An electrical isolation layer capable of inhibiting, if not preventing, a first conductive material from electrically passing or bleeding into a second conductive material and thereby causing a high resistance connection among the conductive materials is provided. A database model is provided which organizes information relating to sample preparation, chip layout, application of samples to chips, scanning of chips, expression analysis of chip results, etc. In this invention, output time of the management object data can be limited by using PC2. The DSP interfaces couples the DSP to the bus. A scratch buffer is used as a working buffer and replaces the function of a pitch buffer. From the third 3D volume data set a 2D substantially maximum intensity projection data set is created which may then be displayed to show the blood at the region.