Measurements of the vestibule of normal inner ear on volume CT / 中华放射学杂志

ABSTRACT

Objective To measure the size and area of the vestibule of normal inner ear to provide basic data for further study of the vestibule-related diseases.Methods Two hundred forty patients (480 ears) who underwent temporal bone 64 slices CT scans were enrolled in this study from April 2011 to July 2012.These patients were divided into 4 groups,including Child group (＜ 18 years),Youth group (18-44 years),Adult group (45-59 years),and Elder group (≥ 60 years).The size and area of the vestibules were measured on the multiplanar reformatted images in post-processing workstation.Results There were no statistically significant differences in the size and area of vestibules in sides,genders and among the different groups (P ＞ 0.05),while there were statistically significant differences of those in different positions (P ＜ 0.05).Conclusion The measurements in different planes were as follow1) In axial plane,the length of vestibule and its 95％ confidence interval were (5.89 ± 0.34),5.22-6.56 mm,respectively; the width (2.47 ± 0.36),1.76-3.18 mm; the area(13.97 ± 1.71) 10.62-17.32 mm2 2) in coronal plane,the length of vestibule and its 95％ confidence interval were (5.10 ± 0.32),4.47-5.73 mm,respectively; the width (2.42 ± 0.21),2.01-2.83 mm; the area (11.30 ± 1.33),8.69-13.91 mm2 ;3)in sagittal plane,the length of vestibule and its 95 ％ confidence interval were(5.27 ± 0.33),(4..62-5.92) mm,respectively; the width (3.72 ± O.35),(3.03--4.41) mm; the area (13.77 ± 1.55),(10.73-16.81)mm2.The volume CT combined with post-processing technology can accurately measure the size and area of the vestibules.The data can provide quantitative basis for diagnosis of the vestibule-related diseases.