Table 4 Deviation unacceptable rates (expressed as percentage) for the different dosimetric criteria
Structure | Dosimetric Parameter | Photon IMRT | Proton PSPT |
|---|---|---|---|
% of cases failed to meet the criteria | % of cases failed to meet the criteria | ||
PTV | % of PTV covered by RX | 0 | 0 |
PTV minimum | 23 | 28 | |
PTV maximum | 0 | 4 | |
Spinal Cord | Maximum dose | 4 | 0 |
Total Lung (both lungs – GTV) | V5 | 4 | 0 |
V20 | 4 | 0 | |
Mean dose | 12 | 4 | |
Heart | V30 | 8 | 0 |
V45 | 4 | 0 | |
Brachial Plexus | V70 | 10 | 5 |
V74 | 10 | 0 | |
V75 | 5 | 0 |