From: Effects of the Bragg peak degradation due to lung tissue in proton therapy of lung cancer patients
Patient | Modulation | Beam direction: 0° | Beam direction: 270° | Beam direction: 315° | ||||||
---|---|---|---|---|---|---|---|---|---|---|
Dmean | D98% | D2% | Dmean | D98% | D2% | Dmean | D98% | D2% | ||
2 | Dnon-mod in Gy (RBE) | 29.9 | 23.4 | 32.0 | 30.1 | 25.2 | 31.1 | 30.0 | 22.1 | 32.3 |
450 μm | −1.8% | −0.7% | −0.2% | − 1.1% | − 0.8% | − 0.7% | −1.1% | − 1.5% | − 0.7% | |
800 μm | − 3.1% | − 2.9% | − 3.8% | − 1.9% | −1.4% | − 1.1% | − 2.0% | − 2.5% | −1.2% | |
3 | Dnon-mod in Gy (RBE) | 30.0 | 25.8 | 32.2 | 30.1 | 28.3 | 31.5 | 30.0 | 27.0 | 31.9 |
450 μm | −1.1% | −1.4% | −0.9% | −0.6% | −2.9% | − 0.5% | − 0.8% | − 2.2% | − 0.8% | |
800 μm | − 1.8% | −2.8% | −1.5% | − 1.1% | −5.1% | −0.8% | −1.4% | − 4.2% | − 1.1% | |
4 | Dnon-mod in Gy (RBE) | 30.0 | 25.7 | 31.0 | 30.0 | 24.2 | 32.2 | 30.0 | 26.8 | 30.8 |
450 μm | −1.3% | −2.5% | −0.8% | −0.6% | −1.2% | − 0.3% | − 0.6% | −1.1% | − 0.4% | |
800 μm | − 2.2% | −4.2% | − 1.2% | −1.0% | −2.0% | − 0.5% | −1.0% | −2.0% | − 0.7% | |
5 | Dnon-mod in Gy (RBE) | 30.1 | 27.2 | 32.8 | 30.0 | 23.7 | 31.6 | 30.1 | 27.9 | 33.8 |
450 μm | −2.6% | −0.5% | −1.1% | −2.0% | −3.0% | − 2.1% | −3.0% | − 1.5% | −3.2% | |
800 μm | −4.7% | − 2.8% | −2.1% | − 3.1% | − 4.6% | − 3.2% | − 4.9% | −2.5% | −4.3% |