Figure 3.

(Upper) The dose distribution on one traverse slice (Patient A with five metastases). The red and yellow arcs represent the fields; the red “+” is the isocenter of the fields; the cyan outlines represent the targets on this slice. (Lower) The plan DVH for Patient A. $\text{PTVn}=\text{the different lung targets}$, PTV was the sum of all PTVn; $\text{TNL}=\text{total normal lungs}$, meaning the volume $(\text{left lung}+\text{right lung}–\text{CTV})$; $\text{CTV}=\text{clinical target volume}$.