By incorporating on-chip multiplication gain, the electron multiplying CCD achieves, in an all solid-state sensor, the single-photon detection sensitivity typical of intensified or electron-bombarded CCDs at much lower cost and without compromising the quantum efficiency and resolution characteristics of the conventional CCD structure.
An adherent culture of rat thoracic aorta cells (A7r5 line) was transferred to an incubation dish and treated with MitoTracker Red CMXRos and Hoechst 33258 for live-cell imaging. This combination of fluorophores highlights the proximity of nuclei and mitochondria in living cells. Images were recorded in grayscale with a Hamamatsu ORCA-AG camera system coupled to an Olympus BX-51 microscope equipped with bandpass emission fluorescence filter optical blocks provided by Semrock. During the processing stage, individual image channels were pseudocolored with RGB values corresponding to each of the fluorophore emission spectral profiles.