Figure 3.

PDD curves calculated through the radiotherapy Eclipse planning system algorithms Batho, modified Batho, equivalent TAR, and anisotropic analytical algorithm (AAA); measured with thermoluminescent dosimetry and simulated using EGSnrc Monte Carlo code for a irradiation field of (a) $10\times 10{\text{cm}}^2$, (b) $5\times 5{\text{cm}}^2$, (c) $2\times 2{\text{cm}}^2$, and (d) $1\times 1{\text{cm}}^2$.