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Accuracy and Reliability of Computer-aided Anatomical Measurements for Vertebral Body and Disc Based on Computed Tomography Scans.
Orthop Surg. 2020 Jul 03 [Online ahead of print]OS

Abstract

OBJECTIVE

To assess whether the computed tomography (CT)-based method of three-dimensional (3D) analysis (Mimics) was accurate and reliable for spine surgical anatomical measurements.

METHODS

A total of 40 lumbar segments and 32 inter-vertebral discs from eigth adult male cadavers without fractures or deformities fixed with the classical formaldehyde method were included in this research on 5 June 2017. CT scans including seven dimensions: anterior height of the vertebral body (VBHa), middle height of the vertebral body (VBHm), posterior height of the vertebral body (VBHp), width of the upper endplate (EPWu), depth of the upper endplate (EPDu), anterior height of the inter-vertebral disc in the median sagittal plane (IDHa), and posterior height of the inter-vertebral disc in the median sagittal plane (IDHp). They were performed based on uniform conditions (slice thickness: 0.625 mm) using a CT scanner on 8 June 2017. Afterwards, the surgical anatomical measurements were conducted with a Vernier caliper on 12 June 2017. The computer-aided anatomical measurements were conducted by three investigators using Mimics 16.0 to perform 3D reconstructions of CT bone on 16 June 2017. Finally, the length and angle were measured with associated measurement tools, yielding a verified accuracy of 0.01 mm and 0.01°, respectively. Each measurement was repeated three times, and all anatomical data was analyzed using the statistical software and P-value < 0.05 was considered statistically significant.

RESULTS

The results showed no statistically significant difference was observed between the surgical anatomical and computer-aided anatomical measurements (P > 0.05) for lumbar vertebra measurements, and the absolute difference between surgical and computer-aided data were all less than 1.0 mm (for the VBHa, VBHm, VBHp, EPWu, and EPDu were 0.12, 0.03, 0.03, 0.31, and 0.03 mm, respectively). Moreover, although the absolute differences of discs was larger than those of lumbar vertebras, no significant differences were detected between the computer-aided and surgical anatomical measurements for the IDHa, as well as IDHp in the vast majority of measurements (P = 0.543, 0.079 or 0.052 for IDHa, and P = 0.212, 0.133 or 0.042 for IDHp). In addition, excellent reliability correlation was observed between the measurements of each investigator, and the reliability coefficients in the intra-groups were all greater than 0.9 except for IDHp (reliability coefficient = 0.892). Additionally, the reliability coefficients were greater than 0.9 for the all between-group correlations, and a significant correlation was also observed. Furthermore, no statistically significant difference for three anatomical values was found in the computer-assisted measurements of the lumbar bone structure (P > 0.05). Similarly, we did not observe a statistical difference in the anatomical data of the lumbar discs from the three measures (P > 0.05).

CONCLUSIONS

Computer-aided anatomical measurement for spine based on CT scans presents the high accuracy and reliability for improving spinal surgical procedures.

Authors+Show Affiliations

The Key Laboratory of Biomedical Information Engineering, Ministry of Education, School of Life Science and Technology, Xi'an Jiao Tong University, Xi'an, China. Department of Nursing, Shaanxi University of Chinese Medicine, Xianyang, China.The Key Laboratory of Biomedical Information Engineering, Ministry of Education, School of Life Science and Technology, Xi'an Jiao Tong University, Xi'an, China. Department of Orthopaedic, Affiliated Hospital of Shaanxi University of Chinese Medicine, Xianyang, China.Department of Orthopaedic, Affiliated Hospital of Shaanxi University of Chinese Medicine, Xianyang, China.Spinal Cord Surgery, People's Hospital of Henan Province, Jinshui District, Zhengzhou, China.Department of Nursing, Shaanxi University of Chinese Medicine, Xianyang, China.Department of Nursing, Shaanxi University of Chinese Medicine, Xianyang, China.Department of Nursing, Shaanxi University of Chinese Medicine, Xianyang, China.The Key Laboratory of Biomedical Information Engineering, Ministry of Education, School of Life Science and Technology, Xi'an Jiao Tong University, Xi'an, China.

