Positron emission tomography to assess hypoxia and perfusion in lung cancer

Figure 4 Representation of hypothetical considerations on the link between perfusion and the hypoxia signal as measured by imaging positron emission tomography. The continuous curve represents hypothetical level of hypoxia in tissue for increasing levels of perfusion (i.e., closer to the capillaries). The dotted line represents the positron emission tomography signal obtained from hypoxia imaging using an optimal imaging protocol. The horizontal line represents a threshold used for delineation of hypoxic areas.