Extraction of trabecular structures of mandible excluding tooth roots on dental panoramic radiographs using mathematical morphology. - Akira Asano; Takahiro Tambe; Akira Taguchi; Chie Muraki Asano; Takashi Nakamoto; Keiji Tanimoto; Takao Hinamoto; Mitsuji Muneyasu (ICPR (3), 2006)