A 3D image display device is provided. In order to construct such a device in a more economical and more reliable manner, according to the invention the medical instrument is provided with a magnet device which is controllable by means of a control unit in such a manner that information concerning the position of the magnet device in MR data sets can be specifically changed. A label is included that extends about the circumference of the container with an inner surface contacting an exterior surface of the rear portion of the container wall and contacting an exterior surface of the front portion of the container wall. The device has advantages including retarded occurrence of dark spots, improved storage stability and durability, and reduced expense of manufacture. The communication channel is adapted to simultaneously supply power to the sensor means and receive the data for processing and subsequent display to a user of the system. Such systems may include a memory controller, a plurality of memory devices, a data bus coupling the memory controller with the plurality of memory devices, and at least one bus switch located in the data bus between the memory controller and one of the plurality of memory devices.