Fig. 3.

Global variation of the hypoxic target volume, contoured on obtained pO₂ maps using a 10 mmHg threshold, as a function of time for the three available time points for the entire group of responders (full black squares) and non-responders (full red circles). Time in days is calculated from the start of the radiation treatment. The two linear regression curves are shown in the figure for recurrent (red dashed line) and non-recurrent (black dashed line) tumours. (For interpretation of the references to colour in this figure legend, the reader is referred to the web version of this article.)