Pub Type(s)

Journal Article

Language

eng

PubMed ID

32618427

Citation

Yao, Jie, et al. "Accuracy and Reliability of Computer-aided Anatomical Measurements for Vertebral Body and Disc Based On Computed Tomography Scans." Orthopaedic Surgery, 2020.
Yao J, Dong B, Sun J, et al. Accuracy and Reliability of Computer-aided Anatomical Measurements for Vertebral Body and Disc Based on Computed Tomography Scans. Orthop Surg. 2020.
Yao, J., Dong, B., Sun, J., Liu, J. T., Liu, F., Li, X. W., Yuan, P. W., & Zhang, J. B. (2020). Accuracy and Reliability of Computer-aided Anatomical Measurements for Vertebral Body and Disc Based on Computed Tomography Scans. Orthopaedic Surgery. https://doi.org/10.1111/os.12729
Yao J, et al. Accuracy and Reliability of Computer-aided Anatomical Measurements for Vertebral Body and Disc Based On Computed Tomography Scans. Orthop Surg. 2020 Jul 3; PubMed PMID: 32618427.
* Article titles in AMA citation format should be in sentence-case
TY - JOUR T1 - Accuracy and Reliability of Computer-aided Anatomical Measurements for Vertebral Body and Disc Based on Computed Tomography Scans. AU - Yao,Jie, AU - Dong,Bo, AU - Sun,Ju, AU - Liu,Jian-Tao, AU - Liu,Fang, AU - Li,Xiao-Wei, AU - Yuan,Pu-Wei, AU - Zhang,Jian-Bao, Y1 - 2020/07/03/ PY - 2019/10/08/received PY - 2020/05/08/revised PY - 2020/05/17/accepted PY - 2020/7/4/entrez KW - Anatomy KW - Mimics KW - Spine KW - Three-dimensional imaging KW - Tomography JF - Orthopaedic surgery JO - Orthop Surg N2 - OBJECTIVE: To assess whether the computed tomography (CT)-based method of three-dimensional (3D) analysis (Mimics) was accurate and reliable for spine surgical anatomical measurements. METHODS: A total of 40 lumbar segments and 32 inter-vertebral discs from eigth adult male cadavers without fractures or deformities fixed with the classical formaldehyde method were included in this research on 5 June 2017. CT scans including seven dimensions: anterior height of the vertebral body (VBHa), middle height of the vertebral body (VBHm), posterior height of the vertebral body (VBHp), width of the upper endplate (EPWu), depth of the upper endplate (EPDu), anterior height of the inter-vertebral disc in the median sagittal plane (IDHa), and posterior height of the inter-vertebral disc in the median sagittal plane (IDHp). They were performed based on uniform conditions (slice thickness: 0.625 mm) using a CT scanner on 8 June 2017. Afterwards, the surgical anatomical measurements were conducted with a Vernier caliper on 12 June 2017. The computer-aided anatomical measurements were conducted by three investigators using Mimics 16.0 to perform 3D reconstructions of CT bone on 16 June 2017. Finally, the length and angle were measured with associated measurement tools, yielding a verified accuracy of 0.01 mm and 0.01°, respectively. Each measurement was repeated three times, and all anatomical data was analyzed using the statistical software and P-value < 0.05 was considered statistically significant. RESULTS: The results showed no statistically significant difference was observed between the surgical anatomical and computer-aided anatomical measurements (P > 0.05) for lumbar vertebra measurements, and the absolute difference between surgical and computer-aided data were all less than 1.0 mm (for the VBHa, VBHm, VBHp, EPWu, and EPDu were 0.12, 0.03, 0.03, 0.31, and 0.03 mm, respectively). Moreover, although the absolute differences of discs was larger than those of lumbar vertebras, no significant differences were detected between the computer-aided and surgical anatomical measurements for the IDHa, as well as IDHp in the vast majority of measurements (P = 0.543, 0.079 or 0.052 for IDHa, and P = 0.212, 0.133 or 0.042 for IDHp). In addition, excellent reliability correlation was observed between the measurements of each investigator, and the reliability coefficients in the intra-groups were all greater than 0.9 except for IDHp (reliability coefficient = 0.892). Additionally, the reliability coefficients were greater than 0.9 for the all between-group correlations, and a significant correlation was also observed. Furthermore, no statistically significant difference for three anatomical values was found in the computer-assisted measurements of the lumbar bone structure (P > 0.05). Similarly, we did not observe a statistical difference in the anatomical data of the lumbar discs from the three measures (P > 0.05). CONCLUSIONS: Computer-aided anatomical measurement for spine based on CT scans presents the high accuracy and reliability for improving spinal surgical procedures. SN - 1757-7861 UR - https://www.unboundmedicine.com/medline/citation/32618427/Accuracy_and_Reliability_of_Computer-aided_Anatomical_Measurements_for_Vertebral_Body_and_Disc_Based_on_Computed_Tomography_Scans L2 - https://doi.org/10.1111/os.12729 DB - PRIME DP - Unbound Medicine ER -
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