Fig. 5From: Quantitative evaluation of oxygen metabolism in the intratumoral hypoxia: 18F-fluoromisonidazole and 15O-labelled gases inhalation PETImmunohistochemistry of the intratumoral hypoxic region (pimonidazole staining). a Overall image of the tumor (summed image of ×20 magnification), b boundary zone: red color square, c hypoxic region: yellow color square, and d necrotic region: blue color square (×200 magnification)Back to article page