A method for obtaining a segmented region corresponding to an anatomical organ in a volume image generates a smoothed image from the volume image and forms a core segmentation of the volume image according to the smoothed image. The memory controller receives read and write requests from a processor, determines a daisy chain of memory chips that the request is directed to, determines which memory chip in the chain of memory chips the request is directed to, and transmits an addresscommand word recognizable by the correct memory chip. The speech recognition section analyzes and recognizes the voice signal and thereby obtains voice data. This consequently allows reliable initialization of the internal circuit.