fig4
![Imaging of hypoxia in human glioblastoma with dynamic 18F-fluoromisonidazole PET](https://image.oaes.cc/439853b5-e098-4249-9191-4af89e3a3b38/2982.fig.4.jpg)
Figure 4. The time-activity curves (TACs) of the distribution volume clusters in Figure 3 were normalized here with IF (left column) and with TAC obtained from a contralateral normal tissue. The straight line represents the threshold of 1.2 above which the cluster was considered as hypoxic