | 14.7683 | 17.4325 | 9.3037 |
