Table 11. Multi-atlas label propagation results.
| Code | Region | Side | Manual volume | Automatic (MAPER) volume | Jaccard index | SD | CV% | Volume error (%) |
|---|---|---|---|---|---|---|---|---|
| 32 | AG | L | 16109 | 14956 | 0.58 | 0.09 | 16 | 0.23 |
| 33 | AG | R | 17444 | 16361 | 0.54 | 0.09 | 16 | -0.84 |
| 60 | postCG | L | 31404 | 31342 | 0.72 | 0.07 | 9 | 0.08 |
| 61 | postCG | R | 29277 | 29031 | 0.71 | 0.05 | 7 | -0.35 |
| 62 | SupPL | L | 46008 | 46456 | 0.77 | 0.05 | 7 | 2.25 |
| 63 | SupPL | R | 46735 | 47170 | 0.78 | 0.04 | 5 | 1.73 |
| 84 | SMG | L | 28091 | 27700 | 0.73 | 0.05 | 7 | 0.80 |
| 85 | SMG | R | 25541 | 24977 | 0.68 | 0.07 | 11 | 1.13 |
Automatically generated labels were compared with manually drawn labels by overlap and volume. Code: Region number in the Hammers_mith atlases. L: left. R: right. Manual volume: mean manual reference volume in mm3. Automatic (MAPER) volume: mean volume of automatically generated label in mm3. Jaccard index: mean Jaccard index (n = 30). SD: standard deviation of Jaccard index. CV%: coefficient of variation (i.e. SD as a percentage of JC). Volume Error: Mean volume error as a percentage: [100*(automatic (MAPER) volume − reference (manual) volume) / reference volume] calculated per individual value pair, then averaged across 30 subjects.