Table 4 Examples of minibeam size (FWHM), PVDR and valley doses evaluated at different depths for treatment plans 3 and 4. 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
Depth (mm) | ctc: 4 mm | ctc: 6 mm | ||||
|---|---|---|---|---|---|---|
Beam size (mm) | PVDR | Valley dose (%) | Beam size (mm) | PVDR | Valley dose (%) | |
(a) Glioma (field 2) | ||||||
1 | 0.7 | 19.2 ± 1.5 | 6.2 | 1.0 | 29.1 ± 1.9 | 6.2 |
10 | 0.7 | 17.5 ± 0.6 | 6.5 | 1.1 | 29.1 ± 0.9 | 6.5 |
20 | 0.9 | 12.8 ± 0.8 | 7.1 | 1.2 | 23.9 ± 1.3 | 6.9 |
40 | 1.2 | 7.1 ± 0.7 | 7.5 | 1.6 | 16.2 ± 1.4 | 7.1 |
60 | 1.7 | 3.6 ± 0.2 | 8.3 | 2.0 | 10.8 ± 0.9 | 12 |
80 | 2.1 | 1.2 ± 0.1 | 71 | 3.1 | 1.5 ± 0.1 | 61 |
90 | 2.2 | 1.1 ± 0.1 | 93 | 3.2 | 1.4 ± 0.2 | 84 |
ctc: 4 mm | ctc: 6 mm | |||||
Depth (mm) | Beam size (mm) | PVDR | Valley dose (%) | Beam size (mm) | PVDR | Valley dose (%) |
(b) Meningioma (field 1) | ||||||
1 | 0.7 | 16.8 ± 2.3 | 5.2 | 0.8 | 44 ± 18 | 5.1 |
10 | 0.7 | 12.4 ± 1.5 | 5.8 | 0.8 | 35 ± 1 | 5.3 |
20 | 0.8 | 9.2 ± 0.4 | 6.1 | 0.8 | 22.6 ± 0.7 | 5.5 |
40 | 1.2 | 5.2 ± 0.2 | 7.0 | 1.5 | 13.6 ± 0.4 | 5.7 |
60 | 2.0 | 2.4 ± 0.1 | 9.1 | 2.6 | 7.0 ± 0.3 | 6.5 |
80 | 2.3 | 1.3 ± 0.1 | 13.5 | 3.2 | 2.9 ± 0.1 | 21 |
90 | 2.4 | 1.1 ± 0.2 | 73 | 3.2 | 1.6 ± 0.2 | 65 |
