Figure 4.

(Color) Depth dose distributions for the Clarkson, MGS, and beam in the lung phantom, (a) $10\times 10{\text{cm}}^2$, 6‐MV beam, (b) $10\times 10{\text{cm}}^2$, 15‐MV beam. Isodose distributions for the MGS and beam along a central‐axis transverse plane, (c) $10\times 10{\text{cm}}^2$, 6‐MV beam, (d) $10\times 10{\text{cm}}^2$, 15‐MV beam.