Establishment of a mathematical model for calculating cochlear length
10.3760/cma.j.issn.1673-0860.2016.06.009
- VernacularTitle:一种用于计算耳蜗长度的数学模型的建立
- Author:
Lingling ZHONG
1
,
2
;
Qingqing HAO
;
Lili REN
;
Weiwei GUO
;
Shiming YANG
Author Information
1. 100853 北京,解放军总医院耳鼻咽喉头颈外科
2. 300071 天津,南开大学医学院
- Keywords:
Cochlea;
Tomography,X-ray computed;
Image processing,computer-assisted;
Archimedean spiral;
Swine,miniature
- From:
Chinese Journal of Otorhinolaryngology Head and Neck Surgery
2016;51(6):446-450
- CountryChina
- Language:Chinese
-
Abstract:
Objective To compare the cochlear length of the miniature pig calculated by 3-dimensional reconstruction technique and an Archimedean spiral model,and to evaluate the feasibility of determining the length of the cochlea using a mathematical model.Methods The temporal bones of three miniature pigs with normal hearing were selected and scanned by micro-CT.The pictures were input into Mimics software,the 3D structure of the inner ear was reconstructed,and the following parameters were determined through Mimics:cochlear length,diameter of each turn,cochlear height,and apical turn angle.The cochlear length was calculated using the Archimedean spiral model.Results The length of the cochlea was (35.30 ± 0.88)mm based on the three-dimensional reconstruction technique compared to (34.85 ± 0.64) mm based on the Archimedean spiral model.The differences between the two values were not statistically significant.The height of the cochlea is (2.64 ± 0.24) mm.The capsule of the cochlea had 3.67 turns.Conclusions The three-dimensional reconstruction technique provides accurate and reliable results,but the reconstruction process is time-consuming and is unsuitable for clinical application.The Archimedean spiral model method is simple,feasible,reliable,and therefore suitable for clinical applications,in particular to provide references for cochlear implantation surgeries.
