Influences of nonplanarity on the measurements of the posterior semicircular canal angles

doi:10.16098/j.issn.0529-1356.2019.02.14

Abstract

Abstract:

Objective To measure the angles among the posterior semicircular canal, and to observe the influences of nonplanarity on the measurements. Methods With 3D Slicer,we directly measured angles among the left and right posterior semicircular canals from MRI volume data of 20 patients which underwent MRI scaning with 3D-CISS sequence,and then calculated angles among the posterior semicircular canals and sagittal head plane. Results The angle between the left and right posterior semicircular canals was 190.5°±8.9° between 73° and 108°,and the angle among the posterior semicircular canals and sagittal head plane was 45.3°±4.4° between 36.5°and 54°. Conclusion Whether the plane including or excluding the common crus will result in differences of up to 9°,therefore, this study is consistent with previous studies but this method is more intuitive and convenient.

Key words: Semicircular canal, Measurement, Space direction, Magnetic resonance imaging, Human

YANG Xiao-kai ZHENG Yan-yan CHEN Xiao-su. Influences of nonplanarity on the measurements of the posterior semicircular canal angles[J]. Acta Anatomica Sinica, 2019, 50(2): 232-235.

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