Measurements of normal inner ear on multi-slice computed tomography / 实用放射学杂志

ABSTRACT

Objective To evaluate the anatomical and developmental characteristics of inner ears and establish a normalized inner ear multi-slice computed tomography (MSCT)measurement standard.Methods The raw data of 81 normal head MSCT cases were amplified and reconstructed in inner ear areas and multi-plannar reformation (MPR)was used to measure diameters of the inner ears.-test was used to inspect the difference between sides and genders,one-way analysis of variance was adopted for different age groups. Significance level α=0.05,P <0.05 was considered statistically significant.Results There was no statistical significance in measured values of inner ears in different age groups,genders and sides.Not all the shapes of bony semicircular canals were completely circu-lar or elliptical.In lumen,posterior semicircular canal was maximal and superior semicircular canal was minimal.In height,posterior semicircular canal was maximal and lateral semicircular canal was minimal.In width,superior semicircular canal was maximal and lateral semicircular canal was minimal.Conclusion Measurement specifications of inner ear on MSCT are initial established,main structures of inner ear can be clearly displayed by post-processing of head MSCT raw data.