Comparison of Interictal and Ictal Images Using VOI Analysis
| Patient | Method | Ictal-to-interictal ratio of means in cerebellar VOI | Ictal-to-interictal relative differences in 1 selected target VOI | ||
|---|---|---|---|---|---|
| Mean (%) | Pixels above 10% (%) | ||||
| A | Max | 0.96 | 44 | 97 | |
| Mean | 1.11 | 65 | 97 | ||
| DSC-2 | 1.32 | 93 | 97 | ||
| B | Max | 0.95 | 12 | 56 | |
| Mean | 1.00 | 17 | 73 | ||
| DSC-2 | 1.00 | 17 | 70 | ||
| C | Max | 1.07 | 23 | 84 | |
| Mean | 1.05 | 21 | 81 | ||
| DSC-2 | 1.04 | 19 | 76 | ||
Patients A, B, and C are the patients of Figs. 3, 4, and 5, respectively, and are representative of the 3 categories distinguished for gray-level normalization. Ratio of means and relative differences were calculated between reference image and mobile normalized image, according to different normalization methods.