A cassette handling apparatus of a storage phosphor reader, which is used for reading a latent image stored in a storage phosphor contained in a cassette. The fluid comprises an invert oil emulsion compatible with oil based drilling fluids and having a suspension agent comprising polyurea and dimer diamine. a TV conference system or a TV telephone system, in which an image to be transmitted or received is captured and reconstructed into a virtual view point image which may appear as if it is captured by a virtual camera.