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| Parameters | HT-SBRT | X-SBRT | P value |
|---|---|---|---|
| HI | 1.02±0.08 | 1.35±0.05 | 0.003 |
| CI | 0.84±0.04 | 0.51±0.07 | <0.001 |
HI, homogeneity index; CI, conformity index; PTV, planning target volume; SD, standard deviation; HT-SBRT, helical tomotherapy stereotactic body radiation therapy; X-SBRT, X-knife stereotactic body radiation therapy.
