A storage phosphor cassette including a shell having a cavity and a storage phosphor assembly having a substantially rigid plate. The rigid plate is adapted to be removably contained within the cavity of the shell and is also comprised of a material which is optically and/or radiographically transparent. A single storage phosphor screen is supported on one side of the substantially rigid plate such that both surfaces of the storage phosphor screen are optically and/or radiographically visible. In a preferred embodiment, the rigid plate can be comprised of one or more layers of clear acrylic, or at least one layer of glass disposed intermediate two layers of clear acrylic.