Application study on analyzing the anatomic structure of facial canal in cochlear by means of 128-slice spiral CT before cochlear prosthesis implantation

doi:10.3969/j.issn.1002-7386.2013.19.003

Abstract：Objective To use 128-slice spiral CT and multi-planar reconstruction and surface reconstruction technique to investigate the correlation between facial canal in different segments and surrounding anatomic structure in order to provide anatomical basis for cochlear prosthesis implantation .Methods 100 healthy subjects (200 ears) were scanned by 128-slice spiral CT,including 108 females and 92 males (age range,20~70 yr),with an average of 43.23 ±14.49 scan undergoing facial canal surface reconstruction ,facial canal and surrounding fixed anatomical location were observed and measured ,and distance values of facial canal in different segments and the segment values of facial canal were calculated .Results There were no significant differences in the two bending angle of facial canal and the length of labyrinthine segment between males and females in adults (P >0.05),there were no significant differences in the length of facial nerve tube tympanic segment and the shortest distance from semicircular canal protuberance as well as to tympanic segment of facial canal between males and females in adults ( P >0.05),moreover,there were no significant differences in the length of mastoid segment of facial canal and the shortest distance from jugular fossa and sigmoid sinus to mastoid segment of facial canal between males and females in adults ( P >0.05).Conclusion Facial canal high resolution spiral CT combined with multiplanar reformation as well as surface reconstruction technique is one of the excellent iconography methods to study facial canal anatomic structure ,which can accurately show adjacent relationship of surrounding structure of facial canal , which has important reference worth for cochlear prosthesis implantation and diagnosis for ear diseases .