Figure 3. Example of a MC‐calculated treatment plan for a LW‐seated tumor using (a) standard method, (b) iterative reoptimization, and (c) noncoplanar beam technique with 110% and 100% isodose lines (IDLs) highlighted. In the standard technique (panel a), note that the hot spot is pulled past the tumor center and into the nearby ribs, while a high dose gradient exists on the lung‐embedded side of the tumor. Using iterative reoptimization (panel b), the hot spot has been reduced (note that the 110% IDL line is not longer there) and moved away from the ribs, and the large gradients across the tumor are absent. When using noncoplanar beams (panel c), the hot spot has been moved into the tumor center, reducing the high dose to the ribs and pushing the high dose gradients to the tumor periphery.