Objective To evaluate the value of high resolution spiral CT multiplanar reformatting (MPR) and curved planar reformatting (CPR) for displaying the facial nerve canal (FNC) in the diagnosis and treatment of Ram-say-Hunt Syndrome and Bell's palsy. Methods We retrospectively reviewed clinical and imaging data of 105 patients, seen at Beijing Electric Hospital from May 2014 to May 2015, who were diagnosed with Ramsay-Hunt Syndrome (n=42) or Bell palsy. Patients were examined by high resolution spiral CT and MPR and CPR were used to display the fa-cial nerve canal. The diameter of the facial nerve canal at different positions was established and compared between the two peripheral facial paralysis conditions for inter-condition and time course correlations. Results 1.Measurements of the healthy and disease sides showed statistically significant differences in both groups. 2. The diameter and cross-sec-tional area of geniculate ganglion, as well as diameter of the labyrinthine, were greater in Hunt syndrome than in Bell's palsy. 3. The diameter of the mastoid segment and Sunnybrook score were associated with the time course in Bell's pal-sy, whereas the diameter of the vertical segment and CSA of the geniculate ganglion were associated with the time course in Hunt syndrome. Conclusions High resolution spiral CT multiplanar reformatting and curved planar reformat-ting can provide useful information for the research, as well as diagnosis and treatment, of Ramsay-Hunt Syndrome and Bell's palsy.