Histological distributions of
Cu-radioactivity and HER2-positive tumor cells. Left column: HE staining; middle column: IHC; right column: autoradiography. Loupe images (upper panels) show identical distribution of radioactivity and location of HER2-positive tumor cells for HE stain, IHC, and autoradiography samples. Magnified images (lower panels, ×200) confirmed the radioactivity and HER2-positive status of tumor cells.