Table 2 RPC and VPP average percentage of pixels passing the gamma criteria at 3%/3 mm, 5%/5 mm and 7%/4 mm for 12 institutions of the EORTC for IMRT complex dosimetry checks
RPC | VPP | |||||||
|---|---|---|---|---|---|---|---|---|
Institution number | 3%/3 mm (%) RPCPH | 5%/5 mm (%) RPCPH | 7%/4 mm (%) RPCPH | Number of verified fields | Measurement device | 3%/3 mm (%) [SD] INSTPH | 5%/5 mm (%) [SD] INSTPH | 7%/4 mm (%) [SD] INSTPH |
1 | 89.3 | 99.9 | 99.8 | Combined | Delta4 | 100.0 [-] | 100.0 [-] | 100.0 [-] |
2 | 62.9 | 82.0 | 91.2 | Combined | PTW 2D-array | 93.2 [-] | 99.0 [-] | 99.4 [-] |
3 | 78.1 | 99.9 | 97.8 | Combined | PTW 2D-array | 90.8 [0.9] | 100 [0.2] | 100 [0.3] |
4 | 84.7 | 98.2 | 99.5 | Combineda | PTW 2D-array | 84.1 [1.9] | 95.7 [0.6] | 96.4 [0.7] |
5 | 80.1 | 98.2 | 99.3 | Combineda | Varian Portal | 96.5 [3.3] | 99.8 [0.3] | 100.0 [0.0] |
6 | 96.4 | 99.8 | 99.9 | 9 | Varian Portal | 96.6 [2.2] | 99.4 [1.3] | 100.0 [0.0] |
7 | 96.5 | 99.8 | 100.0 | Combined | PTW 2D-array | 85 [1.3] | 96.6 [0.6] | 97.3 [0.5] |
8 | 89.1 | 96.9 | 98.1 | Combined | EDR2-Film | 89.1 [-] | 99.3 [-] | 99.9 [-] |
9 | 73.5 | 91.9 | 95.5 | Combined | Delta4 | 99.5 [-] | 100.0 [-] | 100.0 [-] |
10 | 79.6 | 94.1 | 98.8 | Combined | Delta4 | 98.4 [-] | 100.0 [-] | 100.0 [-] |
11 | 89.9 | 98.9 | 99.7 | Combined | EDR2-Film | 92.2 [-] | 97.0 [-] | 100.0 [-] |
12 | 72.5 | 93.0 | 96.8 | Combined | Delta4 | 97.1 [-] | 100.0 [-] | 100.0 [-] |
CDC | ||||||||
Pass at 80% pixel level | 7 | 12 | 12 | 12 | 12 | 12 | ||
Pass at 90% pixel level | 2 | 11 | 12 | 9 | 12 | 12 | ||
Pass at 95% pixel level | 2 | 8 | 11 | 6 | 12 | 12 | ||