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Journal of Orthopaedic Surgery and Research

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Open Access 01-12-2019 | Computed Tomography | Research article

Pelvic incidence measurement using a computed tomography data-based three-dimensional pelvic model

Authors: Hong-Fang Chen, Jie Mi, Heng-Hui Zhang, Chang-Qing Zhao

Published in: Journal of Orthopaedic Surgery and Research | Issue 1/2019

Abstract

Objectives

To introduce a new method of pelvic incidence (PI) measurement based on three-dimensional (3D) pelvic models reconstructed from CT images and to report the normal distribution of PI in normal pelvic anatomy.

Methods

CT images of 320 subjects with normal pelvic anatomy who visited the Radiology Department between 2006 and 2017 were retrospectively selected and saved in Digital Imaging and Communications in Medicine (DICOM) format. A computerized method was employed to determine the bony landmarks required for the measurement of PI. To quantify the method’s accuracy and reliability, the intraclass correlation coefficient (ICC) was calculated. A subgroup of 30 DICOM files was randomly selected to perform a validation study. Three independent testers performed all procedures. All measurements were performed twice independently by the three testers on all 10 subjects with an interval of 2 weeks. Independent samples t tests were used to identify statistically significant differences in the PI value between sexes. Pearson correlation coefficient was employed to determine the relationship between PI and age.

Results

PI measurement using the new method resulted in an excellent intraobserver reliability (0.9612, range 0.8917–0.9893; p < 0.001) and interobserver reliability (0.9867, range 0.9611–0.9964; p < 0.001). PI was significantly different between sexes, with larger PI in women (p = 0.019). PI was significantly larger in the 40–80-year age group (45.94 ± 9.08°) than the < 40-year age group (43.50 ± 7.39°). We did not find any linear correlation between PI and age in the male (r = 0.140, p = 0.105) or female subgroup (r = 0.119, p = 0.107). A weak correlation between PI and age overall was observed (r = 0.142, p = 0.011).

Conclusion

Accurate PI measurement could be achieved by a CT data-based 3D pelvic model.

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Title: Pelvic incidence measurement using a computed tomography data-based three-dimensional pelvic model
Authors: Hong-Fang Chen
Jie Mi
Heng-Hui Zhang
Chang-Qing Zhao
Publication date: 01-12-2019
Publisher: BioMed Central
Keywords: Computed Tomography
Computed Tomography
Published in: Journal of Orthopaedic Surgery and Research / Issue 1/2019
Electronic ISSN: 1749-799X
DOI: https://doi.org/10.1186/s13018-018-1050-4

Keynote webinar | Spotlight on medication adherence

Springer Medicine

Pelvic incidence measurement using a computed tomography data-based three-dimensional pelvic model

Abstract

Objectives

Methods

Results

Conclusion

Keynote webinar | Spotlight on medication adherence

Springer Medicine

Abstract

Objectives

Methods

Results

Conclusion

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