Objective:Images of temporal bone are obtained on Siemens 64 slices spiral CT scanner with high resolution scanning to describe the course of facial nerve for better preoperative evaluation of CAEMA.Method:To describe the course of facial nerve on rectangular coordinate system from three silce on HRCT,29patients(35ears)are enrolled in our study in ENT department from November 2005 to March 2007 in the second affiliated hospital of sun yan sen university,who are all diagnosed not acquired deformity but CAEME...