Table 3 (a) Dosimetric homogeneity indices in the PTV calculated for treatment plans 1 to 4 (all fields). The volume (%) that receives more than 110% and less than 93% of the prescribed dose (D50), V93 and V110 respectively, are also given. (b) PVDR and s-index in the PTV evaluated for treatment plans 3 and 4 (individual fields). The PVDR uncertainties are the standard deviation of the PVDR, as defined in section II.3.
From: First proton minibeam radiation therapy treatment plan evaluation
Plan No. | Glioma | Meningioma | ||||||||
|---|---|---|---|---|---|---|---|---|---|---|
PVDR (PTV) | s-index (%) | D95 (%) | V93 (%) | V110 (%) | PVDR (PTV) | s-index (%) | D95 (%) | V93 (%) | V110 (%) | |
(a) | ||||||||||
1 | 1.05 ± 0.06 | 2.2 | 98 | 0 | 0 | 1.06 ± 0.08 | 3.7 | 94 | 1.0 | 0 |
2 | 1.03 ± 0.04 | 3.3 | 97 | 0 | 0 | 1.04 ± 0.08 | 5.4 | 91 | 7.6 | 0.3 |
3 | 1.04 ± 0.08 | 5.5 | 93 | 2.0 | 0.2 | 1.05 ± 0.12 | 7.0 | 91 | 12.2 | 3.4 |
4 | 1.13 ± 0.16 | 11.2 | 88 | 14.5 | 7.8 | 1.05 ± 0.14 | 9.4 | 88 | 20.2 | 15.7 |
Plan 3 | Plan 4 | |||||||||
Glioma | Meningioma | Glioma | Meningioma | |||||||
PVDR (PTV) | s-index (%) | PVDR (PTV) | s-index (%) | PVDR (PTV) | s-index (%) | PVDR (PTV) | s-index (%) | |||
(b) | ||||||||||
Field 1 | 1.06 ± 0.12 | 8.2 | 1.04 ± 0.12 | 8.7 | 1.2 ± 0.3 | 16.5 | 1.09 ± 0.23 | 15.3 | ||
Field 2 | 1.10 ± 0.14 | 9.8 | 1.06 ± 0.14 | 8.2 | 1.3 ± 0.4 | 23.3 | 1.06 ± 0.16 | 11.0 | ||
Field 3 | 1.06 ± 0.10 | 6.7 | — | — | 1.2 ± 0.2 | 15.7 | — | — | ||
