TABLE IV.
Comparison of step one registration results on a prostate MVCT and kVCT image pair in different ways of using MVCT structure contours for image intensity manipulation. The Dice similarity values in the rows 1–4 were computed on the corresponding organs on the two images after registration. The values in the row 5 are computed before registration.
| Intensity manipulation | Dice similarity values on organs | |||
|---|---|---|---|---|
| Bladder | Rectum | Prostate | ||
| 1 | Not applied | 0.84 | 0.76 | 0.72 |
| 2 | Bladder only | 0.98 | 0.77 | 0.87 |
| 3 | Bladder and rectum | 0.98 | 0.97 | 0.88 |
| 4 | Bladder, rectum, and prostate | 0.98 | 0.98 | 0.99 |
| 5 | Without registration | 0.43 | 0.74 | 0.86 |