ABSTRACT

In this paper, to evaluate; the efficiency of multislice CT and MRI in determinination of gender by measuring the lateral angle of the internal acoustic canal meatus, if there is a differen-ce between right and left lateral angle, and the correlation bet-ween age and the lateral angle. Lateral angles of both the righ and left internal acoustic canal meati were measured in 301 pa-tients (163 females and 138 males) on axial slices of multislice CT scans of the temporal bone or on axial slices of MRI scans of the internal acoustic canal. The measurement technique was modified from a prior CT study by Akansel et al. Patiens vere divided into three main groups as: all patiens (CT + MRI), CT only, MRI only. All main goups were divided into four subgroups according to age as follows: 0-9 years, 10-17 years, 017 years and older than 17 years. For measuring the lateral angle, bone algoritm was used for CT and the DRIVE sequence was used for MRI. The mean values from patients were compa-red statistically. There was no significant difference between the right and left side measurements with the exception of fe-male CT patients of 0-9 years age. For all main groups and sub-goups, the mean lateral angle of the right and left internal aco-ustic canal was greater in females than in males and especially on adult grup (18 and older) this difference was statistically sig-nificant .The mean lateral angle measurements of the internal acoustic canal meatus on multislice CT and MRI are not diffe-rent statistically between sides for both genders. Multislice CT and MRI can also be used as a way in determinination of gen-der by measuring the lateral angle of the internal acoustic canal meatus.

Keywords: Temporal bone, sex determination, multislice computerized tomograpy, magnetic resonance imaging