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Correlation coefficient of intracranial pixel value histograms
| Correlation coefficient | No. of cases |
|---|---|
| > 0.998 | 14 (12) |
| 0.996–0.998 | 58 (49) |
| 0.994–0.996 | 31 (26) |
| 0.992–0.994 | 7 (6) |
| < 0.992 | 9 (7) |
The intracranial pixel value histograms between the original and deformed images were higher than 0.990 in all cases, indicating a high degree of similarity. Data are numbers of cases, with percentages in parentheses
