A nuclear imaging system for imaging of the breast including at least one gamma camera, having a radiation detecting surface, which detects gamma radiation and provides data signals responsive to radiation from the breast and a collimator, positioned over the reception surface. Encryption of the attribute information may be performed using symmetric encryption techniques, such as XOR andor stream cipher encryption. Within the window, the pane is presented at a first pane size. It is emphasized that this abstract is provided to comply with the rules requiring an abstract that will allow a searcher or other reader to quickly ascertain the subject matter of the technical disclosure. The gyricon platen cover also provides a black background for the document for pre-scan detection of the location of the edges of an original document for electronic registration, electronic skew correction and automatic magnification selection during scanning of the original document. A channel formation region of semiconductor layer in a thin film transistor for which high speed operation is required is made thinner than a channel formation region of a semiconductor layer of a thin film transistor for which high withstand voltage is required.